Spray tank additives for use on agricultural crops, namely, nitrogen stabilizers and nitrification inhibitors; Agricultural chemicals, namely, additives for use as nitrogen stabilizers and nitrification inhibitors in liquid fertilizer for agricultural crops; Agricultural chemicals for promoting crop growth; Agricultural soil conditioners, namely, chemicals for reducing nitrogen loss, increasing nitrogen availability, and increasing nitrogen uptake by crops, except fungicides, herbicides, insecticides and parasiticides; nitrogen stabilizers for agricultural use; nitrification inhibitors in the nature of soil conditioners for agricultural purposes for reducing the rate at which ammonium is converted to nitrate; chemicals, namely, additives for use as nitrogen