Diammonium Phosphate: Diammonium Phosphate (DAP) is what’s referred to as an “ammoniated” phosphate product because the use of ammonia during the production process provides a nitrogen, as well as a phosphate, content. DAP, at 46 percent phosphate and 18 percent nitrogen, can be applied by itself or easily mixed with nitrogen and/or potash fertilizers, often as part of a total N-P-K (nitrogen, phosphate, and potash) plant food mix. As a granular product, DAP can be applied directly to the soil using conventional spreading equipment.
Monoammonium Phosphate: Monoammonium Phosphate, or MAP, is also an “ammoniated” phosphate product. MAP, at 52 percent phosphate and 11 percent nitrogen, can be applied by itself or easily mixed with nitrogen and/or potash fertilizers, often as part of a total N-P-K (nitrogen, phosphate, and potash) plant food mix. MAP, which has a lower nitrogen content than Diammonium Phosphate (CF Industries’ primary granular phosphate product), is generally used on crops such as soybeans. As a granular product, MAP can be applied directly to the soil using conventional spreading equipment.