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About
Benefits of Humic Acid

Current scientific studies show that the fertility of soil is determined to a very large extent by the content of humic acids. Their high cation-exchange capacity (CEC), the oxygen content as well as the above average water holding capacity are the reasons for the high value of using humic acids for improving soil fertility and plant growth. The most important feature of humic acids lies in their ability to bind insoluble metal ions, oxides and hydroxides, and to release them slowly and continually to plants when required. Due to these properties, humic acids are known to produce three-types of effects: physical, chemical and biological.

Physical Benefits

Humic acids physically modify the structure of the soil.

● Improve the structure of soil: Prevent high water and nutrient losses in light, sandy soils. Simultaneously convert them into fruitful soils by way of Decomposition. In heavy and compact soils, aeration of soil and water retention are improved; cultivation measures are facilitated.
● Prevent soil cracking, surface water runoff and soil erosion by increasing the ability of colloids to combine.
● Help the soil to loosen and crumble and thus increase aeration of soil as well as soil workability.
● Increase water holding capacity of soil and thus help resist drought.
● Darken the color of the soil and thus help absorption of the sun energy.
benefits

Chemical Benefits
Uncharged surface of
sand particles cannot
hold nutrients.
Large amounts of
nutrients not held
in soil and lost to leaching.
Coating of humates provides charged surface to hold nutrients. More nutrients held in soil not lost to leaching.

Humic acids chemically change the fixation properties of the soil.

● Neutralize both acid and alkaline soils; regulate the PH-value of soils.
● Improve and optimize the uptake of nutrients and water by plants.
● Increase buffering properties of soil.

● Act as natural chelator for metal ions under alkaline conditions and promote their uptake by the roots.
● Rich in both organic and mineral substances essential to plant growth.
● Retain water soluble inorganic fertilizers in the root zones and reduce their leaching.
● Possess extremely high cation-exchange capacities.
● Promote the conversion of nutrient elements (N, P, K, +Fe, Zn and other trace elements) into forms available to plants.
● Enhance the uptake of nitrogen by plants.
● Reduce the reaction of phosphorus with Ca, Fe, Mg and Al and liberate it into a form that is available and beneficial to plants. The productivity of particularly mineral fertilizers is increased considerably.
● Liberate carbon dioxide from soil calcium carbonate and enable its use in photosynthesis.
● Help to eliminate chlorosis due to iron deficiency in plants.
● Reduce the availability of toxic substances in soils.

Biological Benefits

Humic acids biologically stimulate the plant and the activities of micro-organisms.

● Stimulate plant enzymes and increase their production.
● Act as an organic catalyst in many biological processes.
● Stimulate growth and proliferation of desirable micro-organisms in soil.
● Enhance plant’s natural resistance against disease and pest.
● Stimulate root growth, especially vertically and enable better uptake of nutrients.
● Increase root respiration and root formation.
● Promote the development of chlorophyll, sugars and amino acids in plants and aid in photosynthesis.
● Increase vitamin and mineral content of plants.
● Thicken the cell walls in fruits and prolong the storing and shelf time.
● Increase germination and viability of seeds.
● Stimulate plant growth (higher biomass production) by accelerating cell division, increasing the rate of development in root systems and increasing the yield of dry matter.
● Increase the quality of yields; improve their physical appearance and nutritional value.

Ecological Benefits of Humic Acids
The ecological benefits of humic acids are diverse and present profitable and effective solutions for environmental problems and the preservation of the environment.

First of all, soils with a high content of humic acids are a guarantee for low nitrate leaching and for optimum nutrient efficiency. A well-developed root system, which is achieved by a high content of humic acids, prevents that nitrate and pesticides mix in with ground water. Futhermore, a low content of nitrate is an indicator and a prerequisite for appropriate “organic agriculture”. It happens very often that growers use fertilizers more than plants can take up. This leads to nitrate concentration in soil, which is later to be found in ground water. A purification plant, which should sink contaminated water under a value of five milligrams NO3-N per liter in complicated flows, means very high material costs at the same time.
Important Instead of curing the symptoms (water contamination) only, the root Causes (nitrate leaching) should be fought against with.

Secondly, humic acids reduce the over-salination problem in the application of water-soluble mineral fertilizers. Humic acids are able to decrease high salt contents in soils and thus the resulting toxicities. Especially the NH4-toxicity of fertilizers containing ammonia is reduced, which is of great importance for young plants particularly. Generally, humic acids reduce root burning which comes about through excessive salt concentrations in soils after fertilization; in case of permanent high levels of salt in soils, these are reduced. Furthermore, when humic acids are mixed with liquid fertilizers, the undesirable smell is diminished.

Thirdly, humic acids are an effective means to fight against soil erosion. this is achieved both by increasing the ability of soil colloids to combine and by enhancing root system and plant development. Leonardite and humate-based products are certificated for organic agriculture by renown organizations and institutions of agriculture worldwide.
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