Biosolids Application on Banana Production: Soil Chemical Properties and Plant Nutrition

Table 3

Chemical analysis of biosolids used in the experiment (average results).

Variable	Unity	Value
Phosphorus (P)	g kg^−1*	15.4
Potassium (K)	g kg^−1*	0.9
Sodium (Na)	g kg^−1*	0.6
Arsenium (As)	mg kg^−1*	<0.1
Cadmium (Cd)	mg kg^−1*	10.3
Lead (Pb)	mg kg^−1*	83.6
Copper (Cu)	mg kg^−1*	139.6
Chromium (Cr)	mg kg^−1*	43.8
Mercury (Hg)	mg kg^−1*	<0.1
Molybdenum (Mo)	mg kg^−1*	<0.1
Nickel (Ni)	mg kg^−1*	22.2
Selenium (Se)	mg kg^−1*	<0.1
Zinc (Zn)	mg kg^−1*	573.4
Boron (B)	mg kg^−1*	22.9
Carbon (organic)	g kg^−1*	222.7
pH		9.9
Humidity	%	71.2
Volatile solids	%*	52.5
Total N (Kjeldahl)	g kg^−1*	32.0
NH4-N	mg kg^−1**	558
NO3-N + NO2-N-	mg kg^−1**	13.6
Sulfur	g kg^−1*	7.7
Manganese	mg kg^−1*	778
Iron	g kg^−1*	106
Magnesium	g kg^−1*	5.9
Aluminum	g kg^−1*	7.0
Calcium	g kg^−1*	174
Available N***	g kg^−1**	2.96

*Total concentrations in a dry matter basis; **original residue element concentrations; ***available N calculated according to Bovi et al. [5].