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

Table 5

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

Treatments	Input	Potassium uptake by crop (kg/ha)					PKB (kg/ha/yr)	AKB (kg/ha/yr)	NKB (kg/ha/yr)
	Fa	M1	W1	M2	W2	Total
Nitrogen levels (N)
N1	220	111.4 b	129.0 c	51.8 c	131.1 b	423.2 c	−101.6 a	55.7 c	−45.9 a
N2	220	127.0 a	155.0 b	61.6 b	152.2 a	495.7 b	−137.9 b	84.3 b	−53.6 a
N3	220	135.7 a	171.3 a	79.3 a	161.5 a	547.7 a	−163.9 c	110.5 a	−53.3 a
LSD 0.05		12.0	11.13	9.72	9.8	25.03	12.5	14.61	NS
Phosphorus levels (P)
P1	220	115.6 b	146.3 a	58.1 b	143.0 a	463.0 b	−121.5 a	73.6 a	47.9 a
P2	220	131.0 a	151.1 a	63.9 ab	148.4 a	494.5 a	−137.2 b	85.9 a	−51.3 a
P3	220	127.4 ab	157.8 a	70.7 a	153.3 a	509.2 a	−144.6 b	91.0 a	−53.5 a
LSD 0.05		12.0	NS	9.72	NS	25.03	12.5	NS	NS
Potassium levels (K)
K1	130	114.5 b	141.6 b	53.4 c	135.8 c	445.3 c	−157.7 c	109.1 a	−48.6 a
K2	220	128.7 a	150.6 b	64.2 b	147.8 b	491.3 b	−135.7 b	88.2 b	−47.4 a
K3	310	130.7 a	163.1 a	75.1 a	161.2 a	530.1 a	−110.0 a	53.2 c	−56.8 a
LSD 0.05		12.0	11.13	9.72	9.8	25.03	12.5	14.61	NS
F test prob (P > F)
N									NS
P			NS		NS			NS	NS
K									NS
NP		NS	NS		NS	NS	NS	NS	NS
NK		NS	NS	NS	NS	NS	NS	NS	NS
PK		NS	NS	NS	NS	NS	NS	NS	NS
NPK		NS	NS	NS	NS	NS	NS	NS	NS
CV (%)		17.6	13.4	23.7	12.1	9.4	17.0	23.0	21.6
GM		124.7	151.7	64.2	148.3	488.9	−134.5	83.5	−50.9

Fa = fertilizer applied in 2 years, M1 = maize crop K uptake in 1^st year, W1 = wheat crop K uptake in 1^st year, M2 = maize crop K uptake in 2^nd year, M1 = wheat crop K uptake in 2^nd year, PKB = partial potassium balance, AKB = apparent potassium loss or gain, NKB = net potassium loss or gain, and NS = nonsignificant ();  = significant at 0.1%;  = significant at 1%; and  = significant at 5%, GM = Grand Mean.