Research Article

Compost and Crude Humic Substances Produced from Selected Wastes and Their Effects on Zea mays L. Nutrient Uptake and Growth

Table 7

Chemical properties of crude humins from different composts.

PropertyRice strawRice huskSawdustEFB

pHwater9.42d (±0.01)9.63c (±0.02)9.80b (±0.01)9.86a(±0.01)
pHKCl9.22d (±0.00)9.40c (±0.01)9.45b (±0.01)9.81a (±0.01)
OM (%)73.33c (±1.20)75.00c (±0.58)90.33a (±0.88)84.67b (±1.33)
TOC (%)42.53c (±0.70)43.50c (±0.33)52.39a (±0.51)49.11b (±0.77)
CEC (cmol kg−1)62.00a (±3.86)46.07b (±1.10)52.60ab (±1.90)46.07b (±1.27)
Total N (%)1.39a (±0.05)0.84bc (±0.03)0.72c (±0.04)0.95b (±0.02)
Total P (%)0.62a (±0.02)0.34b (±0.00)0.23c (±0.01)0.30b (±0.02)

Different alphabets within a row indicate significant difference between means using Tukey’s test at .
( ) values in parenthesis represent standard error of the mean.