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

Table 4

Nutrient accumulation in potato leaves and tubers mean squares as influenced by phosphorus, potassium application rate, and their interaction.

Source of variation	d.f	Phosphorus content (ppm)		Potassium content (cmol kg^−1)
		Leaf	Tuber	Leaf	Tuber
Block	2	0.0013	0.0002^Ns	0.071^Ns	0.112
P	5	0.1257	0.1285	0.047^Ns	0.202
K	3	0.0001^Ns	0.0009	12.097	18.272
P × K	15	0.0003^Ns	0.0004^Ns	0.041^Ns	0.013^Ns
Error	46	0.0003	0.0002	0.029	0.035

where ,  = indicate a significant difference at 1% and 5% level of significance, respectively; Ns = nonsignificance at 5% level of significance; d.f = degree of freedom; P = phosphorus (P₂O₅); and K = potassium (K₂O).