20120210760 | PHOSPHORUS-FREE OR LOW PHOSPHORUS FERTILIZER - Phosphorus-free or low phosphorus fertilizer compositions containing a polyamino acid salt. The fertilizer formulations disclosed herein contain a nitrogen source, a potassium source, a polyamino acid salt and in some cases a low level source of phosphorus. The compositions may be in the form dry homogeneous blends and may be carried in liquid for application to surface or subsurface areas by conventional liquid fertilizer applying equipment. | 08-23-2012 |