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

Table 4

Effects of organic amendments on soil pH, BD, OC, TN, and available P.

Years	Treatment	pH	BD (g cm^−3)	OC (%)	TN (%)	Avail. P (mg/kg)
2020	Control	6.25 ± 0.03^i	1.49 ± 0.10^a	1.36 ± 0.02^i	0.45 ± 0.07^i	0.86 ± 0.03^g
	5CPC	6.35 ± 0.03^h	1.42 ± 0.02^b	3.43 ± 0.13^g	0.67 ± 0.12^i	1.24 ± 0.03^e
	7.5 CPC	6.41 ± 0.06^fg	1.32 ± 0.01^c	4.31 ± 0.06^ef	0.87 ± 0.04^g	1.34 ± 0.04^d
	10 CPC	6.63 ± 0.02^e	1.23 ± 0.02^cd	5.60 ± 0.15^d	1.02 ± 0.07^e	1.61 ± 0.06^b
	2 CPB	6.44 ± 0.03^fg	1.30 ± 0.01^c	4.63 ± 0.22^de	0.77 ± 0.09^h	1.36 ± 0.04^d
	3 CPB	6.55 ± 0.03^f	1.19 ± 0.02^d	5.13 ± 0.23^d	1.00 ± 0.11^e	1.58 ± 0.07^bc
	4 CPB	6.73 ± 0.02^d	1.13 ± 0.01^d	6.40 ± 0.07^b	1.20 ± 0.02^b	1.74 ± 0.03^ab
	3.5 CPC_CPB	6.41 ± 0.02^fg	1.28 ± 0.05^c	3.76 ± 0.34^g	0.74 ± 0.08^h	1.12 ± 0.06^f
	5.25 CPC_CPB	6.53 ± 0.05^f	1.21 ± 0.01^cd	4.89 ± 0.08^de	0.94 ± 0.08^f	1.34 ± 0.10^d
	7 CPC_CPB	6.69 ± 0.02^d	1.16 ± 0.01^d	5.96 ± 0.08^c	1.16 ± 0.09^c	1.70 ± 0.08^b
2021	Control	6.18 ± 0.07^i	1.51 ± 0.01^a	1.25 ± 0.02^i	0.36 ± 0.11^j	0.82 ± 0.03^g
	5 CPC	6.45 ± 0.02^fg	1.31 ± 0.04^c	3.53 ± 0.15^gh	0.74 ± 0.09^h	1.32 ± 0.07^d
	7.5 CPC	6.56 ± 0.07^f	1.22 ± 0.06^cd	4.44 ± 0.07^ef	1.09 ± 0.11^d	1.41 ± 0.04^c
	10 CPC	6.79 ± 0.03^c	1.11 ± 0.02^e	5.93 ± 0.16^c	1.24 ± 0.10^b	1.79 ± 0.02^ab
	2 CPB	6.52 ± 0.02^f	1.22 ± 0.03^cd	4.81 ± 0.27^de	0.86 ± 0.13^g	1.47 ± 0.04^c
	3 CPB	6.54 ± 0.02^d	1.13 ± 0.02^e	5.34 ± 0.11^d	1.06 ± 0.11^d	1.61 ± 0.04^b
	4 CPB	6.89 ± 0.04^a	1.04 ± 0.03^f	6.80 ± 0.07^a	1.38 ± 0.11^a	2.06 ± 0.10^a
	3.5 CPC_CPB	6.48 ± 0.05^fg	1.25 ± 0.01^cd	3.86 ± 0.32^g	0.86 ± 0.09^g	1.22 ± 0.05^e
	5.25 CPC_CPB	6.52 ± 0.07^de	1.19 ± 0.01^d	4.99 ± 0.11^de	1.07 ± 0.10^d	1.46 ± 0.13^c
	7 CPC_CPB	6.84 ± 0.01^b	1.12 ± 0.04^e	6.50 ± 0.29^b	1.35 ± 0.08^a	1.83 ± 0.07^b
	Year (Y)
	Treatment (T)
	Y × T			NS	NS

CPC = coffee pulp compost, CPB = coffee pulp biochar, and CPC_CPB = coffee pulp compost and coffee pulp biochar. BD: bulk density, OC: organic carbon, TN: total nitrogen, and Avail. P: available phosphorus. Values followed by similar letters under the same column are not significantly different, . . .