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

Table 4

Soil chemical attributes at 20–40 cm depth layer, in plots treated with and without sewage sludge (SS). Means of four years of application^(*).

Treatment	OM	pH	CEC	H+Al	K	Ca	Mg
	g·dm^-³		mmolc dm^-3
+SS	18.02a	5.28a	55a	25a	1.16a	21a	7.6a
−SS (Control)	18.31a	4.87b	53a	32b	1.23a	14b	5.7b
	V%	P	B	Cu	Fe	Mn	Zn
		mg dm^-³
+SS	54a	6.81a	0.14a	0.72a	15.2a	6.5a	0.5a
−SS (Control)	40b	2.38b	0.16a	0.52a	15.7a	5.5a	0.3b

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