| 6,225,258 | Controlled release pesticide and fertilizer briquettes |
| 6,120,574 | Slow release fertilizer spike |
| 6,080,221 | Vacuum coated particulate fertilizers |
| 6,048,378 | Highly available particulate controlled release nitrogen fertilizer |
| 6,045,810 | Reinforced-resin coated plant food granules |
| 5,449,394 | Nonpolymeric condensed ammonia, urea, formaldehyde liquid fertilizer |
| 5,411,568 | Highly available waste based nitrogen fertilizer |
| 5,374,294 | Controlled release potassium divalent metal phosphate fertilizer |
| 5,354,350 | Citrate soluble slow release iron humate |
| 5,308,373 | Metal ammonium phosphate-alkylene urea buffered fertilizer |
| 5,266,097 | Aminoureaformaldehyde fertilizer method and composition |
| 5,240,490 | Non-destructive recovery of natural nitrogen products |
| 5,125,952 | Storage-stable melamine dispersion |
| 5,021,247 | High integrity natural nitrogenous granules for agriculture |
| 5,021,077 | High integrity natural nitrogenous granules for agriculture |
| 4,997,469 | High integrity, low odor, natural based nitrogenous granules for agriculture |
| 4,969,947 | One-step method of coating nutrient particles |
| 4,804,403 | Attrition-resistant, controlled release fertilizers |
| 4,781,749 | Polymethylene urea fertilizer solution |
| 4,711,659 | Attrition resistant controlled release fertilizers |
| 4,579,580 | Urea-methylolurea plant food composition |
| 4,578,105 | Stable ureaform dispersion fertilizers |
| 4,519,831 | Method of converting sewage sludge to fertilizer |
| RE31,801 | Urea-formaldehyde solution for foliar fertilization |
| 4,483,877 | Method of producing silage |
| 4,427,719 | Method of dedusting metal sulfate granules |
| 4,304,588 | Foliar feed compositions |
| 4,297,130 | Method for increasing the number of pods in legumes by foliar feeding |
| 4,244,727 | Urea-formaldehyde solution for foliar fertilization |
| 4,145,207 | Preparation of improved foliar fertilizer |
| 4,033,745 | Non-burning storable liquid fertilizer |
| 3,970,625 | Production of urea-formaldehyde concentrates |
| 3,939,255 | Process for production of ammonium polyphosphates |
| 3,933,459 | High-magnesium ammonium polyphosphate solutions |
