Abstract: 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.

Abstract: High analysis fertilizer formulations of a low bulk density powdered ureaformaldehyde, having soluble and insoluble components combined with soluble monopotassium phosphate and polyamino acid in which the resulting mixtures are dry homogeneous blends and may be carried in liquid for application to surface or subsurface areas by conventional liquid fertilizer applying equipment.

Abstract: High analysis fertilizer formulations of a low bulk density powdered ureaformaldehyde, having soluble and insoluble components combined with soluble monopotassium phosphate and polyamino acid in which the resulting mixtures are dry homogeneous blends and may be carried in liquid for application to surface or subsurface areas by conventional liquid fertilizer applying equipment.

Abstract: High analysis fertilizer formulations of a low bulk density powdered ureaformaldehyde, having soluble and insoluble components combined with soluble monopotassium phosphate and polyamino acid in which the resulting mixtures are dry homogeneous blends and may be carried in liquid for application to surface or subsurface areas by conventional liquid fertilizer applying equipment.

Abstract: A tree injection device including a piston slidably received within a cylinder to define a piston chamber and a rack chamber within the cylinder, a reservoir in fluid communication with the piston chamber, wherein a first check valve allows fluid to pass from the reservoir to the piston chamber while substantially preventing fluid from passing from the piston chamber to the reservoir, an injector in fluid communication with the piston chamber, the injector being adapted for insertion into a tree, wherein a second check valve allows fluid to pass from the piston chamber to the injector, while substantially preventing fluid from passing from the injector to the piston chamber and a motor operatively connected to the piston to advance the piston through the cylinder.