Nitrification inhibitors to improve fertilizer efficiency

An inhibited aqueous fertilizer composition comprising,

• a) one or more aqueous nitrogen sources, and
• b) a liquid nitrification inhibitor solution, wherein the liquid nitrification inhibitor solution comprises:
• i) a nitrification inhibiting reaction composition, and ii) a Non-aqueous Organic Solvent Delivery System (NOSDS), wherein the nitrification inhibiting reaction composition comprises (1) one or more biodegradable polymers and/or oligomers, and (2) a non-aqueous reaction medium,
• wherein the one or more biodegradable polymers and/or oligomers comprise a one or more dicyandiamide-formaldehyde reaction products,
• wherein the one or more dicyandiamide-formaldehyde reaction products are formed in the non-aqueous reaction medium,
• wherein the non-aqueous reaction medium comprises a non-aqueous polar, aprotic solvent (NAPAOL),
• wherein the reaction parameters are set to maintain a non aqueous state to prevent the degradation of the dicyandiamide's cyano-functionality,
• wherein the loss of cyano functionality negatively impact the one or more biodegradable polymers and/or oligomers’ nitrification inhibition,
• wherein the NOSDS comprises the (1) NAPAOL and optionally, (2) one or more non-aqueous members selected from the group consisting of a) one or more additional polar, aprotic solvents, b) one or more aprotic solvents, c) one or more protic solvent, and d) combinations thereof, wherein the NOSDS's properties are:
• a) environmentally safe,
• b) flashpoint above 145° F.,
• c) safe for contact with humans and animals,
• d) able to maintain the one or more dicyandiamide-formaldehyde reaction products at levels of 1-50% in down to at least 10° C., and
• e) able to provide solubility of the one or more dicyandiamide-formaldehyde reaction products in the one or more aqueous nitrogen sources,
• wherein the inhibited aqueous fertilizer composition is made by dissolving the liquid nitrification inhibitor solution-into the one or more aqueous nitrogen sources, and wherein said liquid nitrification inhibitor solution comprises 0.05-10% of the inhibited aqueous fertilizer composition.