Effects of Biochar, Lime, and Compost Applications on Soil Physicochemical Properties and Yield of Pomelo (Citrus grandis Osbeck) in Alluvial Soil of the Mekong Delta

Table 1

Physicochemical characteristics of the soil before the experiments.

Parameters	Unit	Depth (cm)
		0–20	20–40
pHH2O		4.95	5.00
EC	mS·cm^−1	0.65	0.72
Available phosphorus	mg·kg^−1	28.2	22.9
Total nitrogen	%	0.38	0.31
Soil organic matter	%	3.05	3.15
Exchangeable cations
K^+		0.48	0.64
Ca^2+	cmolc·kg^−1	3.77	3.82
Mg^2+		4.23	4.01
Bulk density	g cm^−3	1.13	1.10
Soil texture
Sand	%	0.60	1.50
Silt		44.8	48.5
Clay		54.6	51.0
Soil textural class		Silty clay	Silty clay