Effect of Phosphorus and Potassium Fertilizers Application on Soil Chemical Characteristics and Their Accumulation in Potato Plant Tissues

Table 3

Main effects of phosphorus and potassium fertilizers on available phosphorus, exchangeable potassium, and CEC status of the soil after harvest.

Treatments	Available phosphorus (ppm)	Exchangeable potassium (cmol kg^−1)	CEC (cmol kg^−1)
P2O5 (kg ha^−1)
0	6.52^c	0.23^a	20.71^a
46	6.60^c	0.21^b	20.45^a
92	7.43^c	0.21^b	19.18^c
138	10.92^b	0.21^b	19.58^bc
184	15.85^a	0.20^b	19.99^ab
230	16.77^a	0.20^b	19.01^c
F test
LSD (5%)	1.25	0.02	0.7784
K2O (kg ha^−1)
0	11.13	0.06^d	17.87^c
100	10.66	0.15^c	17.88^c
200	10.21	0.26^b	21.05^b
300	10.73	0.36^a	22.48^a
F test	Ns
LSD (5%)	1.02	0.01	0.64
CV (%)	14.29	9.39	4.78

Means of the same main effect followed by the same letter or with no superscript letter within a column are not significantly different at the 5% level of significance;  = significant at probability level; Ns = nonsignificant at probability level; CEC = cation exchange capacity; LSD = least significant difference; and CV = coefficient of variation.