Improving Lowland Rice (O. sativa L. cv. MR219) Plant Growth Variables, Nutrients Uptake, and Nutrients Recovery Using Crude Humic Substances

Table 2

Selected chemical properties of rice straw compost and sawdust ash.

Property	Rice straw compost	Sawdust ash
pH	7.58	11.03
CEC (Cmol (+) kg^−1)	93.60	nd
Molarity (w : v = 1 : 100) (M)	nd	0.002
(%)
Organic matter	74.00	nd
Total organic carbon	42.92	nd
Humic acids	10.97	nd
Crude humins	87.93	nd
Total N	1.85	nd
Total P	0.75	0.47
Total K	2.42	0.27
Total Ca	1.20	7.63
Total Mg	0.75	1.09
Total Na	0.24	0.04
Total Fe	0.25	3.57
Total Zn (mg kg^−1)	164	683
Total Mn (mg kg^−1)	223	1833
Total Cu (mg kg^−1)	71	213