Table 4. Soil exchangeable K (mg kg⁻¹) as affected by main effects of P application and subplot effects of cropping system in 2011 and 2012.

Year	P rate (kg ha−1)	Soil exchangeable K of intercropped and weighted means of corresponding monocropped crops (mg kg−1)
		Maize + faba bean		Maize + soybean		Maize + chickpea		Maize + turnip		Average
		Mono	Inter	Mono	Inter	Mono	Inter	Mono	Inter	Mono	Inter	Mean
2011	0	95.9a	69.9c	98.6a	79.0b	95.7a	72.8bc	96.7a	74.7bc	96.7a	74.1b	85.4A
	40	91.6a	66.8d	95.3a	78.4bc	96.4a	80.3b	96.6a	74.3c	95.0a	75.0b	85.0A
	80	96.3a	71.4c	93.6a	80.3b	97.6a	80.7b	99.5a	75.4bc	96.8a	77.0b	86.9A
	Mean	94.6A	69.4D	95.8A	79.2B	96.6A	77.9BC	97.6A	74.8C	96.2A	75.4B	85.7
2012	0	83.9a	70.5b	75.6ab	76.5ab	80.3ab	82.7a	84.6a	84.6a	81.1a	78.6a	79.8A
	40	87.6ab	78.8bcd	74.3d	84.9abc	77.3cd	77.4cd	87.9a	84.9abc	81.0a	81.5a	81.3A
	80	85.1b	74.2bc	78.5b	80.6b	79.5b	64.9c	99.7a	76.4bc	79.9a	74.0b	76.9A
	Mean	85.5AB	74.5E	76.1DE	80.7BCD	79.0CDE	75.0DE	90.7A	82.0BC	80.6A	78.0B	79.3
ANOVA
	Year (Y)				<0.001						<0.001
	P rate (P)				0.722						0.801
	Cropping system (C)				<0.001						<0.001
	Y×P				0.204						0.334
	Y×C				<0.001						<0.001
	P×C				0.109						0.090
	Y×P×C				0.003						0.034

Values are means of three replicates. Values followed by the same lowercase letters are not significantly different among different cropping systems with the same P rate in one year at the 5% level by LSD (horizonal comparison); values followed by the same capital letters are not significantly different among different P rates (vertical comparison) or among different cropping systems (horizonal comparison) in one year at the 5% level by LSD. Values under ANOVA are the probabilities (P values) of the sources of variation.