Research Article

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

Table 6

pH and major cation contents (mg kg−1) of crude fulvic acids from different composts.

PropertyRice strawRice huskSawdustEFB

pH1.59a (±0.01)1.53b (±0.01)1.54b (±0.00)1.55b (±0.01)
Total K (%)7.45a (±0.08)4.58c (±0.22)3.82d (±0.13)5.56b (±0.18)
Total Ca (%) ) ) ) )
Total Mg (%) ) ) ( ) )
Total Na (%)0.146a (±0.0006)0.091c (±0.0003)0.074d (±0.0006)0.095b (±0.0006)

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