Controlled release fertilizer
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United States of America Patent
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Aug 11, 1992
Grant Date -
N/A
app pub date -
Jan 28, 1991
filing date -
Jan 28, 1991
priority date (Note) -
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Abstract
A biologically controlled release coating for fertilizer comprises from 60 to 97 weight % of a waxy substance and from 40 to 3 weight % or a rosin or dimerized rosin having at least 70 weight % of resinic acids having conjugated double bonds and dimerized rosin with its derivatives thereof. Such coatings have a resin character to giver fertilizer prills which do not break on handling yet break down in response to the biological needs of the plant.
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Cited Art Landscape
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