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

Table 2

Mean squares of soil fertility status after harvest as influenced by phosphorus and potassium applications.

Source of variation	d.f	Available phosphorus (ppm)	Exchangeable potassium (cmol kg^−1)	CEC (cmol kg^−1)
Block	2	5.19^Ns	0.0005^Ns	2.03^Ns
P	5	259.95	0.0013	5.62
K	3	2.58^Ns	0.3228	96.86
P × K	15	3.54^Ns	0.0003^Ns	1.18^Ns
Error	46	2.33	0.0004	0.90

where  = indicate significant difference at 1%; Ns = nonsignificant at 5% level of significance; d.f = degree of freedom; CEC = cation exchange capacity; P = phosphorus (P₂O5); K = potassium (K₂O).