Abstract:
Five experiments were aimed at the product improvement and quality control of soil conditioners trade mark Maneejan Industry Co. Ltd. In Experiment 1, the analysis of the qualification of humic compounds extracted from ground leonardite showed to contain potassium humin, potassium humate, potassium fulvet, sodium humin, sodium humate and sodium fulvet. The highest total N-P-K contents were obtained from sodium humate; sodium humate and potassium fulvet; and sodium humate respectively. Experiment 2, a plot experiment was conducted to study the effect of humic compounds on growth and yield of rice KDML 105. The data revealed that plants sprayed with potassium humate and sodium humate caused significant increase in plant height, number of tillers, panicle length, and grains per panicle as compound with a standard treatment. The Experiment 3, analysis of raw materials used in soil improvement indicated that the materials used were relatively low in fertilizer nutrient contents. The results of Experiment 4, showed that there were no statistically significant differences in the quality of formulation specification of raw materials used to manufacture of soil conditioners of the 3 repeatable manufacturing. The results of Experiment 5, the impacts of soil conditioners and humic compound from leonardite on soil properties were compound with no significantly different found. However, the differences were statistically significant for growth and yield parameters of rice as affected by the application of soil conditioners and humic compound from leonardite.