Developments in Production of Granular Urea-Ammonium Phosphate Fertilizers

1968 ◽  
Vol 7 (1) ◽  
pp. 124-133 ◽  
Author(s):  
R. S. Meline ◽  
G. C. Hicks ◽  
T. M. Kelso ◽  
M. M. Norton
Keyword(s):  
Ammonium Phosphate ◽  
Phosphate Fertilizers

Poorly soluble, iron-aluminium phosphates in ammonium phosphate fertilizers: Their nature and availability to plants

Soil Research ◽  
1983 ◽  
Vol 21 (2) ◽  
pp. 183 ◽  
Author(s):  
RJ Gilkes ◽  
P Mangano
Keyword(s):  
Total Phosphorus ◽  
Powder Diffraction ◽  
Phosphorus Content ◽  
Ammonium Phosphate ◽  
Residual Value ◽  
Phosphate Fertilizers ◽  
Total Phosphorus Content ◽  
X Ray ◽  
Poorly Soluble ◽  
Residual Effectiveness

Both monoammonium and diammonium phosphate fertilizers contain various (Ca,Mg)(NH4)- (Fe,Al)(PO4)(F,OH)H2O compounds that are insoluble in water and comprise 4.9-9.9% of the total phosphorus content of the fertilizers. The compounds have been isolated and characterized by chemical, X-ray powder diffraction, ix., and thermogravimetric techniques. The compounds are only 35-60% as effective as monocalcium phosphate (MCP) in supplying phosphorus to wheat grown under glasshouse conditions. The residual effectiveness of the compounds for a second crop of wheat was generally lower (10-20% relative to freshly applied MCP) than the residual value of MCP (20 %).

Evaluation of phosphate fertilizers. III. Immediate and residual values of potassium metaphosphate and magnesium ammonium phosphate for potatoes, radishes, barley and ryegrass

1971 ◽  
Vol 76 (1) ◽  
pp. 131-141 ◽  
Author(s):  
G. E. G. Mattingly ◽  
A. Penny ◽  
Marie Blakemore
Keyword(s):  
Acid Soils ◽  
Ammonium Phosphate ◽  
Residual Effects ◽  
Triple Superphosphate ◽  
Final Test ◽  
Phosphate Fertilizers ◽  
Magnesium Ammonium Phosphate ◽  
Magnesium Ammonium ◽  
Residual Values ◽  
Soluble P

SUMMARYTriple superphosphate (21.6% P), potassium metaphosphate (25.0% P) and magnesium ammonium phosphate (19.0% P) were compared as phosphate fertilizers alone and in combination, and as powders and granules, in two experiments on acid soils. Basal nutrients were adjusted to allow for the amounts of N, K, and Mg in the test fertilizers. Immediate effects of the fertilizers were measured by early potatoes and barley, and residual effects by radishes and ryegrass.All powdered fertilizers, alone or in combination, were equivalent to powdered superphosphate for early potatoes. The value of granular fertilizers for potatoes increased with the proportion of superphosphate in the mixtures. Superphosphate equivalents of the granular fertilizers were: magnesium ammonium phosphate, 14%; potassium metaphosphate + magnesium ammonium phosphate, 36%; potassium metaphosphate, 53%; superphosphate + potassium metaphosphate + magnesium ammonium phosphate, 54%; superphosphate + magnesium ammonium phosphate, 60%; superphosphate + potassium metaphosphate, 81%.Residues from powdered fertilizers, applied to potatoes, were equivalent, for radishes, to residues from powdered superphosphate. Residues from granular fertilizers were more effective for radishes than residues from powders.All powdered fertilizers were equivalent to powdered superphosphate for barley cut green. Granular magnesium ammonium phosphate, either alone or mixed with potassium metaphosphate, was slightly less effective than powder.Residues from all powdered fertilizers applied to barley were equivalent for ryegrass. Residues from granular fertilizers, especially potassium metaphosphate and magnesium ammonium phosphate, produced more grass than residues from powders.Apparent recoveries of P by the four crops ranged from 24% to 32% and were more from granules than from powders. Residues from all fertilizers increased 0.5M-NaHCO3-soluble P in soils, and mean yields of ryegrass, the final test crop, increased by 3.2 to 5.1 cwt dry matter/acre/ppm NaHCO3-soluble P in the soils.

scholarly journals Enhanced efficiency of phosphorus fertilizer in soybean and maize

2019 ◽  
pp. 1638-1642
Author(s):  
Adilson Pelá ◽  
Rafael Umbelino Bento ◽  
Lucas Brennon Romão Crispim ◽  
Roberto dos Anjos Reis Jr
Keyword(s):  
Morphological Characteristics ◽  
Ammonium Phosphate ◽  
Tropical Soils ◽  
Fertilizer Efficiency ◽  
Phosphorus Fertilizer ◽  
P Fertilization ◽  
Phosphate Fertilizers ◽  
Agronomic Efficiency ◽  
P Fertilizer ◽  
Fertilization Experiments

Soybeans and maize are the most cultivated crops in tropical soils and require large amounts of phosphate fertilizers. The use of enhanced-efficiency fertilizers is a promising technology to minimize losses of P by fixation in highly weathered tropical soils. The objectives of this study were to evaluate morphological characteristics, soybean P and boron foliar content, yield and agronomic efficiency of P fertilizer in response to P rates and sources in maize and soybean crops. Two P fertilization experiments with the sources Mono-ammonium Phosphate (MAP) and Policote coated MAP were carried out, one in maize (0, 20, 40, 80, 120 and 160 kg P2O5 ha-1) and another in soybean crop (0, 20, 40, 80 and 120 kg P2O5 ha-1). The morphological characteristics, soybean P and boron foliar content, yield and agronomic P fertilizer efficiency were evaluated. The results showed that maize and soybean morphological characteristics, as well as soybean foliar P and boron contents were not influenced by fertilization. P fertilization increased soybean yield. Policote coated MAP was more efficient than MAP (conventional fertilizer) to produce higher maize and soybean yields and higher agronomic efficiency of P use. For higher productivity, we recommend the dose of 102.9 kg P2O5 ha-1 of Policote coated MAP for soybean and 97.6 kg P2O5 ha-1 for maize.

Caking in ammonium phosphate fertilizers

1969 ◽  
Vol 17 (6) ◽  
pp. 1279-1283 ◽  
Author(s):  
Gerald L. Tucker ◽  
Leland Frederic Roy
Keyword(s):  
Ammonium Phosphate ◽  
Phosphate Fertilizers

YIELD AND COMPOSITION OF BROMEGRASS-ALFALFA AS AFFECTED BY AMMONIUM NITRATE AND AMMONIUM PHOSPHATE FERTILIZERS

1983 ◽  
Vol 63 (1) ◽  
pp. 169-172
Author(s):  
N. W. HOLT
Keyword(s):  
Ammonium Nitrate ◽  
Nitrogen Fertilizer ◽  
Dry Matter ◽  
Ammonium Phosphate ◽  
Dry Matter Yield ◽  
Monoammonium Phosphate ◽  
Phosphate Fertilizers ◽  
Total Uptake ◽  
Soil Zone ◽  
Fertilizer Rates

Nitrogen (N) fertilizer at rates to 44 kg/ha increased the dry matter yield of bromegrass-alfalfa at all levels of monoammonium phosphate application. Nitrogen fertilizer increased the yield of the grass and decreased the yield of alfalfa. As a result, N content of the forage was generally decreased while total uptake of nitrogen was increased with fertilizer. Rates of N to 22 kg∙ha−1∙yr−1 did not result in an accumulation of NO3–N in the 0- to 30-cm soil zone while higher rates only marginally increased soil NO3–N.Key words: Bromegrass, alfalfa, fertilizer

THE EFFECT OF FERTILIZERS ON EMERGENCE OF CEREAL GRAINS, FLAX AND RAPE

1961 ◽  
Vol 41 (1) ◽  
pp. 89-98 ◽  
Author(s):  
M. Nyborg
Keyword(s):  
Soil Moisture ◽  
Moisture Content ◽  
Soil Temperature ◽  
Ammonium Nitrate ◽  
Nitrogen Fertilizer ◽  
Soil Moisture Content ◽  
Ammonium Phosphate ◽  
Cereal Grains ◽  
Phosphate Fertilizers

Ammonium nitrate, ammonium phosphate and treble superphosphate fertilizers placed in a band with seeds of wheat, oats, barley, flax and rape were found to delay and/or reduce emergence. Order of tolerance of these crops was oats > barley > wheat >> rape > flax. The nitrogen fertilizer was more injurious than the two phosphate fertilizers, when applied on the basis of N and P2O5 content, respectively. Injury to emergence increased with lower soil temperature. This effect was greatest with treble superphosphate and was only slight with ammonium nitrate. Injury to emergence increased with lower soil moisture content. This effect was very marked with ammonium nitrate but was less with treble superphosphate. For wheat, oats and barley, delay in emergence was more pronounced than reduction. However, for flax and rape relatively light applications of fertilizers both delayed and reduced emergence and exposure of seeds to fertilizer in soils of low moisture content rapidly reduced ability to germinate. Damage to flax was apparently increased by soil micro-organisms.Injury to emergence was eliminated when fertilizers were broadcast or placed in a band one inch or more away from the seed.

scholarly journals Influence of phosphorus fertilizers of various composition on the yield of tomato crops and control of their consumption by plants

2021 ◽  
Vol 937 (2) ◽  
pp. 022131
Author(s):  
N Bagnavets ◽  
A Zhevnerov ◽  
M Grigoryeva ◽  
T Pshenichkina
Keyword(s):  
Phosphoric Acid ◽  
Ammonium Phosphate ◽  
Greenhouse Experiment ◽  
Phosphate Fertilizers ◽  
Tomato Crop ◽  
Magnesium Ammonium Phosphate ◽  
Phosphate Ions ◽  
Magnesium Ammonium ◽  
And Control

Abstract Phosphate fertilizers are widely used for growing crops. To obtain phosphoric fertilizers, phosphoric acid purified using organic solvents, one of which is 100% tributyl phosphate, is used. The authors of the paper have chosen this solvent to obtain purified phosphoric acid. Purification from impurities included the stages of extraction and reextraction. On the basis of the re-extract and chemically pure phosphoric acid, a phosphoric fertilizer magnesium-ammonium phosphate (MgNH4PO4) was synthesized and used in the greenhouse experiment. The greenhouse experiment consisted in growing a tomato crop included three options for fertilization. A comparative analysis of the stimulating effect of magnesium-ammonium phosphate, synthesized with the use of phosphoric acid of varying degrees of purification, on the yield of tomato culture has been carried out.The paper proposes a blister-colorimetric version of the determination of phosphate ions in a blister cell containing a mixture of dry reagents in the form of a bulk. The optimal conditions for carrying out colorimetry have been selected. The proposed method makes it possible to semi-quantitatively determine phosphorus in various objects without preparing reagent solutions, using a bulk packed in an ampoule or blister, and can be used to control phosphorus consumption by plants, which, in turn, allows regulating the introduction of nutrients in the form of dressings.

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