Soil Nutrient Balance and Soil Fertility Status under the Influence of Fertilization in Maize-Wheat Cropping System in Nepal

Table 3

Partial balance, apparent gain or loss, and net gain or loss of nitrogen (kg/ha) per year as affected by fertilization in the maize-wheat experiment, Khumaltar, Lalitpur, 2019/20–2020/21.

Treatments	Input	Nitrogen uptake by crop (kg/ha)					PNB (kg/ha/yr)	ANB (kg/ha/yr)	NNB (kg/ha/yr)
	Fa	M1	W1	M2	W2	Total
Nitrogen levels (N)
N1	500	189.0 c	109.3 c	103.6 b	119.3 c	521.3 c	−10.6 c	−242 a	−252 a
N2	610	217.1 b	128.9 b	117.2 b	137.4 b	600.7 b	4.6 b	−245 a	−240 a
N3	720	241.5 a	139.0 a	159.2 a	147.8 a	687.4 a	16.3 a	−228 a	−211 a
LSD 0.05		11.09	7.97	14.08	8.30	22.33	11.2	NS	NS
Phosphorus levels (P)
P1	610	206.3 b	122.4 a	116.9 b	131.0 a	576.6 c	16.7 a	−244 a	−228 a
P2	610	217.3 ab	123.9 a	126.6 ab	134.9 a	602.7 b	3.6 b	−242 a	−239 a
P3	610	224.0 a	130.9 a	136.6 a	138.6 a	630.1 a	−10.1 c	−227 a	−237 a
LSD 0.05		11.09	NS	14.08	NS	22.33	11.2	NS	NS
Potassium levels (K)
K1	610	199.3 b	116.9 c	110.2 c	125.3 b	551.7 c	29.2 a	−244 a	−214 a
K2	610	221.4 a	125.4 b	126.2 b	135.7 a	608.7 b	0.6 b	−233 a	−232 a
K3	610	226.9 a	134.9 a	143.6 a	143.6 a	649.0 a	−19.5 c	−237 a	−257 a
LSD 0.05		11.09	7.97	14.08	8.30	22.33	11.2	NS	NS
F test prob (P > F)
N								NS	NS
P			NS		NS			NS	NS
K								NS	NS
NP		NS	NS		NS			NS	NS
NK		NS	NS	NS	NS	NS	NS	NS
PK		NS	NS	NS	NS	NS	NS	NS
NPK			NS	NS	NS			NS	NS
CV (%)		9.4	11.6	20.3	11.3	6.8	25.2	20.2	19.9
GM		215.9	125.7	126.7	134.8	603.1	3.4	−238	−235

Fa = fertilizer applied in 2 years, M1 = maize crop N uptake in 1^st year, W1 = wheat crop N uptake in 1^st year, M2 = maize crop N uptake in 2^nd year, M1 = wheat crop N uptake in 2^nd year, PNB = partial nitrogen balance, ANB = apparent nitrogen loss or gain, NNB = net nitrogen loss or gain, NS = nonsignificant ();  = significant at 0.1%;  = significant at 1%; and  = significant at 5%, GM = grand mean.