... of crop and soil, Basic Properties: Di Ammonium Phosphate (DAP), is nitrogen phosphorus nutrition composition of the ... easy decomposition, volatilize the ammonia into ammonium dihydrogen phosphate. A weak alkaline solution, pH8.0.DAP is ... of crop and soil, special apply to ammonium phosphate crops like to, or according to the application ... Date: within 15 days after confirmation. Diammonium phosphate/DAP