Table 4. The fractional distribution of inorganic P fractions as influenced by cropping systems.

Cropping Systems	Inorganic P fractions					Fractional distribution
	LB-P	Al-P	Fe-P	RS-P	Ca-P	LB-P	Al-P	Fe-P	RS-P	Ca-P
	mg kg-1					%
Vegetable-based	28.41	167.65	218.03	164.08	113.77	1.23	7.27	9.46	7.12	4.94
Fruit-based	18.47	111.67	172.05	149.29	91.22	0.83	4.99	7.69	6.67	4.08
Rice-based	12.17	45.08	163.19	115.75	97.43	0.58	2.17	7.84	5.56	4.68
Maize-based	16.20	73.94	141.33	126.83	79.89	0.75	3.42	6.54	5.87	3.70

Min., Minimum; Max., Maximum; LB-P, Loosely bound P; Al-P, Aluminum bound P; Fe-P, Iron bound P; RS-P, Reductant soluble P; Ca-P, Calcium bound P