Disclosed herein are methods of inhibiting chemical self-heating in organic-containing materials by the addition of phosphate and or other buffering agents which control the pH of the organic-containing material and alter the organic nature of the material such that self-heating reaction is inhibited, and fertilizer produced by these methods. Also disclosed are methods for producing an improved, i.e., self-heating resistant, organically-enhanced inorganic fertilizer and methods for improving the management of soil pH and the interaction of fertilizers with the soil and associated agricultural crops.