rate of N fertilizer applied

section n-n n-n

agronomic efficiency of applied N

amount of applied N

amount of N-applied

apparent recovery efficiency of applied N

applied N and p fertilizer rationally

Applied N-fertilizer amount

Applied Rate

Fertilizer applied rate

N applied

N applied for bud development

N applied levels

N-applied levels

Nitrogen applied rate

Phosphorus rate applied

(Br2BN3)(n) n=1~4

(CaN6)n (n=1～5) clusters

(Cl2BN3)n（n=1-4）