Patent ID: 7468087

Claim:
A fertilizer comprising a sparingly water-soluble phosphatic fertilizer and a urea/aliphatic aldehyde condensation product other than urea/formaldehyde condensation product, and optionally a water-soluble phosphoric acid, wherein the sparingly water-soluble phosphatic fertilizer has elution characteristics where after 2 grams of the sparingly water-soluble phosphatic fertilizer is dipped in 150 milliliters of a 2 weight percent aqueous solution of citric acid at 30° C., the time required to allow elution of 80 weight percent of phosphate components contained in the phosphatic fertilizer into the aqueous solution of citric acid ranges from 0.1 to 2000 minutes and the ratio of the sparingly water-soluble phosphatic fertilizer in conversion to P 2 O 5 to the urea/aliphatic aldehyde condensation product ranges from 0.01 to 5 weight percent.