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Journal articles on the topic 'Superphosphate'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Bolland, M. D. A., J. S. Yeates, and M. F. Clarke. "Single and coastal superphosphates are equally effective as sulfur fertilisers for subterranean clover on very sandy soils in high rainfall areas of south-western Australia." Australian Journal of Experimental Agriculture 43, no. 9 (2003): 1117. http://dx.doi.org/10.1071/ea02168.

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To reduce leaching of phosphorus (P) from fertilised pastures to shallow estuaries in the high rainfall (>800 mm annual average) areas of south-western Australia, and to supply extra sulfur (S) for subterranean clover (Trifolium subterraneum L.) in pasture, 'coastal superphosphate' was developed as a possible alternative P and S fertiliser to single superphosphate. Coastal superphosphate is made by adding phosphate rock and elemental S to single superphosphate as it comes out of the den before granulation. It has about 3 times more sulfur (S) and one-third the water-soluble P content than s

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2

Khin, Sandar Tun, Lwin Thazin, and Mar Tun Khin. "Application and Modification of Phosphate-Bearing Rock in Myanmar as a Potential Mineral Fertilizer." Dagon University Research Journal Vol.5, no. 2013 (2019): Pg.87–99. https://doi.org/10.5281/zenodo.3545489.

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Phosphate rock is the basic material used in all phosphorus fertilizer production. In Myanmar, phosphate rocks are found in Shan State, Mon State, Kayah State and Mandalay Division. In this work, phosphate minerals as phosphorite samples were collected from Thabeikyin area in Mandalay Division. The phosphorite mineral consists of 8.59 % of P2O5 which is modified by wet screening and hydroseparation method to upgrade the phosphate content. Phosphate fertilizers; phosphoric acid, normal and triple superphosphate were prepared from upgraded phosphate powder (14.56 % P2O5) by using concentrated su

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3

Prochnow, Luís Ignácio, José Francisco da Cunha, and Ariel Francisco Candiotti Ventimiglia. "Field evaluation of water or citrate soluble phosphorus in modified phosphate rocks for soybean." Scientia Agricola 58, no. 1 (2001): 165–70. http://dx.doi.org/10.1590/s0103-90162001000100025.

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Ten P fertilizers were collected (commercial fertilizers) or synthesized (experimental sources) in order to obtain single superphosphates varying in water and citrate solubility. A standard source of P was also produced by crystallization of the water-soluble fraction of a triple superphosphate. Eleven P sources were band applied to a medium textured Xanthic Hapludox, in Bahia, Brazil (low content of resin-extractable P) at a rate of 80 kg ha-1 of NAC + H2O (neutral ammonium citrate plus water) soluble P2O5, with soybean as the crop which was grown to maturity. A check plot (control) was inclu

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4

Brennan, RF, and M. Grimm. "Effect of aphids and mites on herbage and seed production of subterranean clover (cv. Daliak) in response to superphosphate and potash." Australian Journal of Experimental Agriculture 32, no. 1 (1992): 39. http://dx.doi.org/10.1071/ea9920039.

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The dry matter production (DM) and seed yield of subterranean clover (Trifolium subterraneum L. cv. Daliak) were reduced by infestations of redlegged earth mite (Halotydeus destructor Tucker) and blue-green aphid (Acyrthosiphon kondoi Shinji) during spring growth, flowering and burr burial. The dominance of these pests varied with season. The effects of spraying with insecticides on the DM and seed yield responses to superphosphate and potassium chloride fertilisers were measured. Responses to superphosphate were described by Mitscherlich functions for each of 3 levels of potassium chloride, e

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5

Fraser, T. J., S. Dennis, R. A. Moss, et al. "Long term effect of superphosphate fertilisers on pasture persistence." NZGA: Research and Practice Series 15 (January 1, 2011): 93–97. http://dx.doi.org/10.33584/rps.15.2011.3210.

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Core samples were taken from 60-year-old pastures on a long-term fertiliser trial at the Winchmore research station, in Canterbury, New Zealand. Plots had been treated with 0, 188 or 376 kg/ha of superphosphate annually, grazed by sheep, and pasture yields were recorded. Ryegrass persisted in all treatments, but was only dominant in the superphosphate treatments, unsown grasses dominated in the no superphosphate treatments. White clover was more common with superphosphate, and both cocksfoot and timothy required adequate superphosphate in order to persist. Over 60 years of measurements, yields

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6

Horsnell, LJ. "The growth of improved pastures on acid soils. 2. The effect of soil incorporation of lime and phosphorus on the growth of subterranean clover and lucerne pastures and on their response to topdressing." Australian Journal of Experimental Agriculture 25, no. 1 (1985): 157. http://dx.doi.org/10.1071/ea9850157.

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Subterranean clover responds poorly to superphosphate application on some acid soils of the Southern Tablelands of New South Wales. A field experiment was undertaken, for two years, to examine the effects of incorporating large additional amounts of superphosphate or rock phosphate in the soil, with and without lime, on the growth of subterranean clover, lucerne and phalaris sown with recommended rates of lime superphosphate. Dry matter responses of subterranean clover and lucerne to superphosphate topdressing in the second year were also recorded. In the first year, subterranean clover growth

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7

Mthimunye, Latoya Miranda, Gudani Millicent Managa, and Lufuno Ethel Nemadodzi. "The Effects of Bradyrhizobium japonicum Inoculation and Superphosphate Fertilizer on the Growth and Development of Lablab (Lablab purpureus L.)." International Journal of Plant Biology 16, no. 1 (2025): 3. https://doi.org/10.3390/ijpb16010003.

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Nutrient-poor savanna soils severely limit agricultural productivity in Africa, hindering crops and livestock intensification and threatening food security. Addressing these deficiencies is crucial to meeting the world’s growing food demands and ensuring sustainable agricultural development. The experiment was conducted in a greenhouse laid in a randomized complete block design with eight treatments, namely: (T1) control, (T2) 45 kg/ha superphosphate, (T3) 60 kg/ha superphosphate, (T4) 75 kg/ha superphosphate, (T5) Bradyrhizobium japonicum inoculant, (T6) Bradyrhizobium japonicum inoculant +45

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8

Chen, Haotian, Haoruo Li, Tianqing Sun, Xin Huang, Yuyi Li, and Baoli Zhang. "Effects of Superphosphate on Greenhouse Gas Emissions and Compost Quality During Industrial Scale In-Vessel Swine Manure Composting." Agriculture 15, no. 2 (2025): 148. https://doi.org/10.3390/agriculture15020148.

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Composting is an environmentally friendly method for transforming the nutrients present in livestock manure into organic fertilizer. In this study, the compost quality-enhancing and N2O and CH4 emissions-reducing effects of superphosphate were investigated during industrial-scale in-vessel composting of swine manure. Alongside a control group, three different doses of superphosphate were tested: 5% (SSP5), 10% (SSP10), and 15% (SSP15). The results revealed that the superphosphate reduced the N2O and CH4 emissions by 18.5–26.3% and 15.8–25.1%, respectively. In addition, the superphosphate enhan

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9

Soratto, Rogério Peres, Eduardo do Valle Lima, Munir Mauad, Roberto Lyra Villas Boas, and João Nakagawa. "Millet seeds mixed with phosphate fertilizers." Scientia Agricola 60, no. 3 (2003): 573–79. http://dx.doi.org/10.1590/s0103-90162003000300024.

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The small size of millet seeds is the main cause for lack of uniformity at sowing, especially because most farmers do not have appropriate seeders. Mixing seeds and phosphate fertilizers would improve seeding, resulting in a better crop stand. To study the effects of such mixture on the physiological quality of seeds, millet seeds were mixed with single superphosphate or triple superphosphate (1 kg of seeds: 2.5 kg of fertilizer), and stored in plastic bags for 0, 6, 12, 24, 48, 72, 96 and 120 hours before sowing, under laboratory conditions. After storage, seeds were separated and their moist

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10

Cole, Janet C., and John M. Dole. "Leaching Characteristics of P From Four Fertilizer Sources in a Container Nursery Growing Medium." HortScience 30, no. 4 (1995): 794D—794. http://dx.doi.org/10.21273/hortsci.30.4.794d.

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A 3 pine bark: 1 peatmoss: 1 sand (by volume) medium was amended with 7.7 g P as superphosphate, triple superphosphate, ammonium phosphate, or controlled-release ammonium phosphate per 1000 g medium (3.8 liters). The medium was then leached with 250, 350, or 450 ml distilled, deionized water daily for 25 days. Phosphorus leaching curves were then generated for each fertilizer. A subsequent study determined the effect of these four P fertilizers on growth of marigold seedlings in the greenhouse. Superphosphate, triple superphosphate, and ammonium phosphate rapidly leached from the medium, while

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11

Adil, M. L., J. R. Patel, and S. C. Mukharjee. "Effect of Single Superphosphate and Granular Superphosphate Fertilizer on Rice Yield." International Rice Research Newsletter 14, no. 4 (1989): 33. https://doi.org/10.5281/zenodo.7146918.

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This article 'Effect of Single Superphosphate and Granular Superphosphate Fertilizer on Rice Yield' appeared in the International Rice Research Newsletter series, created by the International Rice Research Institute (IRRI). The primary objective of this publication was to expedite communication among scientists concerned with the development of improved technology for rice and for rice based cropping systems. This publication will report what scientists are doing to increase the production of rice in as much as this crop feeds the most densely populated and land scarce nations in the world.

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12

Vitti, D. M. S. S., A. L. Abdalla, H. O. S. Lopes, E. A. Pereira, and C. F. Meirelles. "Non-conventional P sources for zebu cows in Brazil." Scientia Agricola 52, no. 1 (1995): 78–81. http://dx.doi.org/10.1590/s0103-90161995000100014.

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To evaluate non-conventional phosphorus sources, a group of 400 Nellore cows mantained under pasture received a mineral mixture with different P sources (group I: superphosphate - 500 ppm P; group II: superphosphate - 340 ppm P plus rock phosphate Patos 160 ppm P; group III: superphosphate 340 ppm P plus dicalcium phosphate 160 ppm P; group IV - dicalcium phosphate 500 ppm P). There were no differences in pregnancy rate, calving rate and calving interval. A fluorine deposition in bone was observed for the treatments with superphosphate and rock phosphate (66.92 ± 15.53; 69.97 ± 6.5 and 64.05 ±

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13

Ayeyemi, Tolulope, Ramiro Recena, Ana María García-López, José Manuel Quintero, María Carmen del Campillo, and Antonio Delgado. "Efficiency of Vivianite from Water Purification Depending on Its Mixing with Superphosphate and Application Method." Agronomy 14, no. 11 (2024): 2639. http://dx.doi.org/10.3390/agronomy14112639.

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Vivianite precipitation is gaining attention in phosphorus (P) removal from water purification. It is an iron (Fe)- and P-rich compound that can be used as a slow-release P fertilizer. However, this slow release can constrain P supply to crops in the initial growing stages. This limitation can be overcome by mixing with soluble P fertilizers and with banding application. Thus, the objective of this study was to assess the fertilizer effect of vivianite and superphosphate mixtures and determine the most effective application method for vivianite and its mixture with superphosphate as a soluble

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14

Jarvis, RJ, and MDA Bolland. "Lupin grain yields and fertiliser effectiveness are increased by banding superphosphate below the seed." Australian Journal of Experimental Agriculture 31, no. 3 (1991): 357. http://dx.doi.org/10.1071/ea9910357.

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Five field experiments with lupins (Lupinus angustifolius) measured the effectiveness, for production, of 4 superphosphate placements either: (i) drilled with the seed to a depth of 4 or 5 cm; (ii) applied to the soil surface (topdressed) before sowing; or (iii) banded 2.5-5 cm and 7.5-8 cm below the seed while sowing. Levels of applied phosphate (P) from 0 to 36 kg P/ha were tested. In all experiments lupin grain yield responded to the highest level of superphosphate applied. At this P level, the average grain yield from all trials was 1.16 t/ha for the deepest banded treatment. This was 0.38

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15

Luo, Yi Ming, De Gang Xu, and Guo Xue Li. "Effect of Superphosphate as Additive on Nitrogen and Carbon Losses during Pig Manure Composting." Applied Mechanics and Materials 295-298 (February 2013): 1675–79. http://dx.doi.org/10.4028/www.scientific.net/amm.295-298.1675.

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A pilot scale experiment of composting in rotting boxes used pig manure with cornstalks was carried out to study the effects of superphosphate on nitrogen and carbon losses including gas emissions. Besides control, there were five amended treatments with superphosphate addition (counted by P content) at 0.05, 0.10, 0.15, 0.20 and 0.25 molar ratio of initial nitrogen. The results indicated that superphosphate addition decreased ammonia volatilization, total nitrogen and carbon losses in composting. Total nitrogen losses of superphosphate-amended treatments were reduced by 9.3%, 14.6%, 30.1%, 45

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16

Bolland, MDA, AJ Weatherley, RJ Gilkes, and JW Bowden. "Granular reactive apatite rock phosphate is not an effective phosphorus fertilizer in the short term on lateritic soils in south-western Australia." Australian Journal of Experimental Agriculture 26, no. 2 (1986): 217. http://dx.doi.org/10.1071/ea9860217.

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The effectiveness, as a phosphate fertilizer, of granular reactive rock phosphate (carbonate substituted apatite from North Carolina, U.S.A.), granular triple superphosphate and partly powdered Duchess non-reactive rock phosphate (low carbonate apatite from north-eastern Australia) was compared in three field experiments on different soil types in different climatic regions of south-western Australia. Calciphos (finely ground calcined crandallite rock phosphate from Christmas Island) was included in one experiment. The rock phosphates were incorporated into the soil and their effectiveness was

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17

Silva, Cicero José da, Luiz Felipe Mariano da Silva, Jeferson dos Santos Neres, et al. "Phosphate fertilization in processing tomato irrigated by localized irrigation systems." Comunicata Scientiae 15 (July 30, 2024): e4174. http://dx.doi.org/10.14295/cs.v15.4174.

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The aim of this work was to evaluate different combinations of phosphate fertilizer sources on processing tomato (cv. BRS Sena) development and yield, irrigated by localized irrigation systems. The experimental design was in randomized blocks, in split plots, in a factorial scheme (3x5), with four replications. In the plots were used three irrigation systems: drip; subsurface drip and microsprinkler. In the subplots, five combinations of phosphate fertilizer: 100% of Thermophosphate; 100% Triple Superphosphate; 75% Thermophosphate + 25% Triple Superphosphate; 50% Thermophosphate + 50% Triple S

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18

Bolland, MDA, MJ Baker, and RJ Lunt. "Effectiveness of superphosphate and crandallite-millisite rock phosphates on a deep, very sandy soil as assessed by plant growth and soil extractable phosphate." Australian Journal of Experimental Agriculture 27, no. 5 (1987): 647. http://dx.doi.org/10.1071/ea9870647.

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The initial and residual effectiveness of superphosphate, Christmas Island C-grade ore (C-ore) and 500�C heated (calcined) C-ore (Calciphos) was measured on a deep, very sandy soil near Badgingarra, W.A. Different levels of each fertiliser were applied once only in May 1980. Yields of lupins (1980 and 1983) and subterranean clover (1981) were used to determine the effectiveness of the fertilisers, and in 1986 the residual value of the fertilisers was measured for wheat, oats, and barley, relative to freshly applied superphosphate. Samples of the top 10 cm of soil were collected each January-Fe

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19

Bolland, MDA. "Effectiveness of topdressed and incorporated superphosphate and Duchess rock phosphate for subterranean clover on sandy soils near Esperance Western Australia." Australian Journal of Experimental Agriculture 27, no. 1 (1987): 87. http://dx.doi.org/10.1071/ea9870087.

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In 2 experiments on sandy soil near Esperance, W. A., superphosphate and Duchess (Queensland) apatite rock phosphate were either left on the soil surface after application (topdressed) or incorporated into the top 10 cm of the soil with a rotary hoe (incorporated). One experiment was on Fleming gravelly sand which had a greater capacity to adsorb phosphorus than did the deep yellow sand (Gibson sand) used in the other experiment. Dry matter or seed yield of subterranean clover and phosphorus content of dry herbage or seed were used as indicators of the effectiveness of the phosphorus treatment

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20

Ganiev, Pirnazar, Shafoat Namazov, Najimuddin Usanbaev, Uktam Temirov, and Bakhtiyor Numonov. "Studies of the physico-chemical properties of humic simple superphosphate obtained on the basis of Central Kyzylkum phosphorites and oxidized coal." E3S Web of Conferences 377 (2023): 03013. http://dx.doi.org/10.1051/e3sconf/202337703013.

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This article presents the results of the physical and chemical properties of humic simple superphosphate obtained by decomposition of the ordinary phosphorous flour of the Central Kyzylkum with sulfuric acid and the addition of oxidized coal from the Angren deposit with hydrogen peroxide. The distinctive characteristics of humic simple superphosphate are shown in comparison with simple superphosphate obtained without the addition of oxidized coal.

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21

Mears, PT, and BR Cullis. "Superphosphate maintains soil fertility and beef production on grazed white clover pastures in the subtropics. 2. Liveweight responses of beef cattle." Australian Journal of Experimental Agriculture 33, no. 4 (1993): 435. http://dx.doi.org/10.1071/ea9930435.

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Growth of cattle was measured between 1974-75 and 1980-81 on a white clover (Trifolium repens) and carpet grass (Axonopus affinis) pasture receiving superphosphate applied at 0, 12, 24, and48 kg P/ha annually. Hereford weaner steers grazed the pastures at 1.67, 2.5, and 3.3 steers/ha. Linear responses to superphosphate and stocking rate were significant (P<0.001). The model estimating steer liveweight response to superphosphate comprised a long-term quadratic trend with seasonal variations. The liveweight response to superphosphate application was greatest in liveweight response to superpho

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22

Rossete, Alexssandra Luiza Rodrigues Molina, Josiane Meire Toloti Carneiro, José Albertino Bendassolli, Claudineia Raquel Oliveira Tavares, and Carlos Roberto Sant'Ana Filho. "Production of single superphosphate labeled with 34S." Scientia Agricola 65, no. 1 (2008): 91–94. http://dx.doi.org/10.1590/s0103-90162008000100013.

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Single superphosphate is currently one of the mostly used fertilizers as an alternative source for phosphorus and sulphur. Sulphur presents four stable isotopes (32S, 33S, 34S, and 36S) with natural abundances of 95.00; 0.76; 4.22; and 0.014% in atoms, respectively. Single superphosphate labeled with the 34S isotope was obtained from a chemical reaction in stoichiometric amounts between Ca(H2PO4)2 and Ca34SO4.2H2O. Calcium sulphate (Ca34SO4.2H2O) was enriched with 5.85 ± 0.01 atoms % of 34S. The Ca(H2PO4)2 reagent was obtained from a reaction between CaCl2.2H2O and H3PO4. The reaction between

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23

Brennan, RF. "Effect of superphosphate and superphosphate plus flutriafol on yield and take-all of wheat." Australian Journal of Experimental Agriculture 29, no. 2 (1989): 247. http://dx.doi.org/10.1071/ea9890247.

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Wheat was grown in soil amended with 5 levels of superphosphate with or without 4 levels of flutriafol at 3 sites naturally infested with Gaeumannomyces graminis var. tritici. The severity of take-all was related to the rates of superphosphate and flutriafol. At all sites, the disease incidence and severity were high, with values for the moderate plus severe category (i.e. >25% of the root system discoloured by the takeall fungus) exceeding 80% for untreated plots. As plants responded to increasing levels of superphosphate and flutriafol, the percentage of infected roots declined. There was

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24

Summers, Robert, Martin Clarke, Tim Pope, and Tim O'Dea. "Comparison of single superphosphate and superphosphate coated with bauxite residue for subterranean clover production on phosphorus-leaching soils." Soil Research 38, no. 3 (2000): 735. http://dx.doi.org/10.1071/sr99070.

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Bauxite residue from alumina refining was used to coat granules of single superphosphate to reduce the leaching of phosphorus in coarse, sandy soils for pastures in high rainfall areas of south-western Australia (>800 mm annual average). The impact of coating the superphosphate on the leaching of phosphorus was measured in a glasshouse experiment and the effectiveness of the fertiliser using dry herbage yield of subterranean clover (Trifolium subterraneum) was measured in a field experiment. The glasshouse experiment measured the effect of coating the superphosphate with bauxite residue at

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25

Bolland, MDA, RJ Gilkes, DG Allen, and MF D'Antuono. "Residual value of superphosphate and Queensland rock phosphate for serradella and clover on very sandy soils as assessed by plant growth and bicarbonate-soluble phosphorus." Australian Journal of Experimental Agriculture 27, no. 2 (1987): 275. http://dx.doi.org/10.1071/ea9870275.

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Superphosphate (0-0.4 t/ha P) and Queensland rock phosphate (0-20 t/ha P) were incorporated into the top 10 cm of very sandy soil near Esperance, W.A. The effectiveness of the fertilisers for pastures was calculated from dry herbage yields of yellow serradella, slender serradella and subterranean clover. Soil samples were collected just after fertiliser application and at intervals up to 2.5 years for measurement of bicarbonate-extractable phosphorus (soil test), which was related to plant yield. Results for all 3 species were very similar in response to superphosphate. The effectiveness of su

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26

Bolland, MDA, and MJ Baker. "Increases in soil water content decrease the residual value of superphosphate." Australian Journal of Experimental Agriculture 27, no. 4 (1987): 571. http://dx.doi.org/10.1071/ea9870571.

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In pot experiments, levels of superphosphate incorporated through the whole soil were incubated for 30 days in 2 lateritic soils from south-western Australia at 1 of the following 5 soil water contents: air-dry for 30 days, at field capacity for 10 or 30 days, and flooded for 10 or 30 days. The soils were then air-dried for 30 days and the residual value of the superphosphate relative to freshly applied superphosphate was measured using 30-day-old triticale (x Triticosecale cv. Tyalla) and wheat (Triticum aestivum cv. Gamenya) plants. Soil samples were collected just before sowing from each po

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27

Wang, Hui, Suyan Li, Xiangyang Sun, et al. "The Influence of Ceramsite and Superphosphate on Humification in the Composting Process of Garden Wastes." Sustainability 17, no. 2 (2025): 538. https://doi.org/10.3390/su17020538.

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This study used ceramsite and superphosphate as exogenous additives for composting garden wastes. It investigated the changes in temperature, pH, lignocellulose, enzyme activity, humic substrates, and humification parameters during the composting process. A total of four treatments—T0 (CK), T1 (ceramsite), T2 (superphosphate), and T3 (superphosphate + ceramsite)—were tested in a 50-day composting experiment. It was found that the formation of the compost humic substrate could be increased to 14.69% under the action of ceramsite. In addition, ceramsite promoted lignocellulose degradation, impro

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28

Deinert, Lea, and Achim Schmalenberger. "Reuse of Soils Fertilized with Ash as Recycling Derived Fertilizer Revealed Strong Stimulation of Microbial Communities Involved in P Mobilization in Lolium perenne Rhizospheres." Environments 11, no. 3 (2024): 49. http://dx.doi.org/10.3390/environments11030049.

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Circular economy recycling-derived fertilizers (RDF) have the potential to replace linear economy fertilizers such as unsustainable superphosphates. Here, effects of ash RDF treatments in Irish grassland cultivation were investigated in a simulated second growing season. Soil fertilized in a preceding pot trial with superphosphate (SP), poultry-litter ash (PLA) and sewage-sludge ash (SSA) at P concentration of 60 kg P ha−1 and a P-free control (SP0) was reused in a microcosm trial. Lolium perenne was cultivated for 54 days in six replicates with a full complement of micro- and macro-nutrients

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29

Weaver, DM, GSP Ritchie, and GC Anderson. "Phosphorus leaching in sandy soils .II. Laboratory studies of the long-term effects of the phosphorus source." Soil Research 26, no. 1 (1988): 191. http://dx.doi.org/10.1071/sr9880191.

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Long-term phosphorus (P) losses and gains in sandy soils continuously fertilized with either ordinary superphosphate or coastal superphosphate (a granulated mixture of superphosphate, rock phosphate and elemental sulfur) or previously fertilized with superphosphate were investigated under leaching conditions in columns in the laboratory. The soils were subjected to 10 consecutive cycles designed to simulate the mediterranean weather conditions in the Harvey region of the Coastal Plain of Western Australia. Each cycle consisted of a wet phase during which the equivalent of 850 mm of rainfall wa

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30

SREEKANTAN, LEKHA, and PALANIAPPAN P.S. "P MANAGEMENT IN RICE-RICE-GREENGRAM CROPPING SYSTEM." Madras Agricultural Journal 80, December (1993): 675–77. http://dx.doi.org/10.29321/maj.10.a01718.

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The productivity and economics of rice-rice-greengram cropping system under different P management practices were studied. The optimal P management schedules for the highest total productivity and profit were green manuring combined with superphosphate application in the first crop rice and long stubble (25 cm) incorporation with superphosphate application in the second crop of rice, short stubble (10 cm) incorporation with superphosphate application in the second crop or short stubble incorporation with rock-phosphate application in the second crop.

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Mears, PT, EJ Havilah, GH Price, RE Darnell, DJ McLennan, and C. Wilson. "Superphosphate maintains soil fertility and beef production on grazed white clover pastures in the subtropics. 1. Residual soil phosphorus, sulfur, and nitrogen, and pasture growth responses." Australian Journal of Experimental Agriculture 33, no. 4 (1993): 425. http://dx.doi.org/10.1071/ea9930425.

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Phosphorus (P) as superphosphate was applied at 0, 12, 24, and 48 kg P/ha each year from 1972 to 1980 to an established white clover (Trifolium repens) and carpet grass (Axonopus affinis) pasture, to measure long-term changes in soil fertility and pasture production under grazing on a duplex soil in a coastal, subtropical environment. Hereford weaner steers grazed the pasture at 2 stocking rates (1.67 and 2.5 steers/ha) from 1972 to 1974, and at 3 stocking rates (1.67, 2.50, and 3.3 steers/ha) for 7 years to 1981. The effects of P and stocking rate during 1972-76 on pasture and animal producti

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32

Eddy, Robert, Brian Whipker, and P. Allen Hammer. "DETERMINATION OF CAUSAL RELATIONSHIP BETWEEN PHOSPHORUS AND BRACT EDGE BURN OF POINSETTIAS." HortScience 28, no. 5 (1993): 550a—550. http://dx.doi.org/10.21273/hortsci.28.5.550a.

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Increasing rates of triple superphosphate added to the root media have a positive correlation with bract edge burn on poinsettias (Whipker, Hammer,1992). We have studied the effects of application of increasing rates of phosphorus supplied from multiple sources. Analysis of P content and other elements were conducted on root media and foliar samples to determine source of toxicity.Euphorbia pulcherrrima Willd. cultivars Dark Red Hegg and Red Sails were potted on September 8, 1992 in a root medium of peat, perlite and soil (40:40:20, v/v) mixture amended with N, K, Ca and micronutrients. Prior

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33

Bolland, MDA, BH Paynter, and MJ Baker. "Increasing phosphorus concentration in lupin seed increases grain yield on phosphorus deficient soil." Australian Journal of Experimental Agriculture 29, no. 6 (1989): 797. http://dx.doi.org/10.1071/ea9890797.

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In a field experiment on a phosphorus (P) deficient soil in south-western Australia, lupin seed (Lupinus angustifolius cv. Danja) of the same size (157 mg/seed) but with 2 different phosphorus (P) concentrations in the seed (2.0 and 2.8 g P/kg) was sown with 4 levels of superphosphate (5, 20, 40 and 60 kg P/ha) drilled with the seed in May 1988 to examine the effect of seed P concentration on subsequent dry matter (DM) and grain yields. Increasing the amount of superphosphate applied from 5 to 60 kg P/ha almost doubled yields. In addition, lupins grown from seed containing the higher P concent

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Gilbert, MA, KA Shaw, JD Armour, JK Teitzel, and J. Standley. "Low effectiveness of Duchess rock phosphate on pastures in northern Queensland." Australian Journal of Experimental Agriculture 30, no. 1 (1990): 61. http://dx.doi.org/10.1071/ea9900061.

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Rock phosphate from Duchess, northeastern Australia, and superphosphate were compared as phosphorus (P) sources for pasture in glasshouse and field experiments in northern Queensland. Duchess rock phosphate was an inferior source of P for pastures, compared with superphosphate. The yield response to rock phosphate, however, varied between soils. On strongly acidic soils with high P sorption capacity, rock phosphate increased yield and bicarbonate-extractable P in the soil. On near neutral soils of low P sorption capacity, rock phosphate had little effect on yield. When the rate of rock phospha

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35

Weaver, DM, GSP Ritchie, GC Anderson, and DM Deeley. "Phosphorus leaching in sandy soils .I. Short-term effects of fertilizer applications and environmental conditions." Soil Research 26, no. 1 (1988): 177. http://dx.doi.org/10.1071/sr9880177.

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The consequences of previous as well as current environmental conditions and management practices on the potential for phosphorus (P) to be lost by drainage from sandy soils in the short term (< 1 year) were studied in the laboratory and the field. The potential for P losses by drainage was estimated by measuring soil solution P levels and rapidly released P. Rapidly released P was measured by determining the concentration of dissolved inorganic P contained in filtered (<0.45 pm) soil solutions after incubating soil at saturation for 15 min at ambient temperature. In the laboratory, sand

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36

Simon, A., and AD Rovira. "The influence of phosphate fertilizer on the growth and yield of wheat in soil infested with cereal cyst nematode (Heterodera avenae Woll.)." Australian Journal of Experimental Agriculture 25, no. 1 (1985): 191. http://dx.doi.org/10.1071/ea9850191.

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In a field experiment, the numbers of immature females of cereal cyst nematode (Heterodera avenae Woll.) on roots of wheat at anthesis were 14 1, 220 and 324 per plant with 0, 100 and 400 kg/ha superphosphate respectively. The field site, with an average annual rainfall of 450 mm, was located at Coonalpyn, S.A. (35�4 1'S., 139� 52'E.) on a grey-brown, calcareous, loamy earth. Wheat seedlings were grown under controlled environment conditions in two soils with identical chemical and physical properties, but with initial populations of H. avenae of 1.1 and 5.8 eggs/g soil to study the response i

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37

Wang, S., X. Liang, G. Liu, et al. "Phosphorus loss potential and phosphatase activities in paddy soils." Plant, Soil and Environment 59, No. 11 (2013): 530–36. http://dx.doi.org/10.17221/626/2013-pse.

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The effects of phosphorus (P) fertilizer on P loss potential, soil Olsen-P and neutral phosphatase activities in paddy soils fertilized with superphosphate or pig manure (PM) were evaluated in this paper. Data were collected from a field experiment in the Tai Lake Basin, China. Superphosphate rates were 0, 17.5, 26.7, and 35.0 kg P/ha, and PM rates were 0, 1.4, 2.1, and 2.8 t/ha for each crop, respectively. Soil Olsen-P in the plow layer increased to a greater extent with PM than with superphosphate. Pig manure increased neutral phosphatase activities in the plow layer compared with PM-free tr

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38

DICKSON, J., and K. R. MULLINS. "Suspected superphosphate poisoning in calves." Australian Veterinary Journal 64, no. 12 (1987): 387–88. http://dx.doi.org/10.1111/j.1751-0813.1987.tb09614.x.

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Roy, B., and J. N. Jha. "Effect of Treating Single Superphosphate with Cowdung." International Rice Research Newsletter 12, no. 2 (1987): 43. https://doi.org/10.5281/zenodo.7122561.

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This article 'Effect of Treating Single Superphosphate with Cowdung' appeared in the International Rice Research Newsletter series, created by the International Rice Research Institute (IRRI). The primary objective of this publication was to expedite communication among scientists concerned with the development of improved technology for rice and for rice based cropping systems. This publication will report what scientists are doing to increase the production of rice in as much as this crop feeds the most densely populated and land scarce nations in the world.

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40

Otaboev, Kh, D. Sherkuziev, Sh Namazov, R. Radjabov, and A. Seytnazarov. "Flow of simple superphosphate using two-stage decomposition of phosphorite." IOP Conference Series: Earth and Environmental Science 939, no. 1 (2021): 012055. http://dx.doi.org/10.1088/1755-1315/939/1/012055.

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Abstract The methods for producing simple superphosphate by two-stage sulfuric acid decomposition of natural phosphates are analyzed. For the first stage, the process of decomposition of high-carbonate powdered phosphorite is studied depending on the rate of sulfuric acid from stoichiometry to the formation of H3PO4, its concentration and the reaction time of the starting components. For the second stage, the process of neutralization of phosphoric acid is studied, depending on the norm of phosphate rock for the formation of Ca(H2PO4)2. The drying process of superphosphate is carried out, in w

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41

J.S, DASALKAR, RUDRAKSHA G.B, LAWAND B.T, and RACHEWAD S.N. "RESPONSE OF SORGHUM-WHEAT ROTATION TO DIFFERENT SOURCES OF ZINC IN VERTISOL." Madras Agricultural Journal 81, Augest (1994): 415–17. http://dx.doi.org/10.29321/maj.10.a01548.

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A field experiment was conducted to study the efficiency of different sources of zinc in sorghum-wheat crop rotation on calcareous vertisol of Parbhani. Zinc application 4kg Zn/ha through zincated superphosphate proved its superiority over other zine sources in producing grain and fodder yield of sorghum. Among the zine snurces, the residual effect of zincated superphosphate was significantly higher in producing grain and straw yield of wheat followed by farm yard manure and zinc sulphate. Zinc application @ 4kg Za/ha through different Zinc sources significantly increased uptake of Zn.N and P

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Horsnell, LJ. "The growth of improved pastures on acid soils. 1. The effect of superphosphate and lime on soil pH and on the establishment and growth of phalaris and lucerne." Australian Journal of Experimental Agriculture 25, no. 1 (1985): 149. http://dx.doi.org/10.1071/ea9850149.

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The response of improved pastures to the application of superphosphate is low on the acid sedimentary soils, of the Southern Tablelands of New South Wales, which contain high levels of exchangeable aluminium. An investigation was made into the effect of surface-applied fertilizers on soil pH and on the establishment and growth of lucerne and phalaris on these soils. At 6 weeks after the application of gypsum, superphosphate, or superphosphate plus potassium sulfate, soil pH (H2O) had decreased markedly. This effect extended to a depth of 20 cm, but decreased with time. Initially, lime applicat

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Souza, Henrique Antunes de, Maria Diana Melo Araújo, Vinícius de Melo Benites, et al. "Agronomic Efficiency and Productivity of Sorghum in Response to Fertilizers With Different Phosphorus Solubilities in Greenhouse Conditions." Journal of Agricultural Science 11, no. 17 (2019): 177. http://dx.doi.org/10.5539/jas.v11n17p177.

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The experiment was conducted under controlled conditions in the municipality of Sobral, Cear&aacute;, Brazil, to evaluate the agronomic efficiency of phosphate fertilizers with different solubilities on the cultivation of sorghum in a Luvisol. The experimental design comprised randomized blocks in a 2 &times; 6 factorial scheme (two genotypes and five phosphorus treatments plus the control, without phosphorus). The treatments were: monoammonium phosphate, triple superphosphate, sheep manure, organic compost based on livestock residues, and organomineral fertilizer. Three blocks were us

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Cao, Jie, Ruirong Li, Haoli Qu, et al. "Effects of the membrane-covered technology and superphosphate on the compost quality and nitrogen-containing gas emissions during aerobic composting." BioResources 17, no. 1 (2022): 1781–93. http://dx.doi.org/10.15376/biores.17.1.1781-1793.

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A lab-scale experiment was conducted to assess effects of the membrane-covered technology and superphosphate on the compost quality and emissions of nitrogen-containing gases during aerobic composting. The results showed that the membrane-covered technology increased the temperature of the compost pile and accelerated degradation of organic matter. The membrane-covered (T1) sample attained a germination index (GI) of 50% and 80%, approximately 2 and 9 d earlier, respectively, relative to the control (CK) sample. However, the application of superphosphate might have an adverse effect on the GI

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Bolland, M. D. A., M. F. Clarke, and J. S. Yeates. "Effectiveness of rock phosphate, coastal superphosphate and single superphosphate for pasture on deep sandy soils." Fertilizer Research 41, no. 2 (1995): 129–43. http://dx.doi.org/10.1007/bf00750755.

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Bolland, M. D. A., J. S. Yeates, and M. F. Clarke. "Comparing different sources of sulfur for high-rainfall pastures insouth-western Australia." Australian Journal of Experimental Agriculture 43, no. 10 (2003): 1221. http://dx.doi.org/10.1071/ea02146.

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The dry herbage yield increase (response) of subterranean clover (Trifolium subterraneum L.)-based pasture (>85% clover) to applications of different sources of sulfur (S) was compared in 7 field experiments on very sandy soils in the > 650 mm annual average rainfall areas of south-western Australia where S deficiency of clover is common when pastures grow rapidly during spring (August–November). The sources compared were single superphosphate, finely grained and coarsely grained gypsum from deposits in south-western Australia, and elemental S. All sources were broadcast (topdressed) onc

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Bolland, MDA. "Residual value of phosphorus from superphosphate for wheat grown on soils of contrasting texture near Esperance, Western Australia." Australian Journal of Experimental Agriculture 26, no. 2 (1986): 209. http://dx.doi.org/10.1071/ea9860209.

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The residual value for wheat of phosphorus (P) from superphosphate was measured in field experiments on two texture-contrast (duplex) soils near Esperance, Western Australia. Superphosphate was applied to previously untreated plots once only, in 1980, 198 1, 1982 or 1983. The residual value of this P was measured in 1983 relative to P applied in 1983. Results were similar for both soils. Superphosphate applied in previous years did not produce the same yield as superphosphate applied in the current year. As calculated from yield response, relative effectiveness was 65, 42 or 32% after 1, 2 and

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48

Mthimunye, Latoya Miranda, Gudani Millicent Managa, and Lufuno Ethel Nemadodzi. "The Influence of Lablab Purpureus Growth on Nitrogen Availability and Mineral Composition Concentration in Nutrient Poor Savanna Soils." Agronomy 13, no. 3 (2023): 622. http://dx.doi.org/10.3390/agronomy13030622.

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Low soil fertility in savanna soils has been linked to low crop yields, with nitrogen being the most limiting factor in crop yield. Soil used in this pot experiment was obtained from Motshephiri village with low total N, low NO3− and high NH4+. A pot experiment was conducted in a greenhouse laid in a Randomized Complete Block Design with four treatments (1) control, (2) Bradyrhizobium japonicum inoculant, (3) superphosphate and (4) Bradyrhizobium japonicum inoculant + superphosphate). The superphosphate was applied at three different levels (45, 60 and 75 kg/ha). Lablab was cultivated in each

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49

Simpson, P. G., P. W. G. Sale, and S. B. Tennakoon. "An economic analysis of the field performance of North Carolina reactive phosphate rock compared with single superphosphate for selected sites from the National Reactive Phosphate Rock Project." Australian Journal of Experimental Agriculture 37, no. 8 (1997): 1061. http://dx.doi.org/10.1071/ea96120.

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Summary. An economic analysis was undertaken using pasture yield data from 8 selected sites from the National Reactive Phosphate Rock Project, that encompassed 7 different performance scenarios for North Carolina phosphate rock. The aims were to determine whether the use of North Carolina phosphate rock in place of single superphosphate might result in a positive financial benefit in the 4th year, and after 4 years of annual applications of fertiliser. The analysis was carried out using annual P applications of North Carolina phosphate rock and single superphosphate, that resulted in pasture y

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Oliveira, Rafael Carvalho de, Luciano da Fontoura Costa, Evandro Abreu Fernandes, Bauer Oliveira e. Alvarenga, Sérgio Russo Matioli, and Marcelo Emílio Beletti. "Bone histomorphometry of broilers submitted to different phosphorus sources in growing and finisher rations." Pesquisa Agropecuária Brasileira 41, no. 10 (2006): 1517–23. http://dx.doi.org/10.1590/s0100-204x2006001000009.

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The objective of this work was to identify alterations in the histomorphology of the cortical bone tissue of broilers submitted to growing and finisher rations formulated with five different sources of phosphorus: dicalcium phosphate, simple superphosphate, triple superphosphate, monoammonium phosphate and Araxá rock phosphate. Histological images had their components segmented, and were called regions of interest (ROI). Images were analyzed through developed algorithms, using the SCILAB mathematical environment. Eleven features were considered in order to obtain a complete description of the

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