Humic acid-based agents are not fertilizers but rather growth stimulants or catalysts in transition of mineral substances to chelates which are best assimilable both by plants and soil biota.
Natural humic acid-based agents are capable of:
- improving properties of various soils;
- reducing moisture uptake by light soils;
- increasing moisture intake rate in heavy soils.
At the same time, such agents make dense soil loose and thus increase uptake of humus that has significant impact on soils improving their quality. Such agents easily react with indigenous microflora of cultivated soils and facilitate its propagation. Such effect is observed both immediately after use and during the next few years.
Humic acid-based agents increase the number of microorganisms involved in humus formation and promote micronutrient movement in soils. Nitrogen, phosphorus and potassium – these elements transform into easier assimilable forms. Furthermore, their assimilation can be improved further by combination with mineral and organic substances which enhance action of each other resulting in consumption of mineral fertilizers reduced by 40 to 60%.
Despite the fact that humic-acid based fertilizers easily interact with nitrogen- and potassium containing substances, they should not be used in combination with phosphorus-based fertilizers since they form poorly soluble compounds. It would be much better to fertilize soil with phosphorus in advance.