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There is no better way to enhance the economics of farming, than to build soil humus and enhance the natural processes, such as microbial activity, which can be sustained over a long period of life. Potassium humates derived from lignite brown coal are alkaline, rich in carboxylic and phenolic groups, aromatic in nature and provide favourable conditions for biological activity, chemical reactions and physical improvement of soil. Accumulation level of natural humic acids like potassium humate has shown to reduce the need for commercial fertilizers because it improves fertilizer efficiency. The utilization of humic acid has been found to reduce the leaching of fertilizers and pesticides into aquifer and surface waters. By using humic acids, growers will gradually reduce application macro and micronutrients fertilizers application with addition to the improvement of overall crop yields and quality.
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Singh et al. (2013) studied this question.
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