Low cost maize stover biochar as an alternative to inorganic fertilizer for improvement of soil chemical properties, growth and yield of tomatoes on degraded soil of Northern Uganda

Table 7 Correlation analysis among soil chemical, growth and yield parameters

Parameters	pH	EC	OM	OC	CN	N	P	K	Ca	Mg	HP	RW	SW	NFP	FWP	Yield
pH	1
EC	-0.89^b	1
OM	0.69^b	-0.52^a	1
OC	0.69^b	-0.52^a	1.00^b	1
CN	0.05	0.20	0.51	0.51	1
N	0.15	-0.33	-0.19	-0.19	-0.65^b	1
P	-0.23	0.55^a	0.11	0.11	0.74^b	-0.51	1
K	0.71^b	-0.42	0.78^b	0.78^b	0.55^a	-0.19	0.46	1
Ca	0.73^b	-0.67^b	0.43	0.43	-0.10	0.04	-0.34	0.44	1
Mg	0.76^b	-0.86^b	0.45	0.45	-0.18	0.22	-0.52^a	0.39	0.79^b	1
HP	0.11	0.12	0.23	0.23	0.36	-0.26	0.52^a	0.43	-0.22	-0.22	1
RW	-0.03	0.29	0.29	0.29	0.35	-0.47	0.41	0.27	-0.25	-0.31	0.77^b	1
SW	-0.19	0.44	0.15	0.15	0.59^a	-0.33	0.79^b	0.34	-0.46	-0.52^a	0.75^b	0.71^b	1
NFP	-0.11	0.34	0.20	0.20	0.60^a	-0.21	0.74^b	0.38	-0.42	-0.46	0.63^a	0.60^a	0.96^b	1
FWP	-0.16	0.46	0.24	0.24	0.63^a	-0.39	0.75^b	0.34	-0.37	-0.47	0.65^b	0.72^b	0.94^b	0.92^b	1
Yield	-0.16	0.46	0.24	0.24	0.63^a	-0.39	0.75^b	0.34	-0.37	-0.47	0.65^b	0.72^b	0.94^b	0.92^b	1.00^b	1

HP Plant height, RW Root weight, SW Shoot weight, NFP Number of fruits per plant, FWP Fruit weight per plant, Yield Fruit yield
^a Correlation is significant at the 0.05 level (2-tailed)
^b Correlation is significant at the 0.01 level (2-tailed)

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