Effects of Organic and Inorganic Fertilizers on Growth and Nutrient Uptake by Young Cacao (Theobroma cacao L.)

Table 5

Effect of soil amendments on soil pH and nutrients at two depths after two successive years of treatment application.

Treatment	PH	OC	TN	C/N	AP	K	Mg	Ca
		%		(mg kg^−1)		(cmolc kg^−1)
	Depth (0–15 cm)
T1	5.41^a	1.73^a	0.18^a	9.6^a	34.10^c	0.14^a	2.04^a	4.50 ^bc
T2	6.09^a	2.06^a	0.20^a	10.3^a	24.58^d	0.27^a	2.13^a	5.11 ^bc
T3	6.74^a	1.76^a	0.18^a	9.8^a	85.34^a	0.30^a	2.16^a	6.16^a
T4	6.38^a	1.72^a	0.18^a	9.6^a	52.76^b	0.18^a	2.04^a	4.21^c
T5	6.26^a	1.64^a	0.17^a	9.6^a	22.97^d	0.22^a	1.70^a	4.55 ^bc
T6	6.34^a	1.55^a	0.16^a	9.7^a	49.86^b	0.32^a	2.02^a	5.31 ^ab
	Depth (15–30 cm)
T1	5.52^c	1.16^a	0.11^a	10.5^a	20.11 ^cd	0.13^a	1.33^a	4.54^c
T2	6.26 ^abc	1.43^a	0.14^a	10.2^a	14.75^d	0.21^a	1.45^a	5.01^b
T3	7.01^a	1.36^a	0.13^a	10.5^a	64.29^a	0.19^a	1.74^a	5.89^a
T4	6.90^a	1.26^a	0.13^a	9.7^a	25.91^b	0.13^a	1.39^a	4.88 ^bc
T5	6.46 ^ab	1.25^a	0.12^a	10.4^a	16.63^d	0.16^a	1.25^a	4.00^d
T6	6.12 ^bc	1.16^a	0.12^a	9.7^a	22.82 ^bc	0.18^a	1.46^a	4.14^d
Crit min	5.60	3.5	0.09	-	20.00	0.25	1.33	7.50
SE Trmt	0.16	0.11	0.08	0.16	1.06	0.04	0.09	0.11
SE Dep	0.09	0.07	0.05	0.09	0.61	0.02	0.05	0.06
SED Trmt	0.23	0.16	0.12	0.22	1.50	0.05	0.13	0.15
SED Dep	0.13	0.09	0.07	0.13	0.87	0.03	0.07	0.09

Crit min = critical minimum of nutrients required by cacao [6]. SE = standard errors. SED = standard errors of differences. Trmt = treatment. Dep = depth. Within the same column, means followed by different superscript alphabet(s) are significantly different at p < 0.05 using Tukey's post hoc test.