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Journal articles on the topic 'Phosphatic fertilizers Testing'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Fauzan, M., Sofyan Husein Siregar, and Syafruddin Nasution. "EFFECT OF DIFFERENT TYPES OF FERTILIZER ON THE GROWTH OF MARINE PHYTOPLANKTON POPULATION Chlorella vulgaris." Asian Journal of Aquatic Sciences 4, no. 1 (April 7, 2021): 65–72. http://dx.doi.org/10.31258/ajoas.4.1.65-72.

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This research was conducted on October 13-26, 2019 in the Regional Technical Implementation Unit of the Seawater and Brackish Aquaculture Fisheries Office (UPTD BPBALP Teluk Buo), West Sumatra. This study aims to determine the effect of applying different types of fertilizers to the growth of Chlorella vulgaris microalgae populations on laboratory scale culture. The method used in this study was an experimental method in the laboratory using a completely randomized design (CRD) one factor, namely the difference in fertilizer types with 3 (three) replications. Fertilizers used are Walne fertili

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2

Boyhan, George E., Reid L. Torrance, Ronald H. Blackley, M. Jefferson Cook, and C. Randell Hill. "EVALUATION OF FERTILITY PRACTICES FOR VIDALIA ONIONS." HortScience 40, no. 3 (June 2005): 885e—886. http://dx.doi.org/10.21273/hortsci.40.3.885e.

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Fertilizer rates of N, P, K were evaluated over 4 years (2000–03) as were different sources of experimental and commercial fertilizers. The highest total yields and yields of jumbos (≥7.6 cm) occurred with nitrogen rates of 140–168 kg·ha–1. Neither phosphorus nor potassium rates had an affect on total yield. Phosphorus rates of 0-147 kg·ha–1 and potassium rates of 0–177 kg·ha–1 were evaluated. Increasing nitrogen fertilizer resulted in increasing leaf tissue nitrogen, but did not affect P, K, Ca, or S. Increasing phosphorus fertilizer increased leaf tissue phosphorus only slightly (p = 0.060)

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3

Bryla, David R., and Bernadine C. Strik. "Nutrient Requirements, Leaf Tissue Standards, and New Options for Fertigation of Northern Highbush Blueberry." HortTechnology 25, no. 4 (August 2015): 464–70. http://dx.doi.org/10.21273/horttech.25.4.464.

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Northern highbush blueberry (Vaccinium corymbosum) is well adapted to acidic soils with low nutrient availability, but often requires regular applications of nitrogen (N) and other nutrients for profitable production. Typically, nutrients accumulate in the plant tissues following the same pattern as dry matter and are lost or removed by leaf senescence, pruning, fruit harvest, and root turnover. Leaf tissue testing is a useful tool for monitoring nutrient requirements in northern highbush blueberry, and standards for analysis have been updated for Oregon. Until recently, most commercial planti

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4

Pauly, D. G., S. S. Malhi, and M. Nyborg. "Controlled-release P fertilizer concept evaluation using growth and P uptake of barley from three soils in greenhouse." Canadian Journal of Soil Science 82, no. 2 (May 1, 2002): 201–10. http://dx.doi.org/10.4141/s01-021.

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Use of controlled-release P fertilizers to match the fertilizer P availability to crop requirement has potential for improvement of P uptake and crop production. Greenhouse experiments were conducted to evaluate the concept of controlled-release P fertilizer by using different coatings to regulate the release of P and to compare the growth and P uptake of barley (Hordeum vulgare L.) in three Alberta soils. Testing of different coatings in one experiment was followed by further evaluation of the promising treatments in two experiments. Commercial monoammonium phosphate (MAP) and diammonium phos

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5

Rodrigues, Laís Maia, Ricardo Francisco Pires, and Davi Leonardo de Souza. "Study of Granulated Gypsum Hardness Coming from the Granulation Process in Rotating Disk." Materials Science Forum 899 (July 2017): 160–66. http://dx.doi.org/10.4028/www.scientific.net/msf.899.160.

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The granulation process is a unit operation with broad application in the fertilizer industry. The granular fertilizer has a better physical appearance, facility of agricultural application and elimination of fugitive dust in the production and bagging units. Phosphogypsum is a residue from the production of phosphate fertilizers. It known that for every 1 t of phosphate fertilizer produced, about 4 t of phosphogypsum are obtained, causing problems in storage and risks to the environment. Such problems may be minimized by granulating the waste phosphogypsum and using it in agriculture. This wo

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6

Mikkelsen, Robert L., and Thomas W. Bruulsema. "Fertilizer Use for Horticultural Crops in the U.S. during the 20th Century." HortTechnology 15, no. 1 (January 2005): 24–30. http://dx.doi.org/10.21273/horttech.15.1.0024.

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Tremendous changes have occurred during the past century in the sources and methods for supplying nutrients for horticultural crops. Reliance on animal manure, cover crops, and animal tankage was insufficient to meet the crop nutrient demand for a rapidly expanding population. The Haber-Bosch process for ammonia synthesis (1910s) revolutionized the availability and affordability of nitrogen (N) fertilizer. Discovery of large-scale deposits of rock phosphate in South Carolina (1860s) and Florida (1880s) alleviated widespread nutrient deficiencies. Acidification of rock phosphate and bone materi

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7

McKenzie, R. H., E. Bremer, L. Kryzanowski, A. B. Middleton, E. D. Solberg, D. Heaney, G. Coy, and J. Harapiak. "Yield benefit of phosphorus fertilizer for wheat, barley and canola in Alberta." Canadian Journal of Soil Science 83, no. 4 (August 1, 2003): 431–41. http://dx.doi.org/10.4141/s02-078.

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Crop responsiveness to P fertilizers on the Canadian Prairies has likely declined during the past three to four decades due to regular application of P fertilizer and reduced tillage. Its relationship to extractable soil P as determined by various soil tests may also have changed. The objective of this study was to evaluate five soil test P methods for three major crops across a wide range of soil types and environmental conditions. Small-plot P fertilizer trials were conducted at 154 locations across Alberta from 1991 through 1993. At each location, fertilizer responses were determined for on

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8

Pathak, Enish, Arjun Sanjyal, Chhatra Raj Regmi, Saroj Paudel, and Anima Shrestha. "Screening of Potential Plant Growth Promoting Properties of Bacillus Species Isolated from Different Regions of Nepal." Nepal Journal of Biotechnology 9, no. 1 (July 31, 2021): 79–84. http://dx.doi.org/10.3126/njb.v9i1.38672.

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The deleterious effects of intensive use of chemical fertilizers and pesticides in agriculture has led to the substantial research efforts on finding the alternatives to these agrochemicals. This study was aimed to isolate Bacillus species from soil of different regions of Nepal and screen for their ability to promote plant growth directly or indirectly by testing their ability to produce plant growth hormone indole acetic acid, hydrogen cyanide, ammonia and protease as well as phosphate solubilization. Thirty nine Bacillus strains were isolated from 25 soil samples of different regions of Kat

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9

Johnston, Adrian M., and F. Craig Stevenson. "Field pea response to seeding depth and P fertilization." Canadian Journal of Plant Science 81, no. 3 (July 1, 2001): 573–75. http://dx.doi.org/10.4141/p00-166.

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A study was conducted at Melfort, SK, in 1998 and 1999 to determine whether seeding depth and P fertilization affect field pea (Pisum sativum L.) seedling emergence and grain yield. Treatments included a factorial combination of three seeding depths (38 mm, 76 mm, and 114 mm) with and without 25 kg P2O5 ha–1 as monoammonium phosphate. While seedling density was not affected by seeding depth at 3 wk after planting, the deepest seeding depth produced significantly fewer seedlings than the two shallower depths at 5 wk post-seeding. A year-by-seeding-depth interaction was recorded for grain yield,

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10

Smagula, John M., and Scott Dunham. "Pruning Method Affects Lowbush Blueberry Yields." HortScience 30, no. 4 (July 1995): 784C—784. http://dx.doi.org/10.21273/hortsci.30.4.784c.

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Flail mowing was compared to traditional pruning by oil fire over a 12-year period in two fertility experiments testing interactions with pruning method. In study one (1983–1986), urea at 0, 22.4, 44.8, 67.2, or 89.6 kg·ha–1 was applied preemergent in a split-block design with fertility as the main effect, and pruning method split within six blocks. Study two (1987–1994) continued the pruning and application of fertilizer on the treatment plots with similar rates, but diammonium phosphate (DAP) replaced urea as the fertilizer. Leaf tissue N concentrations were above the 1.6% standard and urea

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11

Stamford, Newton Pereira, Patrícia Ribeiro dos Santos, Adriana Muniz Mendes Freire de Moura, Carolina Etiene de Rosália e. Silva Santos, and Ana Dolores Santiago de Freitas. "Biofertilzers with natural phosphate, sulphur and Acidithiobacillus in a siol with low available-P." Scientia Agricola 60, no. 4 (December 2003): 767–73. http://dx.doi.org/10.1590/s0103-90162003000400024.

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The production of mineral fertilizers is a expensive process, since it requires high energy consumption, and cannot be produced by small farmers. Laboratory assays were conducted to produce P-biofertilizers from natural phosphate (B5, B10, B15, B20), applying sulphur at different rates (5; 10; 15 and 20%) inoculated with Acidithiobacillus (S*) and testing increasing periods of incubation. A greenhouse experiment was carried out to evaluate the effect of the biofertilizers in a soil with low available P (Typic Fragiudult) from the "Zona da Mata" of Pernambuco State, grown with yam bean (Pachyrh

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12

Zlata, Holečková, Kulhánek Martin, Hakl Josef, and Balík Jiří. "Use of active microorganisms of the Pseudomonas genus during cultivation of maize in field conditions." Plant, Soil and Environment 64, No. 1 (January 16, 2018): 26–31. http://dx.doi.org/10.17221/725/2017-pse.

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The aim of this research is to estimate the influence of a bioeffector (BE) application on dry matter yield and nutrient content (P, K, Ca, Mg, S) in maize (Zea mays L.). Between 2014 and 2016, a field experiment with silage maize as a testing plant was realized on sandy loam Cambisol. The application of Pseudomonas sp. in combination with phosphorus (rock phosphate (RP) or triple superphosphate (TSP)) and nitrogen fertilizers (ammonium nitrate with urea, ammonium nitrate with limestone, calcium nitrate or ammonium sulfate with a nitrification inhibitor) and with different application strategi

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13

Fu, Ruimin, Fang Lin, Hong Zhang, Wenhui Xing, Huiping Chang, and Wuling Chen. "Optimization for Fermentation of Cattle Manure to Produce Bio-Fertilizer by Inoculating Complex Microbial Agents." Open Biotechnology Journal 9, no. 1 (November 2, 2015): 225–29. http://dx.doi.org/10.2174/1874070701509010225.

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In this study, in order to determine the optimization technology of bio-fertilizer, the aerobic fermentation test was conducted by using fresh manure and rice husk powder as materials. The inoculation, moisture content, C/N ratio and turning frequency analysed by single-factor test. Following this, the optimal conditions in the first fermentation were obtained through orthogonal experiments. After the first fermentation, the second fermentation was carried out by adding complex microbes with the ability to release potassium, dissolve phosphate and fix nitrogen. The termination time of second f

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14

Diagne, Mababa. "Use of alumina phosphate waste to produce building materials." Bulletin de la Société Géologique de France 184, no. 3 (March 1, 2013): 267–72. http://dx.doi.org/10.2113/gssgfbull.184.3.267.

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Abstract The generation of a fine fraction of sedimentary alumina phosphate before the manufacturing process of phosphoric acid –used as fertilizer– poses a crucial environmental issue related to the large quantities of fines stored for a long time in the wildlife without treatment or recycling in the region of Thiès in Sénégal by the Industries Chimiques du Sénégal (ICS) and the Société Sénégalaise des Phosphates de Thiès (SSPT). This work deals with the use of the fines particles of phosphate generated by the physical processing (crushing, transport and screening) of the raw material by the

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15

SOON, Y. K. "COMPARISON OF PARAMETERS OF SOIL PHOSPHATE AVAILABILITY FOR THE NORTHWESTERN CANADIAN PRAIRIE." Canadian Journal of Soil Science 70, no. 2 (May 1, 1990): 227–37. http://dx.doi.org/10.4141/cjss90-024.

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A greenhouse experiment was conducted to evaluate several P availability parameters using 17 soils from the Peace River region of northwestern Canada. Only one soil was calcareous; the rest were acidic. The extractants tested included alkaline bicarbonate, acidic fluoride and 0.01 M CaCl2 solutions, and an anion exchange resin. Other availability indices evaluated were phosphoric acid potentials, phosphate buffer capacity and single point P sorption indices. The phosphoric acid potentials gave the highest correlation with percent relative yield of barley dry matter obtained after about 7 wk of

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16

Jeksen, Julianus. "Uji Efektifvitas Cendawan Mikoriza Lokal Gerogak Lahan Kering dan Komersial Pada Tanaman Jagung (Zea mays L.)." AGRICA 5, no. 2 (July 22, 2020): 77–85. http://dx.doi.org/10.37478/agr.v5i2.448.

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Dryland in Indonesia has been dominated by acid soils, so that availability of phosphate (P) becomes the main obstacle in improving outcomes and only 10-30% of fertilizer P can be utilized by plants. One of the solution to meet the needs of phosphate is by utilization of mycorrhizal biofertilizer. These experiments were divided into several phases: 1) Looking for phases of mycorrhizal, 2) the laboratory analysis, 3) Testing phase on plants that were carried out by using polybags with sterile soil. The experiment was designed with a complete randomized block design (RAKL) by using a factor that

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17

Bennett, James P., Kyei Sing Kwong, Hugh Thomas, and Rick Krabbe. "A New Generation of Refractories to Enable Gasifier Fuel Flexibility." Advances in Science and Technology 70 (October 2010): 179–92. http://dx.doi.org/10.4028/www.scientific.net/ast.70.179.

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Gasification is used by industry to convert low cost carbon into materials for producing electricity and chemical products such as fertilizer, plastics, and Fischer-Tropsch liquids. It is considered a critical technology in the success of the DOE’s Near Zero Emissions Advanced Fossil Fuel Power Plants, could play a key role in defining long-term energy security in both power and liquid fuels, and is considered a leading candidate for H2 production in a hydrogen based economy. Molten slag originating from mineral impurities in the carbon feedstock is of concern to slagging gasifier operation, w

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18

Björkman, Thomas, and Stephen Reiners. "Meeting Initial Snap Bean Seedling Requirements with Starter Phosphorus or Bicarbonate to Solubilize Soil Phosphorus in High-phosphorus Soils." HortScience 50, no. 4 (April 2015): 590–96. http://dx.doi.org/10.21273/hortsci.50.4.590.

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Starter phosphorus (P) is often recommended for warm-season vegetables sown in cool soil, even if soil P index levels are already high. The cost and environmental risk associated with excessive P fertilization justify re-examination of the practice. The objective of the study was to confirm that performance of early plantings of snap bean (Phaseolus vulgaris L.) is improved by starter P application and to test whether solubilizing soil P with potassium bicarbonate (KHCO3) can serve as an alternative in western New York soils. Addition of starter fertilizer at either recommended (15 kg·ha−1) or

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19

Demydenko, O., V. Prybluda, Yu Zapasna, and V. Velychko. "Agrogenesis of regraded chernozem and the performance of grain crops under organic system of fertilization." Agricultural Science and Practice 4, no. 3 (December 15, 2017): 50–61. http://dx.doi.org/10.15407/agrisp4.03.050.

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Aim. To conduct complex agrophysical, physical-chemical substantiation of the effi ciency of the organic fer- tilization system in terms of nitrogen balance and organic carbon in the agroecosystem of a fi ve-fi eld grain- growing and weeding crop rotation fi lled with cereals and legumes up to 40 % and the use of by-products for fertility restoration and improvement of the agrogenesis of regraded chernozem in the central part of the Forest-Steppe of Ukraine. Methods. Laboratory-analytical, experimental fi eld, computational, statistical. Results. The systematic application of the organic syste

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20

Eltarabily, Mohamed Galal, John M. Burke, and Khaled M. Bali. "Effect of Deficit Irrigation on Nitrogen Uptake of Sunflower in the Low Desert Region of California." Water 11, no. 11 (November 8, 2019): 2340. http://dx.doi.org/10.3390/w11112340.

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Nitrogen (N) accounts for more than 80% of the total mineral nutrients absorbed by plants and it is the most widely limiting element for crop production, particularly under water deficit conditions. For a comprehensive understanding of sunflower Helianthus annuus N uptake under deficit irrigation conditions, experimental and numerical simulation studies were conducted for full (100% ETC) and deficit (65% ETC) irrigation practices under the semi-arid conditions of the Imperial Valley, California, USA. Plants were established with overhead sprinkler irrigation before transitioning to subsurface

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21

Li, Hongjun, Yuming Zhang, Yuping Lei, Vita Antoniuk, and Chunsheng Hu. "Evaluating Different Non-Destructive Estimation Methods for Winter Wheat (Triticum aestivum L.) Nitrogen Status Based on Canopy Spectrum." Remote Sensing 12, no. 1 (December 26, 2019): 95. http://dx.doi.org/10.3390/rs12010095.

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Compared to conventional laboratory testing methods, crop nitrogen estimation methods based on canopy spectral characteristics have advantages in terms of timeliness, cost, and practicality. A variety of rapid and non-destructive estimation methods based on the canopy spectrum have been developed on the scale of space, sky, and ground. In order to understand the differences in estimation accuracy and applicability of these methods, as well as for the convenience of users to select the suitable technology, models for estimation of nitrogen status of winter wheat were developed and compared for

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22

Shahzoda, Turdialieva, Alimov Umarbek Kadyrbergenovich, Namazov Shafoat Sattarovich, Seytnazarov Atanazar Reypnazarovich, and Beglov Boris Mikhaylovich. "Concentrated Np- and Npk-Fertilizers Based on Kyzylkum Evaporated Phosphoric Acid, Carbamide and Potassium Chloride." Chemical Science International Journal, March 25, 2019, 1–8. http://dx.doi.org/10.9734/csji/2019/v26i230089.

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In the paper the processes of carboammophos and carboammophos potassium preparation based on the ammonization of the samples by evaporated wet phosphoric acid (WPA) (35.92; 40.85; 46.41; 51.07% P2O5) to pH = 5.3 (to obtain ammophos pulp) and pH = 7.0 (to obtain diammophos pulp) with subsequent addition of 70% solution of urea and crystalline potassium chloride (60% K2O) were studied. Moreover, for urea-phosphate, weight ratio of the N: P2O5: K2O ranged from 1: 0.5 to 1: 1: 1 for the N: P2O5: K2O urea-phosphate-potassium from 1: 0.7: 0.3 to 1: 1: 1. To avoid loss of ammonia, the drying of NP- a

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23

"The interactions between the supplies of water and of nutrients available to crops: implications for practical progress and for scientific work." Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences 316, no. 1537 (February 13, 1986): 331–46. http://dx.doi.org/10.1098/rsta.1986.0012.

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Many experiments have shown that the interactions between the supplies of water and of plant nutrients have large effects on crop production and on the efficiencies of both irrigation and fertilizers. Biological constraints, such as pests and diseases, also affect the returns from these inputs. High efficiency in the use of water is only achieved when crops have access to adequate supplies of nutrients. Similarly, full returns from fertilizers are obtained only when water supplies are sufficient for the needs of the crop; but water applied in excess or at inappropriate times may cause large lo

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24

Gebremichael, Yohannes, and Gebremedhen Gebretsadikan. "Effect of Mineral Nitrogen and Phosphorus Fertilizer Rates on Marketable Yield and Economic Return of Tomato (Lycopersicon esculentum Mil) at Northwestern Zone of Tigray." Asian Research Journal of Agriculture, December 6, 2019, 1–7. http://dx.doi.org/10.9734/arja/2019/v11i430070.

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A field experiment was conducted to study the effect of different nitrogen and phosphorus fertilizer rates on the growth and yield tomato at Northwestern Zone of Tigray during 2016-2017 cropping season under irrigation condition. It is the most cultivated and high market value of vegetable crops in Tigray Northern Ethiopia. However, tomato production is limited due to low fertility of soil and inappropriate fertilizer rate. Six different levels of nitrogen (0, 23, 46, 69, 92 and 115 kg N /ha) and six different levels of phosphorus (0, 46, 69, 92,115 and 138 kg P2O5/ ha) were used and laid out

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25

"Selection of Best Frequency Range for Soil Urea Prediction." International Journal of Innovative Technology and Exploring Engineering 9, no. 3 (January 10, 2020): 1934–36. http://dx.doi.org/10.35940/ijitee.c8904.019320.

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Soil is a complex system and its nature determines the types of crops that can be cultivated. Soil testing plays an important role in determining its ability to grow crops. Conventional soil testing methods are found to be cumbersome and expensive and also time consuming. Hence there is a need for methods which can give fast results and help in effective crop cultivation. Soil exhibits both spatial and temporal variability. The traditional methods of soil testing do not take into account the variability of the soil and uniform application of external inputs is done. This leads to over or under

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