This blog is very informative for Agriculture and botany students. It is about Horticulture Articles, Jobs, admission and organic farming.

How to make humic acid:

Humic acid is an organic matter found in the sediment, terrestrial soil, and natural water.

Methods of making humic acid:

Thermophilic composting

Vermicomposting

Fermentation

Thermophilic composting:

Compost generally undergoes mesophilic, thermophilic, and stable phases. Among the phases, the thermophilic phase has the peak temperature, from 45 c°up to 70 c°.

Thermophilic compost is a product that undergoes the process to achieve a sanitary and stable

compost with a controlled biological decomposition of biodegradable materials such as agricultural and kitchen waste, mainly under aerobic conditions, and allows the development of thermophilic temperatures biologically.

A good quality compost has moist, fine-textured, pathogen-free, and comprises high beneficial microbes, soluble mineral nutrients, phytohormones, humic substances, and low phytotoxic organic acids and heavy metals. Humic substances can be used as an indicator of the maturity of compost (Wei et al., 2007).

Humic acid substance can be make from red mud composting.

It can be make from co-composting of chicken manure and rice straw.

Add manganese dioxide (MnO2) to fast the process.

Bokashi: 

Bokashi is one example of organic matter fermentation. Bokashi is fermented organic matter (e.g., cooked and raw plant and animal-based materials)  made by fermenting with effective microorganisms, molasses, and water for about two weeks and sun-dried within twodays (to avoid secondary fermentation).

Alkaline Extraction:

 First, the water mixed sample and 1:1 ratio of potassium hydroxide (KOH) and potassium pyrophosphate (K4P2O7) were stirred at room temperature. Then, the liquid was separated from the solid to obtainthe humic acid extractant (Stevenson, 1994). Still, it was not easily extracted by farmers. Potassium pyrophosphate (K4P2O7) is a type of food additive, and thus it is nontoxic to use. However, KOH is very high in pH (base) and harm human if not handled carefully. Therefore, the use of KOH is only recommended in laboratories.