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Compaction of metal salt-urea complexes with triple superphosphate

Published on Jan 1, 1987in Nutrient Cycling in Agroecosystems2.848
· DOI :10.1007/BF01066611
S. H. Chien23
Estimated H-index: 23
(International Fertilizer Development Center),
C. B. Christianson8
Estimated H-index: 8
(International Fertilizer Development Center)
+ 1 AuthorsG. E. Peters1
Estimated H-index: 1
(International Fertilizer Development Center)
Abstract
It has been the experience of the fertilizer industry that urea should not be cogranulated or blended with superphosphate because urea reacts with monocalcium phosphate monohydrate (MCP·H2O) in superphosphate to form an adduct. This reaction releases the water of hydration and causes the product to become wet and sticky or severely caked during storage. The objectives of this study were [1] to test the feasibility of preventing or retarding the reaction by complexing the urea with various salt hydrates and [2] to measure ammonia volatilization from metal salt-urea complexes on the soil surface.
  • References (5)
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#1M.S. Lupin (International Fertilizer Development Center)H-Index: 1
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Abstract The thermal decomposition of the urea complexes Al(urea) 6 (NO 3 ) 3 , Fe(urea) 6 (NO 3 ) 3 and Mn(urea) 4 Cl 2 have been studied in air and argon by simultaneous recording of thermogravimetric (TG), differential thermal gravimetric (DTG) and differential thermal analysis (DTA) curves. The metal oxides formed by the decompositions have been identified by X-ray powder diffraction and decomposition stoichiometries have been proposed and discussed.
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Ammonia volatilization from urea-treated soils was estimated under field and laboratory conditions. Acid-washed filter papers were hung in the air in a spruce stand treated with N and P fertilizers in a factorial design. In the laboratory, moss sods were incubated to quantify ammonia volatilization.
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#1Kwang Seop KimH-Index: 1
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Massive intercalation of urea into montmorillonite (MUCH) was recently proposed to enhance urea use efficiency through smart suppression of emission of NH3 and NOx. This study was to synthesize citrate-incorporated MUCH (Cit-MUCH) which can enhance suppression of NH₃ volatilization. The XRD pattern of Cit-MUCH was very similar to that of MUCH to indicate successful incorporation of citric acid into MUCH. Incorporation of citric acid was confirmed by the existence of COO- symmetric stretching vib...
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#1Mohammad PessarakliH-Index: 28
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The purpose of this review article is to provide clear and brief information on the effects of fertigation, mulches, and CO 2 enrichment on eggplant production. Fertigation has two major advantages (1) saving labor and expenses, and (2) provides the plants with more efficient and more effective chance of using the nutrients. Mulches used in home gardening or for commercial vegetable production, including eggplant, increase plant growth, hasten maturity and increase crop yields. A substantial inc...
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#1D. S. Ouyang (McGill University)H-Index: 1
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Phosphorus fixation results in low P use efficiency in acid soils. Increase in soil pH through urea hydrolysis may improve P availability and use efficiency. Growth chamber and field experiments were conducted to evaluate effects of urea on triple superphosphate (TSP) transformation and P use efficiency. A Ste. Rosalie clay (Typic Humaquept), an Ormstown silty clay loam (Typic Humaquept) and a Chicot sandy clay loam (Typic Hapludalf) were used in the growth chamber experiment with three rates of...
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Abstract The extent of ammonia (NH3) volatilization from surface‐applied urea to sugar beet and effects of NBPT [N‐(n‐butyl) thiophosphoric triamide] PG (phosphogypsum), PR (by‐product‐pyrite) and KCl (potassium chloride) on NH3 volatilization, nitrogen (N) content of leaf blades and petioles, sugar, amine N, and refined sugar contents, and root and refined sugar yields were determined in the field. Total NH3 loss varied from 7.0% to 23.6% depending on the compounds incorporated with urea and ra...
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#1M. X. Fan (McGill University)H-Index: 3
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Applying urea with acidic phosphate fertlizer increases urea fertilizer efficiency by reducing ammonia volatilization and toxicity to crop from urea hydrolysis. However, urea and triple superphosphate (TSP) are not recommended to be cogranulated because blends might become wet and sticky. Monoammonium phosphate (MAP) is a less acidic P source than TSP, but is compatible with urea. The objective of this study was to evaluate compound NP fertilizer products made from MAP and TSP combinations as P ...
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Abstract Ammonia (NH3) volatilization losses from surface‐applied ammonium sulphate (AS), ammonium nitrate (AN), and urea to winter wheat and the effects of the NBPT [N‐(n‐butyl) thiophosphoric triamide], PG (Phospho‐gypsum), and PR (byproduct‐Pyrite) were determined in a field experiment. Effects on grain yield and protein content of the grain were also measured. Total NH3 losses from AS, AN, and urea varied from 13.6–19.5%, 4.4–6.4%, and 3.9–12.0% depending on the compounds and their levels ad...
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