Compositions and Methods for Coating of Nitrification Inhibitors with a Solution Containing a High Concentration of Urease Inhibitors and For Improved Retention of the Nitrogen Content of Soil Through the Administration of Liquid Delivery Formulations of (Aminomethylene)Phosphinic Acids and/or their Salts

An inhibited fertilizer composition comprising:

• a) one or more nitrogen sources,
• b) a non-aqueous liquid solution,
• wherein the one or more nitrogen sources are selected from the group consisting of:
• urea, manure, compost, urea formaldehyde reaction products, and
• urea/ammonia/formaldehyde reaction products;
• wherein the non-aqueous liquid solution comprises:
• i) one or more di(aminomethylene)phosphinic salts;
• and ii) a reaction medium, wherein the one of more di(aminomethylene)phosphinic salts are selected from a structure:
• wherein:
• R14 is one or more members selected from the group consisting of:
• H, CH3, C2H5, C3H7, C4H9, C5H11, C6H13, C7H15, C6H13N2, C5H14N2, C6H9N3, C6H7N, C8H17, and ethylpiperazine;
• R15 is one or more members selected from the group consisting of:
• H, CH3, C2H5, C3H7, C4H9, C5H11 and C6H13;
• R16 is one or more members selected from the group consisting of:
• H, CH3, C2H5, C3H7, C4H9, C5H11, C6H13, C7H15, C8H17, and ethylpiperazine;
• R17 is one or more members selected from the group consisting of:
• H, CH3, C2H5, C3H7, C4H9, C5H11 and C6H13;
• X2 is one or more members selected from the group consisting of:
• (1) one or more members selected from the group consisting of Na, Li and K,
• (2) NH4,
• (3) one or more organoamines selected from the group consisting of mono C1-6 amine, di C1-6 amine, tri C1-6 amine, mono ethanol amine, diethanol amine, triethanol amine, monoisopropanol amine, diisopropanol amine, triisopropanol amine, ethylene diamine diethylene triamine, triethylene tetraamine, and tetraethylene pentamine;
• Z2 is one or more members selected from the group consisting of:
• oxygen and sulfur;
• Z6 is one or more members selected from the group consisting of:
• oxygen and sulfur;
• wherein the reaction medium is one or more aprotic solvents;
• and
• wherein the non-aqueous liquid solution comprises less than 1% water.