Urea-formaldehyde solution for foliar fertilization
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United States of America
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Jan 15, 1985
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Nov 15, 1982
filing date -
Feb 7, 1979
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Abstract
A clear, storable, aqueous solution of partially condensed urea and formaldehyde substantially free of formic acid supplies non-burning and slow-releasing plant food nitrogen when applied directly to the foliage of living grasses, and agricultural and ornamental plants or to soils having neutral or acid surfaces. The substantially ammonia free solution has a pH between 7.5 and 9.8 and contains added buffering agents so that between 0.05 and 0.30 milliequivalents of phosphoric acid are required to reduce pH of one gram to 7.0; and is prepared by the partial condensation of from 1.5 to 2.0 mols urea with 1.0 mol formaldehyde for 20 to 300 minutes at temperatures between 75.degree. and 90.degree. C. with between 0.05 and 0.3 milliequivalents of alkali hydroxide per gram of solution as catalyst.
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Cited Art Landscape
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