Residual effects of corncob biochar on tropical degraded soil in central Uganda

Environmental Systems Research

Table 8 Residual effects of co-applied biochar with compost and/or NPK collard plant canopy, plant height, plant stem and the number of leaves at 60 DAT

Treatment	Plant canopy (cm)	Plant height (cm)	Plant stem girth (cm)	Number of leaves
CTRL	69.93b	61.40e	1.92b	12.88a
CM	72.09b	65.04cde	2.08b	13.00a
NPK	70.84b	63.10de	1.97b	13.59a
BC1	78.25ab	67.52bcde	2.08b	13.13a
BC2	76.68b	67.82bcde	2.12b	13.06a
BC1 + CM	78.85ab	69.11bcd	2.08b	13.31a
BC2 + CM	82.10ab	70.73abc	2.39b	13.43a
BC1 + NPK	81.19ab	73.48ab	2.43b	13.13a
BC2 + NPK	90.14a	77.22a	3.62a	14.03a
Significant^X	***	***	**	NS
SED^Y	3.90	2.23	0.29	0.72

Significant^X and SED^Y effects were obtained from one-way analysis of variance: *, **, ***Significant at P < 0.05, P < 0.01, and P < 0.001, respectively. See Table 2 for a description of the treatments; Means followed by the same letter in each column are not significantly different at p ≤ 0.05 using Tukey HSD