Soil Quality and Pomelo Productivity as Affected by Chicken Manure and Cow Dung

Table 1

Initial physicochemical properties of the experimental soils.

Parameters	Unit	CT I		CT II		CT III
		0–20 cm	20–50 cm	0–20 cm	20–50 cm	0–20 cm	20–50 cm
pHH2O		5.19	5.07	4.34	4.83	4.68	5.01
EC	mS cm^−1	0.77	0.70	0.79	0.65	0.71	0.62
Available phosphorus	mg kg^−1	18.9	22.5	25.8	19.6	32.1	16.5
Total nitrogen	g kg^−1	0.91	1.32	1.61	1.05	1.52	1.96
Soil organic matter	%	2.87	2.83	3.56	3.35	3.37	3.45
Exchangeable cations
Na^+	meq 100g^−1	0.26	0.31	0.06	0.13	0.06	0.10
K^+		0.24	0.12	0.40	0.22	0.20	0.16
Ca^2+		5.73	6.52	5.80	6.39	6.90	6.83
Mg^2+		1.94	2.22	2.91	3.16	2.79	2.66
CEC	meq 100g^−1	19.9	19.3	20.6	21.0	21.5	20.4
Bulk density	g cm^−3	1.25	1.27	1.22	1.20	1.18	1.11
Soil texture
Sand	%	1.00	1.50	0.70	1.80	1.90	0.40
Silt		46.5	40.2	48.6	35.1	44.9	50.5
Clay		52.5	58.3	50.7	63.1	53.2	49.1
Soil textural class		Silty clay	Silty clay	Silty clay	Clay	Silty clay	Silty clay