Available phosphorus (neutral citric acid ammonium -soluble phosphorus, count P2O5) ω(C-P2O5)/% 46-48 low Water -soluble phosphorus (count P2O5 ) ω(W-P2O5)% 90low Total Nitrogen (N) 16—18low ω(N)/% Total Nutrient ω(N+P2O5+K2O)64low Water ω(H2O)/%2max Granularity (φ1—4mm)/% 90 low Average granule compressive strength / N30 low