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

Table 3

Soil chemical attributes at the 0–20 cm depth layer of soil samples from plots with and without sewage sludge (SS) addition. Means over four years of application ^(*).

Treatment	OM	pH	CEC	H+Al	K	Ca	Mg
	g·dm^-³				mmolc dm^-3
+SS	26.7a	5.77a	69a	19a	1.93a	39a	9.17a
−SS (Control)	27.1a	5.39b	62b	23b	2.44a	27b	8.92b
	V%	P	B	Cu	Fe	Mn	Zn
		mg dm^-³
+SS	71a	17.9a	0.14a	2.77a	23.3a	17.4a	1.3a
−SS (Control)	62b	5.44b	0.16a	2.41a	26.6a	20.2a	0.9b

^(*) Means followed by the same letters in the column do not differ by F test (𝑃<.05).