Improving Phosphorus Availability in an Acid Soil Using Organic Amendments Produced from Agroindustrial Wastes

Table 2

Selected chemical properties of chicken litter biochar and pineapple residue compost.

Property	Pineapple residue compost	Chicken litter biochar
pH	7.89	8.50
Electrical conductivity (dS m^−1)	6.90	15.50
Total carbon (%)	45.80	63.70
Total N (%)	2.30	2.80
Total P (%)	0.46	2.60
C/N ratio	19.91	22.75
C/P ratio	99.56	24.50
Total K (%)	2.67	3.90
Total Ca (%)	0.40	5.90
Total Mg (g kg^−1)	6365.0	15.20
Total Na (g kg^−1)	1143.0	19.50
Total Zn (mg kg^−1)	119.0	856.0
Total Cu (mg kg^−1)	47.20	167.0
Total Fe (mg kg^−1)	5062.0	2650.0
Total Al (mg kg^−1)	1.50	0.60