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

Table 4

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

Treatments	Input	Phosphorus uptake by crop (kg/ha)					PPB (kg/ha/yr)	APB (kg/ha/yr)	NPB (kg/ha/yr)
	Fa	M1	W1	M2	W2	Total
Nitrogen levels (N)
N1	220	105.9 b	54.5 c	72.1 b	50.9 c	283.4 c	−31.7 a	−148.5 c	−180.2 a
N2	220	114.9 a	69.3 b	82.2 b	59.6 b	326.1 b	−53.0 b	−127.4 b	180.4 a
N3	220	121.9 a	75.5 a	113.2 a	65.0 a	375.3 a	−77.6 c	−104.2 a	−181.8 a
LSD 0.05		7.91	4.51	11.21	3.642	16.37	8.2	10.20	NS
Phosphorus levels (P)
P1	130	108.9 b	62.3 b	80.4 b	54.9 b	306.5 c	−88.2 c	−97.9 a	−186.2 b
P2	220	115.0 ab	66.6 ab	89.6 ab	58.6 a	329.5 b	−54.8 b	−122.8 b	−177.6 a
P3	310	118.7 a	70.4 a	97.5 a	62.1 a	348.7 a	−19.3 a	−159.2 c	−178.6 a
LSD 0.05		7.91	4.51	11.21	3.64	16.37	8.2	10.20	6.75
Potassium levels (K)
K1	220	108.5 b	63.5 b	77.2 b	55.3 b	304.5 c	−42.3 a	−136.8 b	−179.0 a
K2	220	116.3 ab	67.1 ab	86.1 b	58.4 ab	327.9 b	−53.9 b	−129.1 b	−183.0 a
K3	220	117.9 a	68.7 a	104.3 a	61.7 a	352.3 a	−66.1 c	−114.2 a	−180.3 a
LSD 0.05		7.91	NS	11.21	3.64	16.37	8.2	10.20	NS
F test prob (P > F)
N									NS
P
K			NS						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
NPK		NS	NS	NS	NS	NS	NS	NS	NS
CV (%)		12.7	12.4	23.0	11.4	9.1	27.7	14.7	6.8
GM		114.2	66.42	89.2	58.50	328.2	−54.1	−126.7	−180.8

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