Item specification test result appearance white crystal powder white crystal powder total nutrient 73.0% min 73% phosphorus (as p2o5) 61% min 61% nitrogen(as n) 12% min 12% ph 4.2~4.7 4.2~4.7 moisture 0.30% max 0.21% water insoluble matter 0.20% max 0.15% sodium(as nacl) 0.5% maxmore...