Effects of Biochar and Compost Application on Soil Properties and on the Growth and Yield of Hot Pepper (Capsicum annuum L.)

Table 5

Effects of organic amendments on soil available K, Ca, Mg, and CEC.

Years	Treatment	Avail. K (mg/kg)	Ca (meq/kg)	Mg (meq/kg)	CEC (meq/kg)
2020	Control	0.51 ± 0.04^i	12.43 ± 0.68^h	1.55 ± 0.09^i	12.42 ± 0.63^f
	5 CPC	0.62 ± 0.04^h	14.72 ± 0.14^fg	2.51 ± 0.02^h	13.25 ± 0.29^e
	7.5 CPC	0.75 ± 0.03^f	15.46 ± 0.16^f	3.85 ± 0.62^g	13.75 ± 0.13^e
	10 CPC	0.90 ± 0.05^d	17.65 ± 0.03^d	4.53 ± 0.06^de	15.82 ± 0.13^d
	2 CPB	0.69 ± 0.04^g	15.09 ± 0.09^fg	3.87 ± 0.09^g	13.71 ± 0.83^e
	3 CPB	0.81 ± 0.02^e	16.57 ± 0.21^e	4.08 ± 0.08^ef	14.87 ± 0.10^d
	4 CPB	0.96 ± 0.03^c	18.41 ± 0.21^c	4.75 ± 0.02^d	17.33 ± 0.09^c
	3.5 CPC_CPB	0.72 ± 0.01^g	15.85 ± 0.03^f	4.24 ± 0.07^e	15.73 ± 0.66^d
	5.25 CPC_CPB	0.84 ± 0.02^e	17.17 ± 0.05^de	4.33 ± 0.12^e	16.84 ± 0.12^c
	7 CPC_CPB	0.91 ± 0.05^d	18.04 ± 0.13^cd	4.60 ± 0.03^de	16.79 ± 0.39^c
2021	Control	0.49 ± 0.06^i	10.23 ± 0.11^g	1.53 ± 0.11^i	12.33 ± 0.91^f
	5 CPC	0.64 ± 0.02^h	16.40 ± 0.79^e	2.54 ± 0.11^h	13.56 ± 0.14^e
	7.5 CPC	0.77 ± 0.01^f	17.22 ± 0.19^de	4.06 ± 0.11^f	15.41 ± 0.08^d
	10 CPC	1.07 ± 0.03^b	18.76 ± 0.18^c	4.96 ± 0.03^c	18.18 ± 0.30^b
	2 CPB	0.71 ± 0.02^g	17.22 ± 0.11^de	4.11 ± 0.16^ef	15.44 ± 0.24^d
	3 CPB	0.82 ± 0.01^e	17.86 ± 0.11^d	4.28 ± 0.12^e	15.93 ± 0.26^d
	4 CPB	1.12 ± 0.03^a	20.91 ± 0.51^a	5.35 ± 0.11^a	19.40 ± 1.03^a
	3.5 CPC_CPB	0.75 ± 0.03^f	17.70 ± 0.26^d	4.27 ± 0.09^e	16.74 ± 0.11^c
	5.25 CPC_CPB	0.85 ± 0.01^e	17.93 ± 0.10^d	4.62 ± 0.10^d	16.98 ± 0.12^c
	7 CPC_CPB	1.08 ± 0.03^b	19.59 ± 0.41^b	5.15 ± 0.07^b	19.09 ± 0.80^a
	Year (Y)
	Treatment (T)
	Y × T

CPC = coffee pulp compost, CPB = coffee pulp biochar, and CPC_CPB = coffee pulp compost biochar. Avail K: available potassium, Ca: calcium, Mg: magnesium, and CEC: cation exchange capacity. Values followed by similar letters under the same column are not significantly different, . . .