TABLE 1.

Nutrient contents of incorporated wheat straw and soil nutrient contents in different soil layers before planting (g⋅kg^–1).

Nutrient	Soil layer (cm)			Crop straw (g⋅kg–1)
	0–20	20–40	40–60
Organic C (g⋅kg–1)	11.97	12.03	8.25	/
Total N (g⋅kg–1)	1.31	0.78	0.56	6.64
Total P (g⋅kg–1)	0.729	0.54	0.39	0.47
Total K (g⋅kg–1)	14.9	20.14	25.48	20.62