Humic acids are produced from the complete decomposition of organic remnants and contain long chains of molecules which beside their heavy weigh, have dark brown color. There a variety of these kind of acids which are soluble in alkali and naturally, they exist in life cycle of soils, oceans and rivers.

When plants and animals die, their remnants are available for other creatures in soil. Bacteria, fungi, earthworms and even insects use these substances as food. After a very long time, these substances suffer transformations and what remains is a black compound called Humus. This process is also called humufication. Humus refers to very complicated compounds which are resistant against decomposition. These compounds include Humic acid, Fulvic acid and Humin. Humic acids and Fulvic are also important in improving the structure of soil and transferring food elements between soil and plants.

Humic acids come from a variety of sources. The richest ones have been produced from old sources which are the result of decomposing animal and plants remnants in humic areas. After a while, these massive areas containing decomposing materials are covered by sand and rock which make them richer sources. These sediments are mined near the Earth's surface and are usually known as Lignite and Leonardinate. Today, most of Humic acid products come from these sources.

Unfortunately, many activities performed by human have caused the destruction and pollution of soils. In addition, they have reduced the organic matters of soil which is a dangerous issue for both environment and human health. Erosion is among the biggest results of soil degradation which leads in destruction of surface soils. Using mineral fertilizers will reduce the humus levels in soil. To rebuild the soil, organic matters should be replaced and the decomposed humus should be supplied from external sources because the natural process takes years to occur. Without enough humus, biological activities of both plants and soil will considerably reduce. Healthy soils contain 2 to 6 percent of organic matters. However, most agricultural activities take place in ones with low level of organic matters.

Historically, farmers have used Humic acids in order to come up with healthier and better products. Today, consuming these compounds have become permanent due to reasons mentioned before some other advantages of using these compounds are:

- Increases the absorption of food elements.

- Increases the capacity of water holding.

- Through increasing the absorption of Iron, eliminates the symptoms of chlorosis caused by deficiency of this element

- Improves the structure of soil

- Stimulants the microbial activities.

- Adjusts the pH of soil.

- Improves the plant's health and helps it to resist against pathogens and environmental tensions.

- Stimulants the growth of roots which results in getting bigger products.

- Increases the germination