. 2016 Aug 5;6:30350. doi: 10.1038/srep30350

Table 4. Input rates of chemical fertilizers (kg ha⁻¹) and manure (t ha⁻¹) in long-term fertilization experiments at six typical croplands in China.

Site	Fertilizer	CK		NPK		NPKM
Site	Fertilizer	Wheat	Maize	Wheat	Maize	Wheat	Maize
HH	N-P-K	0-0-0^a	NA	38-17-0	NA	38-17-0	NA
HH	Manure	0		0		15
GZL	N-P-K	0-0-0	NA	165-36-69	NA	50-36-69	NA
GZL	Manure	0		0		23
HS	N-P-K	0-0-0	0-0-0	45-26-0	45-0-0	NA	NA
HS	Manure	0	0	0	0
ZZ	N-P-K	0-0-0	0-0-0	165-36-68	188-41-78	50-36-68	188-41-78
ZZ	Manure	0	0	0	0	15^b	0
YL	N-P-K	0-0-0	0-0-0	165-58-68	188-25-78	165-58-68	188-25-78
YL	Manure	0	0	0	0	13	0
QY	N-P-K	0-0-0	0-0-0	90-16-30	210-37-70	27-16-30	63-37-70
QY	Manure	0	0	0	0	10~15^c	25~35

NA: no crop.

^aDenotes fertilization rates are zero for all three fertilizers;

^bIs calculated based on C/N (i.e. 25) and carbon content (i.e. 19.8%) in cow manure;

^cDenotes a range.

Table 4. Input rates of chemical fertilizers (kg ha−1) and manure (t ha−1) in long-term fertilization experiments at six typical croplands in China.