Slow-release fertilizer
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United States of America Patent
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Jul 18, 1995
Issued Date -
N/A
app pub date -
May 2, 1994
filing date -
Oct 16, 1992
priority date (Note) -
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Abstract
A synthetic apatite containing agronutrients and a method for making the apatite are disclosed. The apatite comprises crystalline calcium phosphate having agronutrients dispersed in the crystalline structure. The agronutrients can comprise potassium, magnesium, sulfur, iron, manganese, molybdenum, chlorine, boron, copper and zinc in amounts suited for plant growth. The apatite can optionally comprise a carbonate and/or silicon solubility control agent. The agronutrients are released slowly as the apatite dissolves.
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