Seasonal Dynamics of N, P, and K in an Organic and Inorganic Fertilized Willow Biomass System

Table 2

Initial soil characteristics (mean and standard error) before organic wastes and commercial fertilizer were applied to shrub willow biomass crops.

Depth	N	P	K	Mg	Ca
	g kg^−1	mg kg^−1
0–15	1.8 (0.1)	17.9 (3.8)	62.3 (21.9)	92.3 (2.9)	728.9 (29.2)
15–30	1.3 (0.2)	13.9 (3.3)	24.0 (7.8)	90.7 (15.0)	852.0 (138.3)
Depth	S	OM	pH	CEC	EC
	mg kg^−1	%		meq/100 g	mS/cm
0–15	22.2 (1.1)	9.1 (3.0)	5.4 (0.1)	14.1 (1.1)	3.9 (1.6)
15–30	26.0 (7.8)	4.4 (1.3)	5.7 (0.1)	12.4 (1.7)	3.6 (1.8)