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1
Weatherley, AJ, MDA Bolland, and RJ Gilkes. "A comparison of values for initial and residual effectiveness of rock phosphates measured in pot and field experiments." Australian Journal of Experimental Agriculture 28, no. 6 (1988): 753. http://dx.doi.org/10.1071/ea9880753.
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The effectiveness of Calciphos (500�C calcined calcium-aluminium C-grade rock phosphate from Christmas Island), Queensland rock phosphate (low carbonate substituted apatite, from Duchess deposit, Northern Queensland [QRP]), and granular North Carolina rock phosphate (highly carbonate substituted apatite from U.S.A. [NCRP]) were compared with the effectiveness of monocalcium phosphate (MCP) fertilisers in pot and field experiments. Three different lateritic soils from south-western Australia and different plant species were used. In the pot experiment, the effectiveness of the fertilisers was measured relative to freshly applied MCP for 5 successive crops. Subterranean clover, oats, triticale and barley were grown for about 1 month before harvesting. In the field experiment, the same plants were grown, and the effectiveness of the fertilisers was measured relative to freshly applied triple superphosphate for 3 successive years. On a dry matter yield basis, the effects of freshly applied rock phosphate dressings measured in the pot experiment were in a similar range to those measured in the field experiment for the same soil types, and the same plant species, indicating that pot trials can substitute for field trials for the evaluation of the initial effectiveness of fertilisers. However, the residual effectiveness values for both MCP and the RPs were generally much lower for the pot experiment, indicating that pot experiments cannot replace long-term field experiments for the reliable measurement of residual effectiveness of fertilisers. For the pot experiment, the relative effectiveness values of freshly applied NCRP and Calciphos for all soils were 0.2-0.3 and 0.1-0.2 respectively. The corresponding values for the field experiment were 0.1-0.3 for NCRP and 0.1 for Calciphos. For the pot experiment, the relative effectiveness of freshly applied QRP on all soils ranged from 0.03 to 0.1, compared with from 0.1 to 0.3 for the field experiment. The relative effectiveness of all fertilisers declined markedly with successive crops (i.e. crops 2-5) in the pot experiment, whereas in the field experiment the relative effectiveness of QRP and NCRP showed no systematic change for the 3-years of the experiment. For the pot experiment the relative effectiveness of residual MCP decreased to about 0.3, 0.2 and 0.1, compared with 0.5, 0.2 and 0.5 for the field experiment for West Dale, South Bodallin and Gibson soils, respectively. For the pot experiment and for all soils the residual relative effectiveness of NCRP and Calciphos was about 0.01- 0.04, compared with 0.003-0.02 for QRP. For the field experiment the corresponding values were 0.05-0.2 for NCRP and Calciphos and 0.01-0.1 for QRP. For both the pot and the field experiments the relationship between yield and phosphorus content was sometimes dependent on fertiliser type.
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Čechmánková, J., R. Vácha, J. Skála, and M. Havelková. "Heavy metals phytoextraction from heavily and moderately contaminated soil by field crops grown in monoculture and crop rotation." Soil and Water Research 6, No. 3 (September 19, 2011): 120–30. http://dx.doi.org/10.17221/26/2010-swr.
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The uptake of Pb, Cd, Zn and biomass production of the plants Brassica juncea v. Opaleska, Triticale hexaploides var. Gabo and Helianthus annuus v. Maritza were observed in a field (trial) and a pot experiments during four years. The plants were grown in monoculture variants and also in crop rotation. The field experiment (plots about 1 × 1 m) was set up in heavily contaminated Haplic Fluvisol in the Litavka River alluvium. Pb, Cd, and Zn phytoextraction from the identical Haplic Fluvisol and Haplic Cambisol less contaminated mainly by atmospheric deposition was observed in the pot experiment. The application of 0.2 g EDTA (ethylenediaminetetraacetic acid)/kg and 1 g citric acid/kg into the soils of field (250 kg of soil/m<sup>2</sup> plot) and pot (6 kg of soil/pot) experiments was realized. The comparison was accomplished between natural phytoextraction efficiency of B. juncea, H. annuus, and T. hexaploides. Crop rotation with and without chemical induction was tested. EDTA application had an immediate strong mobilization effect on the elements tested in both experiments and both soils. In the pot experiment, Pb, Cd, and Zn were more mobilized in Cambisol with initial lower mobile contents of elements in comparison with Fluvisol. The highest mobilization by EDTA was achieved for Pb. Strong Pb mobilization in Cambisol after EDTA addition resulted in a high Pb uptake and translocation from the roots of B. juncea into the shoots. EDTA application increased Pb phytoextraction by harvested B. juncea. Naturally grown H. annuus proved the high phytoextraction efficiency for Cd and Zn in the experiment. The assumed effect of the cultivation method, i.e. crop rotation vs. Monoculture, was not statistically proved in our experiments.
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Conover, C. A. "019 USE OF PACLOBUTRAZOL TO INCREASE LEAF SIZE AND SALABILITY OF Epipremnum aureum `Golden Pothos' ON TOTEMS." HortScience 29, no. 5 (May 1994): 430c—430. http://dx.doi.org/10.21273/hortsci.29.5.430c.
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Results of a preliminary experiment using paclobutrazol at 0, 12 or 24 mg a.i./3.6-liter pot indicated that its use could enhance the appearance of pothos, but that some refinement of paclobutrazol rates should be made. Two experiments were conducted to determine the rate of paclobutrazol necessary to increase leaf size and optimize plant quality of pothos on totems in 3.6-liter pots grown under shadecloth providing 50% light penetration. In Experiment 1, rooted pothos cuttings were transplanted around a totem pole in a 3.6-liter pot and each pot was treated with a 250-ml drench of water containing Bonzi™ at 0, 4, 8, 12 or 16 mg a.i. Four mg a.i. of paclobutrazol yielded the most desirable plants, based on average leaf size, vine length and plant grade. Experiment 2 was designed to further refine the paclobutrazol application rate. Rooted cuttings of pothos were transplanted around a totem pole in a 3.6-liter pot and each pot was treated with a 100-ml drench of water containing paclobutrazol at 0, 1.32, 2.64, 3.96, 5.28, 6.60 or 7.92 mg a.i. Paclobutrazol applied at a rate of 5.28 mg a.i./3.6-liter pot optimized plant appearance by increasing leaf size and plant grade.
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Agbaglo, Samuel Y., Seloame T. Nyaku, Hannah D. Vigbedor, and Eric W. Cornelius. "Pathogenicity of Meloidogyne incognita and Fusarium oxysporum f. sp. vasinfectum on Growth and Yield of Two Okra Varieties Cultivated in Ghana." International Journal of Agronomy 2020 (July 25, 2020): 1–12. http://dx.doi.org/10.1155/2020/8824165.
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The interaction of the fungus, Fusarium oxysporum f. sp. vasinfectum (FOV), and the nematode, Meloidogyne incognita, on wilt disease on “Essoumtem” and Clemson spineless okra varieties, was examined in pot and field experiments from September 2016 to June 2017, in the University of Ghana farms. Four-week-old “Essoumtem” and Clemson spineless seedlings for pot experiment and one-week-old “Essoumtem” and Clemson spineless seedlings for field experiment were inoculated with fungus, Fusarium oxysporum, and nematode, Meloidogyne incognita. The individual, simultaneous, and sequential inoculation of second stage juveniles (at 1000 J2/kg soil) of Meloidogyne incognita and Fusarium oxysporum (1.1 × 106 cells/kg soil) resulted in significant reduced plant growth parameters (plant height, plant girth, chlorophyll content, fresh and dry shoot weights, and fresh and dry root weights). Maximum suppression in plant growth parameters was observed in plants that received NF21 (Fusarium oxysporum inoculated 21 days after Meloidogyne incognita on okra) and F21 (fungus inoculated 21 days after seedling emergence) treatments for pot and field experiments, respectively. The least suppression of plant growth parameters was observed in separate inoculations of the two pathogens for both pot and field experiments. Maximum suppression in yield parameters was observed in okra plants that received NF21 and F21 treatments for pot and field experiments, respectively. Minimal yield suppression was observed for individual inoculations (N and F treatments) in both pot and field experiments. The highest severity of wilt disease was observed on okra plants that received NF21 and F21 treatment in both pot and field experiments. Plants in control plots had higher yields and the least wilt incidences (0.0%).
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Salo, Tapio, Liisa Pietola, and Raili Jokinen. "The effect of chloride and nitrogen on nitrate accumulation and yield in beetroot (Beta vulgaris var. conditiva)." Agricultural and Food Science 1, no. 3 (May 1, 1992): 351–60. http://dx.doi.org/10.23986/afsci.72445.
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A pot and a field experiment were conducted to evaluate the effects of different nitrogen and chloride fertilizer levels on the nitrate content of beetroot. The yield and dry matter content were also determined. Sulphate fertilization was used as a control to chloride fertilization. There was a considerable decrease in the nitrate content of beetroots during the growing season. High nitrogen fertilization caused nitrate accumulation in both experiments. Chloride had a significant decreasing effect on the nitrate accumulation towards the middle of the growing period in the pot experiment. In the field experiment, chloride also decreased nitrate accumulation towards the middle of the growing period, soon after additional application of ammonium nitrate limestone (13.8 % NH4-N; 13.7 % NO3-N). Chloride tends to decrease nitrate accumulation only at an early stage of root development when nitrate is not the only source of nitrogen in the soil. The yield was higher on high nitrogen supply, in the pot experiment also on chloride application. Nitrogen decreased the dry matter content, but chloride had this effect only in the field experiment.
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Pham, Duong T. T. "Effect of nitrogen levels on growth and development of three Lisianthus (Eustoma grandiflorum (Raf.) Shinn) cultivars pot-planted in Ho Chi Minh City." Journal of Agriculture and Development 19, no. 04 (June 30, 2020): 10–17. http://dx.doi.org/10.52997/jad.2.04.2020.
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Lisianthus (Eustoma grandiflorum (Raf.) Shinn) is favored in decoration because of its long-lasting and colorful flowers. The objective of the experiment was to evaluate the effects of different levels of nitrogen on the growth and development of three Lisianthus cultivars pot-planted in Ho Chi Minh City. The experiment was laid out in split - plot design (SPD) with four levels of nitrogen (3; 4; 5; 6 g/pot) being the main factor and three Lisianthus cultivars (Pink; Yellow; White/Purple) being the subordinate factor. Each pot was planted with one plantlet. The results indicated that plants applied with 4.0 g nitrogen per pot gave the best performance in plant height (18.41 cm) and number of leaves (24.08 leaves/plant) at 60 days after planted (DAP). The Pink cultivar reached the highest plant height (19.92 cm), number of leaves (43.53 leaves/plant) as well as number of flowers buds (12.31 buds/plant). The Pink cultivar, when applied with 4.0 g nitrogen/pot, gave the highest plant height (21.38 cm) at 60 DAP.
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Hoang Minh Tam and Cao Ngoc Diep. "Plant growth promotion effects of rhizopheric and endophytic bacteria on sugarcane cultivated on Acrisols of Tay Ninh province, Vietnam." GSC Biological and Pharmaceutical Sciences 13, no. 3 (December 30, 2020): 210–21. http://dx.doi.org/10.30574/gscbps.2020.13.3.0408.
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Plant growth promotion of the best two strains: Serratia oryzae CT4b and Bacillus subtilis TPD3b together with chemical nitrogen and phosphorus fertilizers were continuously evaluated on sugarcane cultivated on Acrisols of Tay Ninh province, Vietnam in pots and field experiments. The experiments were arranged into a Split-Plot Design with four replications. The main plot factor was N-P fertilizer at five levels: without N-P, 25% N-P, 50% N-P, 75% N-P and 100% N-P for the pot experiment and at four levels: without N-P; 50% N-P; 75% N-P; and 100% N-P for the field experiment. The sub-plot factor was bacterial inoculation with 4 treatments: no bacteria; CT4bd; TPD3b; and mixture of both. Recommended amount of nitrogen and phosphorus fertilizers for sugarcane planted on Acrisols of Tay Ninh province were 200 kg N, 160 kg P2O5 in a hectare. The results showed that a combination of two bacteria had the highest plant growth stimulation potential. The mixture at rate of 75% N- P fertilizers produced sugarcane yield equal to that at level of 100% N-P fertilizer without bacteria in the pot experiment; increased sugar yield by 14.4%, equivalent to 1.02 ton / ha in the field trial and saved 25% of N-P fertilizer application. These two potential strains were proposed to be tested their ability to promote plant growth on many different sugarcane varieties in both plant-cane and ratoon crops in different material sugarcane areas of Tay Ninh province.
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Jakab, Anita, and János Kátai. "The effect of biopreparations in pot experiment." Acta Agraria Debreceniensis, no. 52 (March 20, 2013): 45–49. http://dx.doi.org/10.34101/actaagrar/52/2098.
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In pot experiment the effect of Amykor and Organic Green Gold bioproducts and their combinations with NPK fertilizer on some soil properties (chemical parameters) and on the biomass of testplant were studied. The experiment was set up in 2012 at the Institute of Agricultural Chemistry and Soil Science, in a three replications, in a random block design. The studied soil typein the pot experiment was humus sandy soil from Debrecen-Pallag with onion (Allium cepa) test plant. At the end of the experiment (after 4 week) in our laboratory the samples of soil and plant were determined. The nitrate-nitrogen, AL-soluble phosphorus and potassium content of soil, the weight of green onion leaves, the wet weight of bulb and root of onion and biomass of onion. The results of the study were the following: – The treatments influenced positively the nitrate-nitrogen, the AL-soluble phosphorus and potassium content of soil. – The most effective treatments were the artificial fertilization (NO3-N) and the NPK+ simple dose of Amykor (AL-P2O5 and Al-K2O). – The NPK fertilization and the NPK+OGG (sprinkle in every 10 days) combinations had significant positive effect on the weight of green onion leaves. – The biofertilization and the straw+biofertilizer combinations stimulated the AL-soluble potassium content of soil occasionally. – The OGG treatment (sprinkle in every 10 days) had significant effective impact on the wet weight of bulb and root of onion. – The biomass of onion was increased by the artificial fertilization and OGG (sprinkle in every 10 days) treatment.
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Lu, Yunxuan, Donghao Ma, Xiaomin Chen, and Jiabao Zhang. "A Simple Method for Estimating Field Crop Evapotranspiration from Pot Experiments." Water 10, no. 12 (December 11, 2018): 1823. http://dx.doi.org/10.3390/w10121823.
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Pot experiments are a low-cost and easy-to-use technique for studies of soil evaporation and plant transpiration in controlled environments. However, little attention has been paid to the applicability of evapotranspiration (ET) measured in pot experiments to the field. The objective of this study was to determine whether a pot experiment can be used for measuring field ET. Evapotranspiration experiments with winter wheat and summer maize were conducted in pots and lysimeters under various water-deficit conditions. The measured ET values in the pot experiments under different water conditions were considerably different from those of the lysimeters. Causes of such differences in ET were analyzed, and a series of corrections were proposed to eliminate the effects of different crop densities, representative areas per plant, and soil moisture conditions on pot experiment results. After these corrections, the discrepancy in the total ET of wheat-maize seasons between pots and lysimeters was greatly reduced from a maximum of 117% to only approximately 10%. The relative mean square errors (RMSEs) for daily ET values also decreased from a maximum value of 4.56 mm to less than 1.5 mm for the wheat season and from a maximum value of 6.02 mm to approximately 2 mm for the maize season. Possible measures were proposed to further improve the accuracy of the corrected ET obtained from pot experiments. In sum, pot experiments can serve as a feasible tool for estimating ET in the field just with a few routine measurements at regions where large-scale weighing lysimeters, an eddy covariance device, and even meteorological data are not available. The proposed corrections can also be used for upscaling small-scale ET measurements to a large scale.
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Lyngdoh, E. A. S., and Sanjay Swami. "Potential screening of photoremediating crops and performance of maize in photoremediated coal mined acid soil with phosphorus application." Journal of Environmental Biology 41, no. 6 (November 15, 2020): 1788–97. http://dx.doi.org/10.22438/jeb/41/6/si-283.
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Aim: To assess the ability of phosphorus to counteract harmful effects of heavy metals by reducing their concentration and increasing the maize yield. Methodology: Bulk surface soil sample (0-15 cm) was collected from heavy metal polluted soil of coal mine areas of Sutnga. Two pot experiments were conducted. Ten kg capacity pots were laid out for three phytoremediating crop and replicated 33 times. The processed soil was used for filling the pots. The first pot experiment was conducted to assess the phytoremediation efficiency of Helianthus annus and Vigna ungniculata on heavy metal polluted soil. Thereafter in the second pot experiment Zea mays L. was planted in pots maintained under experiment 1 and subsequently eleven levels of phosphorus i.e. 0, 10, 20, 30, 40, 50, 60, 70, 80, 90 and 100 mg P kg-1 soil were super imposed in non-phytoremediated soil, phytoremediated soils through SSP. The elemental uptake and concentration of available phosphorus and heavy metal was determined.? Results: From the first pot culture experiment, it was observed that heavy metals content in soil after harvesting of phytoremediating crops reduced significantly in both the phytoremediated soils as compared to non-phytoremediated soil. From the second pot experiment it was observed that phosphorus as well as the heavy metals concentration and uptake in maize decreased significantly with increasing doses of phosphorus added in non phytoremediated soil.? Interpretation: This study clearly indicates that sunflower can be successfully grown as a phytoremediating crop in coal mine affected soils of Jaintia hills for phytoremediation of heavy metal polluted soils.
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Watson, B. M. "the effect of endophyte in perennial ryegrass and tall fescue on red and blackheaded pasture cockchafers." NZGA: Research and Practice Series 13 (January 1, 2007): 347–52. http://dx.doi.org/10.33584/rps.13.2006.3169.
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Perennial ryegrass (Lolium perenne L.) and tall fescue (Festuca arundinacea Schreb.) are two of the most productive pasture species grown to feed livestock in Australia. The larvae of redheaded (RHC) (Adoryphorus couloni Burmiester) and blackheaded (BHC) (Accrosidius tasmaniae Hope) cockchafer cause significant damage to these pastures in Australia. If alkaloids produced by endophyte associations could reduce this impact, economic gains would be made. A pot experiment and then a proof of concept seed feeding experiment were undertaken to test the resistance of perennial ryegrass and tall fescue to cockchafer larvae. The objective was to allow larvae to feed on endophyte infected plants, assuming insecticidal alkaloids would be produced and on nil endophyte plants as controls. The plants in the pot experiment were tested for presence or absence of alkaloid endophyte but not for concentration or location in plant parts prior to larvae being introduced. In the seed feeding experiment seed fed to larvae was tested for all known alkaloid concentrations and profiles. The weight difference and mortality of third instar larvae and weight difference of plant root and shoot were measured in the pot experiment. The weight difference and mortality of the third instar larvae and the number and weight of seeds consumed were measured in the seed feeding experiment. There was no significant effect of endophyte treatments on the cockchafer weight change or mortality in either the perennial ryegrass or tall fescue pot or seed feeding experiments. There was a significant difference between cockchafer species (P
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Poorter, Hendrik, Jonas Bühler, Dagmar van Dusschoten, José Climent, and Johannes A. Postma. "Pot size matters: a meta-analysis of the effects of rooting volume on plant growth." Functional Plant Biology 39, no. 11 (2012): 839. http://dx.doi.org/10.1071/fp12049.
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The majority of experiments in plant biology use plants grown in some kind of container or pot. We conducted a meta-analysis on 65 studies that analysed the effect of pot size on growth and underlying variables. On average, a doubling of the pot size increased biomass production by 43%. Further analysis of pot size effects on the underlying components of growth suggests that reduced growth in smaller pots is caused mainly by a reduction in photosynthesis per unit leaf area, rather than by changes in leaf morphology or biomass allocation. The appropriate pot size will logically depend on the size of the plants growing in them. Based on various lines of evidence we suggest that an appropriate pot size is one in which the plant biomass does not exceed 1 g L–1. In current research practice ~65% of the experiments exceed that threshold. We suggest that researchers need to carefully consider the pot size in their experiments, as small pots may change experimental results and defy the purpose of the experiment.
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JENG, A., T. HARALDSEN, and N. VAGSTAD. "Meat and bone meal as nitrogen fertilizer to cereals in Norway." Agricultural and Food Science 13, no. 3 (December 4, 2008): 268. http://dx.doi.org/10.2137/1239099042643080.
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Meat and bone meal (MBM) contains appreciable amounts of nitrogen (N), phosphorus and calcium making it interesting as fertilizer to various crops. The effect of Norwegian MBM as N fertilizer has been evaluated in pot and field experiments. The soils used in the pot experiment were peat and a sand/peat mixture, both low in content of plant nutrients. The field experiment was carried out on a silt loam. In the pot experiment increasing amounts of MBM gave significantly increased yields, although there was a partly N immobilisation shortly after seeding the soil based on peat organic matter. In the field experiment there was no period of N immobilisation and good N effect was found also for small amounts of MBM (Total N 50 kg ha-1). At total N 100 kg ha-1 there were no significant differences in grain yield of spring wheat between the treatments with MBM, mineral N fertilizer, and combination of MBM and mineral N fertilizer (N 50 kg ha-1 from each). The results indicate that the relative N efficiency of MBM compared to mineral fertilizer is 80% or higher, if MBM is applied to cereals in spring.;
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Beeson, R. C., and K. Keller. "Effect of Cyclic Irrigation on Growth of Magnolias Produced Using Five In-ground Systems." Journal of Environmental Horticulture 21, no. 3 (September 1, 2003): 148–52. http://dx.doi.org/10.24266/0738-2898-21.3.148.
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Abstract Five in-ground systems were evaluated based on shoot growth and marketability for the production of 2.17 m (7 ft) tall and 5.08 cm (2 in) trunk diameter Magnolia grandiflora cv. ‘Symmes Select’. Systems evaluated were Root Control Bags, Geo-Cell bags, and #25 containers in pot-in-pot in Experiment 1, and Agro-liners in socket pots and directly in-ground in Experiment 2. Each system was either cyclically irrigated or given a single irrigation event daily. In Experiment 1, cyclic irrigation increased the rate of height growth and trunk diameter compared to a single irrigation. Trees in Root Control Bags and pot-in-pot grew at a similar rate and faster than those in Geo-Cell bags. Faster growth rates with cyclic irrigation resulted in earlier marketability compared to single irrigation daily, except for pot-in-pot. In Experiment 2, cyclic irrigation increased the rate of trunk diameter growth, and Agro-liners in pots had greater height and trunk diameter growth rates than those directly in ground. Trees grown in the in-ground pot systems, whether in Agro-liners or black polyethylene containers, grew similarly to trees in Root Control Bags. Trees grown in Geo-cells or Agro-liners in-ground had significantly slower growth than the other treatments.
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Maistrello, L., G. Vaccari, and N. Sasanelli. "Effect of chestnut tannins on the root-knot nematode Meloidogyne javanica." Helminthologia 47, no. 1 (March 1, 2010): 48–57. http://dx.doi.org/10.2478/s11687-010-0008-9.
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AbstractAmong the natural products extracted from plants, tannins have been reported to possess antihelmintic properties especially for gastrointestinal nematodes in ruminants. Also, they are toxic to a wide range of fungi, bacteria and yeasts. Therefore, an in vitro and a glasshouse pot experiments were undertaken to evaluate the effect of chestnut tannins on the control of the root-knot nematode Meloidogyne javanica. In the in vitro experiment, different tannin concentrations in a geometric scale (from 0.32 to 20.48 g/l), were tested for their effect on hatching of the nematode, whereas in the pot experiment, 100, 250 and 450 g/m2 of tannins in aqueous solutions, were used in pots at transplant or at transplant and two weeks later for their effect on nematode control. In both experiments treatments were compared to untreated and fenamiphos-treated controls. In vitro a nematostatic effect of tannins was observed, whereas in the pot experiment a significant reduction of eggs and juveniles/g root, total population density and reproduction rates of the nematode were recorded. The anatomical changes induced by M. javanica in tomato roots treated with tannins did not differ from those produced by this and other Meloidogyne species on various hosts reported earlier.
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Gabriela, Mühlbachová, Čermák Pavel, Vavera Radek, Káš Martin, Pechová Miroslava, Marková Kateřina, Kusá Helena, Růžek Pavel, Hlušek Jaroslav, and Lošák Tomáš. "Boron availability and uptake under increasing phosphorus rates in a pot experiment." Plant, Soil and Environment 63, No. 11 (November 20, 2017): 483–90. http://dx.doi.org/10.17221/480/2017-pse.
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The boron (B) availability in soils, B uptake and possible B interactions with phosphorus (P) were studied in a pot experiment with increasing P rates. Three soil types of different characteristics were used for the experiment that lasted two years. The two soil tests were used in the experiment – Mehlich 3 and NH<sub>4</sub>-acetate. Significant positive correlations were found between barley dry matter yield, B content in plants and B uptake under increasing P treatments (P ≤ 0.001). The significant relationship for B content (P ≤ 0.001) was obtained between the used soil tests for all tested soils. A decrease of soil B content in soils under increasing P doses was determined. NH<sub>4</sub>-acetate soil test showed a significant relationship between B and P contents (P ≤ 0.001) within the studied soils in comparison with the Mehlich 3 method. Considering individual soils, the NH<sub>4</sub>-acetate test showed more often higher significance in comparison with the Mehlich 3 test. The interactions between P and B in soils should be taken in consideration when deciding about the phosphorus fertilization.
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Bolland, MDA, and MJ Baker. "High phosphorus concentrations in seed of wheat and annual medic are related to higher rates of dry matter production of seedlings and plants." Australian Journal of Experimental Agriculture 28, no. 6 (1988): 765. http://dx.doi.org/10.1071/ea9880765.
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Seed of 2 cultivars of wheat (Triticum aestivum) and 1 burr medic (Medicago polymorpha) with increasing phosphorus (P) concentrations (wheat 1.4-3.7 g P/kg dry matter, medic 3.3-7.9 g P/kg dry matter) were collected from field experiments with variable levels of applied superphosphate (wheat 0- 577 kg P/ha, medic 0-364 kg P/ha) in south-western Australia. These seeds were used in further experiments to examine the effect of seed P concentration on the subsequent dry matter (DM) production of seedlings and plants in 3 glasshouse pot experiments and 1 field experiment. Seed of the same size (wheat, 35 mg/seed; medic, 3.6 mg/seed) but with increasing P concentration produced substantially higher DM yields in the absence or presence of freshly applied superphosphate P up to 28-35 days after sowing in the pot experiments and 67 days after sowing in the field experiment.
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Hossain, Md Shahdat, ABM Shafiul Alam, Momtahina Bipa, Md Sefaur Rahman, and Sharifa Siddeka. "Effects of salinity and variety on yield contributing characters and yield of Red amaranth." Research in Agriculture Livestock and Fisheries 6, no. 2 (September 9, 2019): 271–78. http://dx.doi.org/10.3329/ralf.v6i2.43050.
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An experiment was conducted to evaluate the effects of salinity and variety on yield and yield contributing characters of Red amaranth at Horticulture Farm of Bangladesh Agricultural University, Mymensingh. The experiment consisted of three varieties viz; Altapety, RM, Deshi and four levels of salinity viz; 0mM, 25mM, 50mM and 75mM. The experiment was laid out following RCBD with three replications. Variety had significant effect on yield characters and yield. The highest average weight of plant (9.69 g/pot), highest average root weight (2.13 g/pot), highest average root length (10.28 g/pot) and highest yield per pot (237.08g) were found from the variety Altapety and the lowest average weight of plant (7.67 g/pot), lowest average root weight (2.03 g/pot), lowest average root length (8.83 g/pot) and yield per pot (198.58g) were found from the variety RM. Salinity had significant effect on yield characters and yield. The highest average weight of plant (10.22 g/pot) was recorded from the variety Altapety at the application of 25mM NaCl, highest average of root weight (2.27 g/pot) was recorded from the variety Altapety at the application of 25mM NaCl, highest average of root length (10.29 g/pot) was recorded from the variety Altapety at the application of 25mM NaCl and yield (259.56g/pot) were found from the application of 25mM NaCl. The lowest average weight of plant (6.93 g/pot) was recorded from the variety RM at the application of 75mM NaCl solution, lowest average of root weight (1.78 g/pot) was recorded from the variety RM at the application of 75mM NaCl solution, lowest average of root length (8.12g/pot) was recorded from the variety RM at the application of 75mM NaCl solution and yield per pot (154.44g) were found from the application of 75mM NaCl.
Res. Agric., Livest. Fish.6(2): 271-278, August 2019
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Hindersah, Reginawanti, Priyanka Asmiran, June Putinella, Wilhelmina Rumahlewang, and Marthin Kalay. "ROLE OF BIOLOGICAL AGENT AZOTOBACTER-TRICHODERMA ON GROWTH AND YIELD OF CHILI (Capsicum annuum L.) IN A POT EXPERIMENT." Agric 29, no. 2 (December 11, 2017): 137–46. http://dx.doi.org/10.24246/agric.2017.v29.i2.p137-146.
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Soil microbes have suggested to be used as agricultural input. Nitrogen fixing rhizobacteria Azotobacter is responsible to maintain nitrogen nutrition and plant growth whereas Trichoderma enable to reduce soil born plant diseases through antagonistic activity. The objective of this pot experiment was to determine the dosage and application time of carrier- based Azotobacter-Trichoderma inoculant which increase nitrogen availability in soil, as well as growth and yield of chili (Capsicum annuum L.). Chili transplants were grown in low fertility soil mixed with cow manure. Experiment was set up in split plot design which tested four inoculant dosage and three application time. The result showed that effect of biological agent on plant height at three and six weeks after transplanting was not significant. Inoculation of 7,5 g/pot carrier-based Azoto-Tricho at planting time followed by soil dressing with Azotobacter liquid inoculant at 10 day after planting significantly increased NO3 - in soil. Carrier-based Azoto-Tricho inoculant irrespective of dosage and application time increased plant yield. The highest yield, 290 g plant-1, was showed by plant treated by 7,5 g po1t Azoto-Tricho at planting time followed by Azotobacter liquid inoculation. This pot experiment showed that carrier-based Azotobacter-Trichoderma inoculant has potential to be used as biological agent in chili production.
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Klock, Kimberly A. "Use of Paclobutrazol to Control Height of Impatiens Grown in Media Containing Compost." HortScience 32, no. 3 (June 1997): 436C—436. http://dx.doi.org/10.21273/hortsci.32.3.436c.
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Ornamental horticulture industries have the opportunity to utilize compost products as components in growing media, but heterogeneity among compost products can cause unpredictability in the activity of some growth regulators when applied as a drenches to the growing medium. These experiments evaluated the effect of 0%, 30%, 60%, or 100% compost (by volume) in the medium on the efficacy of paclobutrazol applied as a drench on Impatiens wallerana Hook. In experiment 1, paclobutrazol was applied at active ingredient (a.i.) drench rates of 0, 0.016, 0.032, 0.06, or 0.125 mg/pot 16 days after transplanting impatiens `Accent Red'. In experiment 2, paclobutrazol was applied at a.i. drench rates of 0, 0.25, 0.50, 1.0, or 2.0 mg/pot 14 days after transplanting impatiens `Dazzler Punch'. In both experiments, final height and size were reduced by paclobutrazol treatments compared to untreated plants. In experiment 1, shoot dry mass of treated plants was on the average of 0.92 g less than untreated plants, while shoot dry mass, in experiment 2, did not show a significant difference between treated and untreated plants. In both experiments, final height, size and shoot dry mass were significantly different among the media, with the greatest growth in 100% compost.
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Gunnabo, A. H., J. van Heerwaarden, R. Geurts, E. Wolde-meskel, T. Degefu, and K. E. Giller. "Symbiotic interactions between chickpea (Cicer arietinum L.) genotypes and Mesorhizobium strains." Symbiosis 82, no. 3 (September 30, 2020): 235–48. http://dx.doi.org/10.1007/s13199-020-00724-6.
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AbstractLegume genotype (GL) x rhizobium genotype (GR) interaction in chickpea was studied using a genetically diverse set of accessions and rhizobium strains in modified Leonard Jars. A subset of effective GL x GR combinations was subsequently evaluated in a pot experiment to identify combinations of chickpea genotypes and rhizobium strains with stable and superior symbiotic performance. A linear mixed model was employed to analyse the occurrence of GL x GR interaction and an additive main effects and multiplicative interaction (AMMI) model was used to study patterns in the performance of genotype-strain combinations. We found statistically significant interaction in jars in terms of symbiotic effectiveness that was entirely due to the inclusion of one of the genotypes, ICC6263. No interaction was found in a subsequent pot experiment. The presence of two genetic groups (Kabuli and Desi genepools) did not affect interaction with Mesorhizobium strains. With the exception of a negative interaction with genotype ICC6263 in the jar experiment, the type strain Mesorhizobium ciceri LMG 14989 outperformed or equalled other strains on all chickpea genotypes in both jar and pot experiments. Similar to earlier reports in common bean, our results suggest that efforts to find more effective strains may be more rewarding than aiming for identification of superior combinations of strains and genotypes.
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Mayasari, Dian, and Wayan WANGIYANA. "PERTUMBUHAN DAN HASIL BERBAGAI VARIETAS KACANG HIJAU ANTARA SISTEM MONOCROP DAN PENANAMAN BERSAMA PADI BERAS MERAH PADA SISTEM IRIGASI AEROBIK." AGROTEKSOS: Agronomi Teknologi dan Sosial Ekonomi Pertanian 28, no. 2 (March 3, 2020): 42. http://dx.doi.org/10.29303/agroteksos.v28i2.347.
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This study aimed to compare growth and yield components of various mungbean varieties between growing in monocrop and growing together with red rice in aerobic irrigation system, by carrying out pot experiment in a plastic house located in Dasan Tebu village of Kediri District, in West Lombok, from May to September 2017. The experiment was designed according to the Completely Randomized Design (CRD) with three replications and two treatment factors arranged factorially, namely mungbean varieties (varieties of No.129, Merak, Vima-3, Vima-1, and Kenari) and planting patterns (in monocrop and growing together with rice). Data were analyzed with analysis of variance (ANOVA) and Honestly Significant Difference test (Tukey’s HSD) at 5% level of significance using the statistical software CoStat for Windows ver. 6.303. The results showed that there were different responses between several mungbean varieties to growing it together with red rice in relation to growth and yield components of mungbean. The mungbean variety No.129 showed higher seed yields when grown together with red rice (11.78 g/pot), whereas seed yield of the Vima-1 variety was lower (i.e. only 6.5 g/pot) and lowest when grown together with red rice plants compared with growing on the monocrop system (9.32 g/pot), while the Vima-3 variety showed non-significant differences in seed yields between growing together with red rice (11.66 g/pot) and growing in monocrop systems (10.09 g/pot). Therefore field testing experiments are required to find more tolerant mungbean varieties for planting together with rice plants in an intercropping system.
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Dambreville, Anaëlle, Mélanie Griolet, Gaëlle Rolland, Myriam Dauzat, Alexis Bédiée, Crispulo Balsera, Bertrand Muller, Denis Vile, and Christine Granier. "Phenotyping oilseed rape growth-related traits and their responses to water deficit: the disturbing pot size effect." Functional Plant Biology 44, no. 1 (2017): 35. http://dx.doi.org/10.1071/fp16036.
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Following the recent development of high-throughput phenotyping platforms for plant research, the number of individual plants grown together in a same experiment has raised, sometimes at the expense of pot size. However, root restriction in excessively small pots affects plant growth and carbon partitioning, and may interact with other stresses targeted in these experiments. In work reported here, we investigated the interactive effects of pot size and soil water deficit on multiple growth-related traits from the cellular to the whole-plant scale in oilseed rape (Brassica napus L.). The effects of pot size on responses to water deficit and allometric relationships revealed strong, multilevel interactions between pot size and watering regime. Notably, water deficit increased the root : shoot ratio in large pots, but not in small pots. At the cellular scale, water deficit decreased epidermal leaf cell area in large pots, but not in small pots. These results were consistent with changes in the level of endoreduplication factor in leaf cells. Our study illustrates the disturbing interaction of pot size with water deficit and raises the need to carefully consider this factor in the frame of the current development of high-throughput phenotyping experiments.
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Menegaes, Janine Farias, Fernanda Alice Antonello Londero Backes, Rogério Antonio Bellé, and Túlio Eduardo de Seixas Peres. "Enraizamento de estacas e produção de Euryops chrysanthemoides (DC.) B. Nord. em vaso." Ornamental Horticulture 21, no. 3 (February 12, 2016): 382. http://dx.doi.org/10.14295/oh.v21i3.732.
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The experiments were performed at the Department of Floriculture of UFSM from August 2013 to May 2014 in two experimental phases. The first experiment aimed to verify rooting Euryops chrysanthemoides in different concentrations of IBA, in a randomized block design, evaluated the number and length of roots. In the second experiment the different plant densities of E. chrysanthemoides pot (1, 2, 3 or 4 plants) in a completely randomized design and analyzed for the number of branches, number of buttons, number of open flowers and drought were evaluated, the average height of the branches, the middle notes of floral stems and closing the height of the vase. Observed a greater number and length of roots in 1.000 mg L-1 IBA. The density of four plants per pot is recommended to number 15.
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Ditmarová, Ľ., J. Kmeť, M. Ježík, and J. Váľka. "Mineral nutrition in relation to the Norway spruce forest decline in the region Horny Spis (Northern Slovakia)." Journal of Forest Science 53, No. 3 (January 7, 2008): 93–100. http://dx.doi.org/10.17221/2148-jfs.
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In this contribution we present the results of analyses of selected mineral nutrients in assimilatory tissues of spruce trees at different developmental phases (plants, adult trees) in the region Horný Spiš. The very close connection between mineral nutrient cycling and other physiological processes in the plants has been well recognised. The presented analyses of mineral nutrient cycling were done within comprehensive eco-physiological research assessing the physiology and health status of spruce stands in the study area. The research was conducted directly in the stand (Hliníky locality, Horný Spiš − two research plots: 1. plot with spruce stand in advanced decline, 2. control plot − without visible decline symptoms) and, at the same time as a pot experiment. The objective of the pot experiment was to verify the supposed negative influence of soil environment (in the locality with advanced decline of spruce stands) on the growth of spruce trees and their mineral nutrient conditions. The analyses of the material sampled from the stands revealed high amounts of manganese (MnT) that were in the toxicity range on both examined plots. Another negative finding was high amounts of toxic aluminium, primarily in needles of adult trees growing on the plot with symptoms of acute stand decline. This reflects a very low value of pH/H<sub>2</sub>O − 3.7 (pH/KCl − 3 to 2.8) and total exhaustion of the soil suffering, moreover, from the lack of soil water. As for the differences in amounts of individual macronutrients between the plot with intensive decline and the control plot, no significant differences were found, with the exception of Fe. On the other hand, evident significant differences in risk elements Pb, Hg and Al were found. As for the differences in nutrient contents in spruce seedlings in the pot experiment (variants 1 to 6), we can see significant differences in macronutrient contents (N, P, Ca, K, Mn), in some cases also in risk element contents (Al).
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Yli-Halla, Markku. "Phosphorus supplying capacities of soils previously fertilized with different rates of P." Agricultural and Food Science 63, no. 2 (April 1, 1991): 75–83. http://dx.doi.org/10.23986/afsci.72395.
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The residual effect of repeated P fertilizer applications was studied in a material of 30 silty clay soil samples collected from an 11-year field experiment in which a total of 0, 154, 309, 541 or 696 kg P/ha had been applied in annual doses. Half of the experiment had been limed twice with CaCO3 (10 tons/ha). In a pot experiment, six yields of Italian ryegrass were grown in soils taken from each plot, and the P uptake by the grass was determined. Soil P was extracted with water (Pw) and 0.5 M ammonium acetate-0.5 M acetic acid at pH 4.65 (PAAAC)- Reversibly adsorbed P (Pi) was extracted by a new method in which P desorbing from the soil was collected in strips of filter paper impregnated with iron hydroxide. P uptake by pot-grown grass from soils fertilized with increasing rates of P in the field corresponded to 30, 72, 100 and 112 kg larger quantities of P per hectare, compared to the soil not receiving P in the field experiment. The apparent utilization of residual fertilizer P ranged from 16 % to 25 %. The reserve of potentially desorbable P in soil had been affected much more by the fertilizer applications than had P uptake by crops in the field. The ability of the three extraction methods (Pw, Pi, PAAAC) to predict P uptake by pot-grown ryegrass was discussed. The Pi method appeared to be well suited for assessment of potentially available P reserves both in limed and unlimed soils.
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Cushman, Lisa Chen, H. Brent Pemberton, J. Creighton Miller, and John W. Kelly. "Interactions of Flower Stage, Cultivar, and Shipping Temperature and Duration Affect Pot Rose Performance." HortScience 33, no. 4 (July 1998): 736–40. http://dx.doi.org/10.21273/hortsci.33.4.736.
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Simulated shipping (storage) experiments were conducted to determine the effects of shipping temperature and duration on flower longevity and leaf abscission of pot rose Rosa L. `Meijikatar' (= Orange Sunblaze) and `Meirutral' (= Red Sunblaze). In addition, three flower stages (1 = tight bud, calyx not reflexing; 2 = showing color, calyx reflexing, no petals reflexed; 3 = full color, petals beginning to reflex, traditional bud stage) were selected immediately prior to storing plants at 4, 16, or 28 °C for 2, 4, or 6 days. The experiment was conducted during the summer and repeated during the winter. Evaluations were made in an interior environment at 21 °C for both experiments. `Meirutral' exhibited longer poststorage longevity and less leaf abscission than `Meijikatar' in both experiments. Flowers of both cultivars advanced by about one stage during storage at temperatures greater than 4 °C in summer, but developed more slowly in winter. Results from both experiments showed that plants stored at 4 °C had the longest poststorage floral longevity, the best flower quality, and the least leaf abscission, regardless of cultivar, storage duration, or flower stage at the beginning of storage. For plants stored at 16 °C, floral longevity decreased and leaf abscission increased when the duration was longer than 4 days. At 28 °C, flower longevity decreased and leaf abscission increased, especially at durations longer than 2 days. In the winter experiment, there was no leaf abscission on plants placed in the dark at 21 °C and watered during storage treatments lasting up to 6 days. In the summer experiment, the younger the flower, the more it was negatively affected by high storage temperature. Overall, poststorage floral longevity was longer in the summer than the winter experiment.
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Chen, Jing Jing, Hui Wang, and Chuan Fang Zhu. "Preparation and Characterization of Several Latent Curing Agents for Epoxy Acrylate Resins." Applied Mechanics and Materials 278-280 (January 2013): 397–400. http://dx.doi.org/10.4028/www.scientific.net/amm.278-280.397.
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In this paper, novel latent curing agents for epoxy acrylic resin a~e were synthesized and characterized with 1H NMR and MS in this study. Pot life of epoxy acrylic resins containing 3wt.% a~e or γ-aminopropyltrithoxysilane was compared in this paper and experiment data indicated that a~e were inactive in epoxy acrylic resin at room temperature. Curing temperature for double compositions resin is about 120°C and pot life at room temperature is longer than 6 months. The optimal curing condition for these curing agents were selected through several experiments.
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Marutani, Mari, Joseph Tuquero, Robert Schlub, and James McConnell. "(185) Response of Vegetable Crops to Mycorrhizal Inoculation in a Calcareous Soil in the Tropics." HortScience 40, no. 4 (July 2005): 1000C—1000. http://dx.doi.org/10.21273/hortsci.40.4.1000c.
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The effects of a vesicular–arbuscular mycorrhizal fungus, Glomus aggregatum inoculation were examined on growth of vegetable crops in pot culture and field experiments with Guam cobbly clay loam soil (clayey, gibbsitic, nonacid, isohyperthermic Lithic Ustorthents). In pot experiments, the growth response of yard-long beans (Vigna unguiculata subs. sesquipendalis), sweet corn (Zea mays), watermelon (Citrullus lanatus), cucumber (Cucumis sativus), okra (Abelmoschus esculentus), green onion (Allium fistulosum), eggplant (Solanum melongena), and papaya (Carica papaya) were significantly improved with mycorrhizal inoculation. A pot experiment was also conducted to evaluate effects of G. aggregatum inoculation on the growth of corn seedlings at four different water regimes. Seedlings inoculated with G. aggregatum significantly improved the plant growth and the mineral uptake at all levels of water treatments. In the first field trial, prior to seed sowing the media in seedling trays were either inoculated or not inoculated with G. aggregatum. Treated watermelon and eggplant seedlings were transplanted in field. It was found that inoculating seedlings did not improve the harvest yield of two fruit-bearing crops. The second field experiment was conducted to study G. aggregatum inoculation and different levels of inorganic fertilizer application on growth of corn. Mycorrhizal colonization had positive effects on corn development and uptake of some minerals such as Fe. Experiments in the study suggested potential uses of a mycorrhizal fungus in an alkaline soil in the tropics.
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Renčo, M., N. Sasanelli, I. Papajová, and L. Maistrello. "Nematicidal effect of chestnut tannin solutions on the potato cyst nematode Globodera rostochiensis (Woll.) Barhens." Helminthologia 49, no. 2 (June 1, 2012): 108–14. http://dx.doi.org/10.2478/s11687-012-0022-1.
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AbstractRecently, tannins have been reported for their nematicidal activity against the root-knot nematode Meloidogyne javanica both in vitro and in pot experiments in addition to a biocidal effect on a wide range of fungi, bacteria and yeasts. However, no information is available on the effect of these polyphenols on plant parasitic cyst nematodes. Therefore, an in vitro and a pot experiments on potato were undertaken to investigate the nematicidal activity of tannin aqueous solutions at different concentrations on the potato cyst nematode Globodera rostochiensis. In the in vitro experiment different tannin concentrations in a geometric scale (from 0.32 to 20.48 g/l) were tested for their effect on the egg hatch of the nematode. All tested tannin concentrations were effective to reduce egg viability from 56 to 87%, in comparison to the untreated control. In the pot experiment, tannins, as aqueous solutions at rates of 100, 250 and 450 g/m2, were applied to soil at two different application times (at sowing and at sowing and two weeks later). All tested doses were effective to reduce the number of cyst/100 g soil, eggs and juveniles/g soil and reproduction rate in comparison to untreated control. The number of eggs and juveniles/cyst was not influenced by the different applied rates of tannins.
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Krug, Brian A., Brian E. Whipker, Ingram McCall, and John M. Dole. "Narcissus Response to Plant Growth Regulators." HortTechnology 16, no. 1 (January 2006): 129–32. http://dx.doi.org/10.21273/horttech.16.1.0129.
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Three experiments were conducted to determine the effectiveness of plant growth regulators (PGRs) on `Tete a Tete', `Dutch Master', and `Sweetness' narcissus (Narcissus pseudonarcissus). Ethephon foliar sprays (500 to 2500 mg·L-1) and substrate drenches of flurprimidol and paclobutrazol (0.25 to 4 mg/pot a.i.) did not control height during greenhouse forcing of `Tete a Tete' at any concentration trialed. Stem stretch was controlled during postharvest evaluation with ethephon foliar sprays ≥1000 mg·L-1, flurprimidol substrate drenches ≥0.5 mg/pot a.i., and paclobutrazol substrate drenches of 4 mg/pot a.i. A second experiment investigated preplant bulb soaks of flurprimidol (10 to 40 mg·L-1) applied to `Dutch Master' and `Tete a Tete' narcissus bulbs. Flurprimidol preplant bulb soaks controlled postharvest stretch on `Tete a Tete' and `Dutch Master' at concentrations ≥15 and ≥10 mg·L-1, respectively. A third experiment was conducted with paclobutrazol (75 to 375 mg·L-1) on `Tete a Tete' and `Dutch Master' and three concentrations of flurprimidol on `Sweetness' to determine optimal soak recommendations. Paclobutrazol preplant bulb soaks ≥75 mg·L-1 controlled postharvest stretch of `Tete a Tete' and `Dutch Master', while 37.5 mg·L-1 of flurprimidol controlled postharvest stretch of `Sweetness'. Based on the results of these experiments, growers can now select a PGR to help control excessive plant growth.
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Zimmer, Dana, Kerstin Panten, Marcus Frank, Armin Springer, and Peter Leinweber. "Sulfur-Enriched Bone Char as Alternative P Fertilizer: Spectroscopic, Wet Chemical, and Yield Response Evaluation." Agriculture 9, no. 1 (January 14, 2019): 21. http://dx.doi.org/10.3390/agriculture9010021.
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Phosphorus- (P) rich bone char (BC) could be an alternative P fertilizer in sustainable agriculture; however, it has a low P solubility. Therefore, sulfur-enriched BC (BCplus) was tested for chemical composition and fertilization effects in a pot experiment. In BCplus sulfur, concentrations increased from <0.1% to 27% and pH decreased from 8.6 to 5.0. These modifications did not change P solubility in water, neutral ammonium citrate, and citric acid. A pot experiment with annual rye grass (Lolium multiflorum L.) and treatments without P (P0), BC, BCplus and triple superphosphate (TSP) was set up. The cumulative dry matter yield of the BC treatment was similar to P0, and that of BCplus similar to TSP. The plant P uptake was in the order P0 = BC < BCplus < TSP. Consequently, the apparent nutrient recovery efficiency differed significantly between BC (<3%), BCplus (10% to 15%), and TSP (>18%). The tested equilibrium extractions, regularly used to classify mineral P-fertilizers, failed to predict differences in plant yield and P uptake. Therefore, non-equilibrium extraction methods should be tested in combination with pot experiments. Additionally, particle-plant root scale analyses and long-term experiments are necessary to gain insights into fertilizer-plant interactions.
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Khan, Md Sirajul Islam, Md Abdul Kaium, Bittam Kumar Sarkar, Rokeya Begum, Noorjahan Begum, Mohammed Ariful Islam, Md Tazul Islam Chowdhury, Marzia Habib, and Md Abdul Hakim. "Potencies of Justicia adhatoda L. for its possible phytotoxic activity." Plant Science Today 8, no. 2 (April 1, 2021): 289–92. http://dx.doi.org/10.14719/pst.2021.8.2.1044.
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The phytotoxic effects of Justicia adhatoda L. were investigated on cauliflower, broccoli, tomato, foxtail millet and barnyard grass. The experiments were carried out under laboratory and in pot experiments. Six different aqueous methanol extract concentrations (control, 0.001, 0.003, 0.01, 0.03 and 0.1 g DW equivalent mL-1 extract) were tested in the laboratory and six aqueous extract concentrations (control, 1.0, 2.0, 3.0, 4.0 and 5.0 g DW mL-1 extract equivalent) were evaluated in the pot experiment. Results showed a reduction in germination and growth (shoot length, root length and biomass weight) at higher extract concentration compared to control. The leaf extracts from J. adhatoda showed that the foxtail millet and barnyard grass are germinating below 50 % both in the laboratory condition and in the pot experiment at their maximum concentration. When maximum extracts have been applied, we have found less than 0.5 cm of shoot and root of foxtail millet and barnyard grass. Maximum dry weight reduction was observed in foxtail millet and barnyard grass at the same concentration. The findings show that J. adhatoda may have phytotoxic potential and thus contains phytotoxins. Therefore, J. adhatoda can be used in sustainable crop production as a mulch or soil additive to suppress weeds.
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Yao, Huanli, Xian Chen, Junying Yang, Jihong Li, Jiale Hong, Yueming Hu, and Xiaoyun Mao. "Effects and Mechanisms of Phosphate Activation in Paddy Soil by Phosphorus Activators." Sustainability 12, no. 9 (May 11, 2020): 3917. http://dx.doi.org/10.3390/su12093917.
Full textAbstract:
Phosphorus (P) build-up in agricultural soils as a consequence of excessive P fertilizer application necessitates the exploration of soil P pool for crop supply. We conducted a soil incubation experiment, pot experiments, and field experiments to study the effects of different P activators (Pas) (humic acid, lignosulfonate sodium, and biochemical humic acid) on soil phosphate fraction, rice yield, and P loss. Through chemical analyses and microbial community structure measurement, we found that Pas significantly increased paddy soil water-soluble P (WSP), available P, Fe-P, and relative abundances of P-mineralizing and P-solubilizing microorganisms, whereas they decreased Al-P and microbial alpha diversity. Our pot experiment results showed that the application of Pas significantly reduced soil P loss and resulted in grain yield comparable to those obtained by fertilization with P fertilizers, and significantly higher than those in the control plants. The results of the field experiment suggested that Pas are able to increase rice yield more significantly than P fertilizers and improve the P utilization efficiency of rice plants. We conclude that application of Pas was more effective in reducing P leaching, soil total P, WSP, and Olsen P than P fertilizers during rice harvest.
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Dmuchowski, Wojciech, Aneta Baczewska-Dąbrowska, Dariusz Gozdowski, Paulina Brągoszewska, Barbara Gworek, Irena Suwara, Tadeusz Chojnacki, Adam Jóźwiak, and Ewa Swiezewska. "Effect of salt stress in urban conditions on two Acer species with different sensitivity." PeerJ 9 (January 28, 2021): e10577. http://dx.doi.org/10.7717/peerj.10577.
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Background The benefits of trees in urban areas include the following: an increase in ecosystem health, an increase in human health, the mitigation of the effects of heat and drought at microclimate level, the storage and sequestration of carbon, and a reduction in air pollution and noise. These ecosystem services can be provided only by trees that are in good health. The main cause of salt stress in urban environments is the use of de-icing salts on the streets in winter. Salt stress is a complex process that includes changes in plants on the physiological, histological, cellular and molecular levels, leading to limitations in nutrient uptake, disrupting the ionic balance of trees and resulting in the death of roadside trees. In response to salinity, trees have developed a variety of defence mechanisms that allow them to minimize the effects of stress and maintain homeostasis. Methodology The reactions of two species Acer species: A. platanoides and A. campestre, which have different sensitivities to the unfavourable conditions of the urban environments (mainly salt stress), were investigated. The research included two experiments: a field experiment with city trees and a controlled pot experiment with young trees treated with increasing doses of salt. In both experiments, the following were performed: an assessment of the health condition of the trees and the content of macroelements as well as the Cl and Na in leaves and a qualitative and quantitative analysis of polyprenols. Results A. campestre had a more specific strategy than A. platanoides for dealing with Na and Cl, which resulted in undamaged leaves. Under the same conditions, A. platanoides leaves contained more Cl and Na and were severely damaged. The disruption of the ion balance due to salt stress was lower in A. campestre than in A. platanoides. Compared with A. platanoides, A. campestre synthesized more polyprenols in the field experiment. This ability was acquired during the process of acclimation, because it occurred only in the mature trees in the field experiment and not in the young trees in the pot experiment. Conclusions The use of two experimental methods (i.e., the field and pot experiments) allowed for a more complete assessment of tree strategies to mitigate salt stress. A. campestre displayed a more specific strategy than A. platanoides. This strategy was based on several elements. A. campestre limited Cl and Na transport to the leaves, which resulted in a lack of damage to those organs. Under the same conditions, A. platanoides individuals contained more Cl and Na in their leaves and were seriously damaged. A. campestre synthesized larger amounts of polyprenols, which probably have the ability to mitigate salt stress. This ability was acquired during the process of acclimation, because it occurred only in the mature trees in the field experiment and was not observed in the young trees in the pot experiment.
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Rauf, S., H. A. Sadaqat, I. A. Khan, and R. Ahmed. "Genetic analysis of leaf hydraulics in sunflower (Helianthus annuus L.) under drought stress." Plant, Soil and Environment 55, No. 2 (February 24, 2009): 62–69. http://dx.doi.org/10.17221/260-pse.
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Improvement in leaf hydraulics is directly related to the improvement of plant tolerance to drought stress. Therefore, a field and pot experiment was carried out to determine the type of genetic variability and selection of parental types on the basis of combining ability for leaf hydraulics. Genotypes showed similar performance in both experiments; higher values were shown by drought tolerant genotypes in all traits except for osmotic potential, which drought tolerant genotypes maintained lower. Osmotic adjustment in pot experiment showed the highest magnitude of additive type of genetic variability. Female showed a higher and significant contribution of general combining ability effects as compared to male; it suggests that within genotypes female rather than male mostly contribute for additive genes. AMES-10103 showed the highest general combining ability effects for traits such as turgor pressure and osmotic adjustment.
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Khabibullin, Marat. "Recent results from the T2K experiment." EPJ Web of Conferences 191 (2018): 03001. http://dx.doi.org/10.1051/epjconf/201819103001.
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Recent results of the analysis of 2:23×1021 POT data collected by the T2K long-baseline neutrino accelerator experiment are presented in this paper. It is shown that T2K is able to constrain the CP-violating phase δCP in the lepton sector with 2σ significance. Nearest plans for improving the sensitivity to δCP are also given.
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Ardakani, Abbas Salahi. "Toxicity of silver, titanium and silicon nanoparticles on the root-knot nematode, Meloidogyne incognita, and growth parameters of tomato." Nematology 15, no. 6 (2013): 671–77. http://dx.doi.org/10.1163/15685411-00002710.
Full textAbstract:
The toxicity of three nanoparticles, silver (AgNP, 20 nm), silicon oxide (SiO2NP, 11-14 nm) and titanium oxide (TiO2NP, 20 nm), to the root-knot nematode, Meloidogyne incognita, was studied in laboratory and pot experiments. Application rates of all nanoparticles were 1.5, 3, 6, 12.5, 25, 50, 100, 200, 400 and 800 mg nanoparticles (ml water)−1 for laboratory experiment to determine their effects on motility and mortality of second-stage juveniles (J2). In pot experiment, 0.02, 0.01, 0.005, 0.0025, 0.00125 and 0.0007% (w/w) of nano-silver and nano-titanium were applied to examine effects on nematode activity and plant growth components of tomato (Solanum lycopersicum). Results showed 100% J2 immobility and mortality in treatments of 800, 400 and 200 mg ml−1 of AgNP; the LC50 for AgNP was 100 mg ml−1. J2 mortality was 48, 16 and 7.3% in 100, 50 and 25 mg ml−1 of AgNP, respectively. J2 mortality was 4.3 and 2% in 800 and 400 mg ml−1 of TiO2NP, respectively. No J2 mortality was seen in all other treatments after 24 h exposure. In a pot experiment, all treatments of AgNP and 0.02% TiO2NP completely controlled M. incognita. Treatments of 0.02, 0.01 and 0.005% of AgNP as well as 0.02% of TiO2NP were toxic to tomato plants and significantly reduced tomato root and stem length and fresh weights in comparison to control.
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KOZIEŁ, MONIKA, BARBARA GĘBALA, and STEFAN MARTYNIUK. "Response of Soybean to Seed Inoculation with Bradyrhizobium japonicum and with Mixed Inoculants of B. japonicum and Azotobacter chroococcum." Polish Journal of Microbiology 62, no. 4 (2013): 457–60. http://dx.doi.org/10.33073/pjm-2013-063.
Full textAbstract:
Effects of pre-sowing soybean seed inoculation with Bradyrhizobium japonicum alone or with mixed inoculants containing soybean rhizobia and Azotobacter chroococcum were compared. In the pot experiment all the tested strains of soybean rhizobia in pure cultures or in mixtures with A. chroococcum significantly improved nodulation of soybean plants and seed yields of this crop. In micro-plot experiments pre-sowing soybean seeds treatment with the inoculant containing the most effective strain 94P of B. japonicum alone or with the mixed inoculant of strain 94P and A. chroococcum were equally effective in improving nodulation intensity and seed yields of soybean in comparison to the uninoculated soybean.
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Mekonnen, L. "Effects of water stress applied at different phenological phases of chickpea (Cicer arietinum L.)." International Journal of Agricultural Research, Innovation and Technology 10, no. 1 (July 7, 2020): 13–21. http://dx.doi.org/10.3329/ijarit.v10i1.48089.
Full textAbstract:
A pot experiment was conducted to evaluate the response of two chickpea varieties to water stress at the College of Agriculture campus, Hawassa University under greenhouse from January to June 2017. Three water stress levels i.e. without stress (control), vegetative water stress and seed filling water stress were assigned as main plot, chickpea varieties Habru (Kabuli type) and Mastewal (Desi type). The treatments were laid in split plot design with four replications. The results showed that water stress significantly affected all parameters studied in this experiment. The seed filling water stress resulted greater reductions in the value of all tested parameters studied compared to optimum watering and vegetative stress except number of primary branches and harvesting index, which were significantly lower under vegetative water stress. As well, the two varieties significantly differed for all observed parameters except number of nodules per plant and nodule dry weight. Days to flowering, pod maturity, number of pods per plant, number of seeds per pod and harvest index were significantly higher for Mastewal variety while, plant height, number of primary branches, number of secondary branches, dry biomass, seed yield per plant, hundred seed weight and root dry weight were greater for Habru variety. Days to flowering, plant height, seed yield per plant, hundred seed weight, number of pods per plant and harvest index were significantly affected (p<0.05) due to all two way interactions. Water management schemes that ensure to avoid especially terminal water stress could help to maintain chickpea production, which is usually grown with residual moisture by the majority of Ethiopian farmers. Given the fact that the results are obtained from a pot experiment there is a need to substantiate the findings with field experiments conducted under contrasting moisture environments.
Int. J. Agril. Res. Innov. Tech. 10(1): 13-21, June 2020
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Conover, C. A., and L. N. Satterthwaite. "Paclobutrazol Optimizes Leaf Size, Vine Length and Plant Grade of Golden Pothos (Epipremnum aureum) on Totems." Journal of Environmental Horticulture 14, no. 1 (March 1, 1996): 44–46. http://dx.doi.org/10.24266/0738-2898-14.1.44.
Full textAbstract:
Abstract Two experiments were conducted to determine a Bonzi (0.4% paclobutrazol) rate that would optimize leaf size, vine length and plant quality of golden pothos [Epipremnum aureum (Linden & André) Bunt.] on totem poles in 20 cm (3.4 liter) pots. In Experiment 1, six rooted pothos cuttings were transplanted around a totem and fertilized with 10 g of 19N–2.6P–10K (0.35 oz 19–6–12) Osmocote. After one week, each pot was treated with a 250 ml (8.5 fl oz) drench of water containing Bonzi at 0, 4, 8, 12, or 16 mg a.i. (paclobutrazol). Four mg of paclobutrazol per pot yielded the most desirable plants, based on average leaf size, vine length and plant grade. Experiment 2 was designed to refine the paclobutrazol application rate. Ten rooted cuttings of pothos were transplanted around a totem and fertilized at 10 g 19N–2.6P–10K (19–6–12) Osmocote. After one week, each pot was treated with a 100 ml drench of water containing paclobutrazol at 0, 1.3, 2.6, 4.0, 5.3, 6.6, or 7.9 mg. Paclobutrazol applied at a rate of 5.3 mg produced optimum leaf size and vine length and highest plant grades.
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Barroso, Petra Martínez, Magdalena Daria Vaverková, and Jakub Elbl. "Assessing the Ecotoxicity of Soil Affected by Wildfire." Environments 8, no. 1 (January 7, 2021): 3. http://dx.doi.org/10.3390/environments8010003.
Full textAbstract:
This study was carried out to assess the ecotoxicity of soil affected by wildfire using two laboratory toxicity tests, and to investigate the possibility of application of selected soil amendment into the burnt soil in order to improve its properties for faster post-fire reclamation. A phytotoxicity test is a fast-indicative test for revealing acute toxicity and was performed on quickly growing plant species Sinapis alba L. and Lepidium sativum L., while a pot experiment is a standardized toxicity test with a longer experiment duration and was carried out with Lolium perenne L., Festuca rubra L., Brassica juncea L. Diatomite, bentonite, compost, and biochar were supplemented to the soil. Regarding the phytotoxicity test only 3% w/w of biochar stimulated the growth of Lepidium sativum L. Pot experiment confirmed that effect of soil application amendments on biomass yield is more significant than the plant species. The average highest biomass yields were achieved in treatments with bentonite and diatomite. Subsequent research should focus on investigating possible combinations of soil amendments for burnt soil reclamation and complementing the experiments with chemical analysis.
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Barroso, Petra Martínez, Magdalena Daria Vaverková, and Jakub Elbl. "Assessing the Ecotoxicity of Soil Affected by Wildfire." Environments 8, no. 1 (January 7, 2021): 3. http://dx.doi.org/10.3390/environments8010003.
Full textAbstract:
This study was carried out to assess the ecotoxicity of soil affected by wildfire using two laboratory toxicity tests, and to investigate the possibility of application of selected soil amendment into the burnt soil in order to improve its properties for faster post-fire reclamation. A phytotoxicity test is a fast-indicative test for revealing acute toxicity and was performed on quickly growing plant species Sinapis alba L. and Lepidium sativum L., while a pot experiment is a standardized toxicity test with a longer experiment duration and was carried out with Lolium perenne L., Festuca rubra L., Brassica juncea L. Diatomite, bentonite, compost, and biochar were supplemented to the soil. Regarding the phytotoxicity test only 3% w/w of biochar stimulated the growth of Lepidium sativum L. Pot experiment confirmed that effect of soil application amendments on biomass yield is more significant than the plant species. The average highest biomass yields were achieved in treatments with bentonite and diatomite. Subsequent research should focus on investigating possible combinations of soil amendments for burnt soil reclamation and complementing the experiments with chemical analysis.
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Huang, Lijuan, Hans Chr Bruun Hansen, Huihui Wang, Jing Mu, Zijian Xie, Lifang Zheng, and Zhengyi Hu. "Effects of sulfate on cadmium uptake in wheat grown in paddy soil – pot experiment." Plant, Soil and Environment 65, No. 12 (December 19, 2019): 602–8. http://dx.doi.org/10.17221/558/2019-pse.
Full textAbstract:
Rice-wheat rotation is common in China. Cadmium (Cd) and sulfur (S) are added to rice fields through various activities. The sulfur amendment has been recommended to control the uptake of Cd in rice. However, the effect of S on Cd uptake in winter wheat cultivated in paddy soil is rarely reported. A greenhouse pot experiment including two Cd levels (0, 10 mg Cd/kg, as CdCl<sub>2</sub>) combined with three S rates (0, 30, 60 mg S/kg, as Na<sub>2</sub>SO<sub>4</sub>) was performed to investigate the effect of S application on uptake and allocation of Cd in wheat cultivated in paddy soil. Cadmium concentrations in wheat grain significantly (P < 0.05) increased by 37% at 30 mg S/kg, and the percentage of Cd allocation to grain significantly (P < 0.05) increased by 7% at 60 mg S/kg compared with non-S addition treatment when wheat was grown in Cd-added soil. For the low Cd soil, a similar trend was seen, but Cd increases were insignificant for grain while significant (P < 0.05) for root at 60 mg S/kg. In conclusion, S fertiliser may promote Cd accumulation in wheat grain and should be considered when it is used for wheat in paddy soils.
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Vestberg, Mauritz, Hanna Palmujoki, Päivi Parikka, and Marjatta Uosukainen. "Effect of arbuscular mycorrhizas on crown rot (Phytophthora cactorum) in micropropagated strawberry plants." Agricultural and Food Science 3, no. 3 (May 1, 1994): 289–95. http://dx.doi.org/10.23986/afsci.72707.
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Preliminary studies were conducted on the effect of arbuscular mycorrhizal fungi (AMF) against strawberry crown rot caused by Phytophthora cactorum (Leb. & Cohn) Schroet. A micropropagated strawberry cultivar susceptible to the disease, ‘Jonsok’, was either inoculated with the Finnish AMF strains Glomus mosseae (Nicol. & Gerd.) Gerdemann & Trappe V57, G. hoi Berch & Trappe V98 and G. fistulosum Skou & Jakobson V128, or it was left uninoculated. AMF inoculation at the beginning of the weaning stage, five weeks before the establishment of the pot or field experiment, did not decrease crown rot severity in either of the experiments. In the pot experiment, on the contrary, AMF lowered the plant health index when P. cactorum was added to the substrate in the form of infected plant residues. Results are discussed in relation to soil-borne vs. foliar disease, phosphorus concentration of the growth substrate and influence of weather conditions.
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Young, Roy E., and Gary R. Bachman. "Temperature Distribution in Large, Pot-in-Pot Nursery Containers." Journal of Environmental Horticulture 14, no. 4 (December 1, 1996): 170–76. http://dx.doi.org/10.24266/0738-2898-14.4.170.
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Abstract Container-grown landscape plants in the Mid-Atlantic and Southern states are exposed to wide, rapid fluctuations of temperatures, particularly during winter. Thermocouples were placed at three depths and four orientations in the soil mix of 2-year-old, Foster' hybrid holly (Ilex × attenuata ‘Fosteri’) to monitor temperature profiles of 57 liter (nominal 15 gal) containers. These containers were grown conventionally under three treatments: on a bare ground surface (control), inside plastic-film-covered hoop houses, and in the pot-in-pot (PIP) configuration below the ground surface. Temperatures were monitored during both the coldest and the warmest periods of the year in the Moncks Comer, SC, area. In the coldest period, soil temperatures averaged among depths and orientations were 3.6C (6.5F) warmer in the hoop houses than in the control, and 1.1C (2F) warmer in the PIP system than in the control. Although colder than the hoop houses, the average temperatures of the PIP container dropped below 0C (32F) only in the upper 7.6 cm (3 in). Below freezing averages were observed in the control containers, however, in all positions except the center. In the warmest period, the hoop houses were uncovered, becoming additional data points of the control treatments. The PIP system kept overall average soil temperatures 3.3C (6F) cooler than in control containers. Upon conclusion of the experiment, new (beyond transplanted root ball) root dry weights were significantly greater for PIP containers than for control containers.
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Mercik, Stanisław, Wojciech Stępień, and Teresa Mercik. "The effect of saturation of the soil absorbing complex with cations on the yield and chemical composition of grasses." Acta Agrobotanica 40, no. 1-2 (2013): 73–86. http://dx.doi.org/10.5586/aa.1987.009.
Full textAbstract:
Three year long pot experiments using medium sand were conducted with a Italian ryegrass, <i>Lolium multiflorum</i>. Two year pot experiments were also done on medium soil with meadow fescue, <i>Festuca pratensis</i>. Before the experiment was begun, the absorbing complexes of these soils were saturated with cations to very different degrees. The results of these experiments showed that the degree of saturation of the absorbing complexes with potassium and magnesium should increase as the size of the complex decreases. Increasing doses of potassium significantly widened the K : (Ca + Mg) ratio in grasses and lowered their quality, while Ca and Mg slightly narrowed this ratio. However, it was not wider than the acceptable ratio, even with the highest K doses.
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Singh, Inderpal, H. S. Thind, Sandeep Sharma, Yadvinder Singh, and Mohammad Amin Bhat. "Phosphorus fertilizing potential of biomass ashes and their effect on bioavailability of micronutrients in wheat (Triticum aestivum. L)." Journal of Applied and Natural Science 9, no. 2 (June 1, 2017): 744–53. http://dx.doi.org/10.31018/jans.v9i2.1267.
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Ashes from agricultural biomass in agro-based industries have been found to have most of the plant nutrients except nitrogen and sulphur but are treated as waste material. The present study was conducted to evaluate the potential of biomass ashes as source of P and their effect on bioavailability of micronutrients in wheat crop. We conducted the pot experiment at glass house of the Department of Soil Science, Punjab Agricultural University, Ludhiana, India. The experiment consisted of combinations of four P sources [bagasse ash (BA), rice husk ash (RHA), rice straw ash (RSA), fertilizer P (Fert-P)] supplying P at three levels (10, 20 and 30 µg g-1) along with one zero-P control. This experiment was laid out in completely randomized design (CRD) having three replications. Application of P through RSA produced significantly higher grain yield (14.3 g pot-1) than BA (12.8 g pot-1) and RHA (12.9 g pot-1) but statistically at par with Fert-P (13.5 g pot-1). Grain Zn content decreased maximum than other micronutrients with application of P from all sources, hence maximum increased P/Zn ratio. Phosphorus applied from all the biomass ashes significantly increased biomass and yield over control. With increase in P application, micronutrients content in grain was significantly decreased, hence decreased bioavailability of micronutrients in wheat grain.
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Conover, C. A., and R. T. Poole. "Effect of Fertilizer and Irrigation on Leachate Levels of NH4-N, NO3-N, and P in Container Production of Nephrolepis exaltata ‘Fluffy Ruffle’." Journal of Environmental Horticulture 10, no. 4 (December 1, 1992): 238–41. http://dx.doi.org/10.24266/0738-2898-10.4.238.
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Abstract Nitrogen leaching into surficial aquifers continues to become more of a problem in several areas of the U.S., and thus potential for regulation of foliage plant producers is increasing. A factorial experiment evaluated liquid and controlled-release fertilizer sources at three irrigation levels [100, 200, or 300 ml (3.4, 6.8, or 10.2 oz) per 15 cm (6 in) pot twice weekly] for NH4-N, NO3-N, and P in leachate. Samples were collected weekly for 12 weeks beginning the last week of September. Plant grade and top fresh weights were similar for all treatments, but large variations occurred in NH4-N, NO3-N, and P levels in leachate due to irrigation level. Increasing irrigation level above 100 ml (3.4 oz) twice weekly resulted in increases of NO3-N present in leachate, with levels as high as 126 mg/pot observed toward the end of November. NH4-N levels were affected by irrigation during the first seven weeks of the experiment but, after week 2, were lower than one mg/pot. Phosphorus levels ranged from 0.9 to 5.7 mg/pot in leachate with responses to irrigation treatment throughout the experiment.
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Nathiya, K. V., and V. Sanjivkumar. "Combined effect of different plant nutrients of organic and inorganic sources on nutrient uptake and yield of groundnut crop." Journal of Applied and Natural Science 6, no. 2 (December 1, 2014): 463–66. http://dx.doi.org/10.31018/jans.v6i2.483.
Full textAbstract:
A pot culture experiment was conducted to study the effect of combined use of organic manures with inorganic fertilizers on uptake of available nutrients and yield of groundnut crop at Tamil Nadu Agricultural College and Research Institute, Madurai during kharif season of 2008-2009. The experiment was laid out in completely randomized design (factorial) with two replications. Main pot treatments comprised of three types of manures viz, control ( M0 ), pressmud @ 5 t ha-1 ( M1 ), vermicompost @ 2 t ha-1 ( M2 ), farmyard manure @12.5 t ha-1 ( M3 ) and sub pot treatment comprised of 4 levels of K viz, 0 (K0), 100 ( K1 ) , 75 ( K2 ) and 50 kg of K20 ha-1 ( K3 ) with a recommended dose of fertilizer (RDF) respectively. The results revealed that highest nitrogen, phosphorus and potassium uptake of 1.01, 0.96 and 0.80 g/pot was recorded in the treatment that received 75 kg K2O ha-1 and Pressmud @ 5 t ha-1 (K1M1) and in the pots which treatment received K1M1 showed the highest Haulm and pod yield of (28.25 and 24.5 g/pot) of groundnut crop respectively.