Controlled release fertilizer having improved mechanical handling durability and method for production thereof
First Claim
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1. A controlled release fertilizer material comprising a particulate plant nutrient surrounded by protective coating which comprises a particulate filler.
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Abstract
A controlled release fertilizer material comprising a particulate plant nutrient surrounded by a protective coating comprising at least one substantially homogeneous layer of a urethane-containing compound and a filler(s). An organic additive(s) may or may not be present.
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61 Claims
- 1. A controlled release fertilizer material comprising a particulate plant nutrient surrounded by protective coating which comprises a particulate filler.
- 50. A process for producing a controlled release fertilizer material comprising the step of contacting a particulate plant nutrient with a protective coating comprising a particulate filler material to surround the particulate plant nutrient.
Specification