Nutrient Availability and Changes on Chemical Attributes of a Paleudult Soil Amended with Liquid Sewage Sludge and Cropped with Surinam Grass

Table 1

Soil chemical attributes before sewage sludge application.

Soil depth	OM	pH	CEC	H+Al	K	Ca	Mg
	g dm^-3		mmolc dm^-3
0–20 cm	26	5.3	64	22	4.4	27	11.0
20–40 cm	17	4.8	52	23	2.6	13	6.7
	V	P	B	Cu	Fe	Mn	Zn
	%	mg dm^-3
0–20 cm	66	3	0.17	2.6	27.0	23	0.7
20–40 cm	42	2	0.18	0.5	16.3	5	0.2

OM: organic matter, pH (CaCl₂), CEC: cation exchange capacity, H+Al: potential acidity, V%: base saturation, K, Ca, Mg, P in resin extract, B in hot water extract, and Cu, Fe, Mn, and Zn in DTPA extract.