Effects of Stubble Management on Soil Fertility and Crop Yield of Rainfed Area in Western Loess Plateau, China

Table 6

Potassium balance under different treatments over 5 years (kg K ha⁻¹).

Rotation	Item	T	NT	TS	NTS	Significant
P/W	Input	4.93	4.65	40.15	49.27	—
	Output	41.88	33.01	52.48	60.52	**
	Balance	−36.95	−28.36	−12.32	−11.25	**
W/P	Input	0.68	0.68	14.68	19.03	—
	Output	27.82	31.38	35.99	39.87	**
	Balance	−27.14	−30.70	−21.31	−20.84	**

Significant level (^∗𝑃<0.05; ^∗∗𝑃<0.01; ^∗∗∗𝑃<0.001).