PURIC® ZINC PRIME MAX is designed for application to the soil. PURIC ZINC PRIME MAX is highly effective under adverse soil conditions unlike inorganic zinc compounds that are tied-up and unavailable to the plant. These adverse conditions include: high phosphate soil levels, high pH (alkaline), high salinity, high carbonate levels, and clay soils (adsorption). EDTA products may be applied separately or in combination with fertilizers or pesticides. PURIC ZINC PRIME MAX is recommended for soil application only.