Exploring Humic Acid: Structure and Classification Explained – Part 2
The dry humic powder raw material reacts with nitric acid to obtain nitrohumic acid. It is insoluble in water, but easily soluble in dilute alkaline solutions (such as sodium hydroxide solutions) to form dark solutions. It has a large specific surface area and pore structure, and has a strong adsorption capacity for heavy metal ions, organic pollutants, etc. Nitrohumic acid can improve soil structure, increase soil organic matter content, and improve soil water and fertilizer retention capacity. Its acidic functional groups can neutralize alkaline soils and adjust pH values.
A product containing a certain amount of humic acid, nitrate nitrogen and a specified amount of calcium made by the reaction of nitrohumic acid with calcium oxide or calcium hydroxide.
Humic acid fertilizer is a kind of organic fertilizer commonly used in agricultural production. It refers to the use of peat, leonardite, and weathered coal as raw materials, and adopts different production methods to produce products containing a large amount of humic acid and nitrogen, phosphorus, potassium and certain trace elements required for crop growth and development. Humic acid fertilizer interacts with calcium ions in the soil to form a gel of flocculent precipitation, which binds the soil adhesive and makes the soil particles become small reservoirs and fertilizer reservoirs for water and fertilizer retention, increasing soil gaps and improving the soil's ability to retain water and fertilizer.
Fertilizer containing humic acid and one of the three nutrients of nitrogen, phosphorus, and potassium. This type of fertilizer can provide both organic matter and specific inorganic nutrients, and has dual functions.
A type of urea product made by adding water-soluble humic acid to the urea production process through the reaction technology of urea and dry humic powder. Humic acid urea has both the agrochemical properties of active humic acid and the advantages of urea. The humic acid urea complex formed has better agrochemical properties. Humic acid urea can save the use of nitrogen fertilizer and increase the organic matter content of the soil.
Fertilizer containing humic acid and at least two of the three nutrients: nitrogen, phosphorus, and potassium.
Fertilizers contain humic acid and two of the three nutrients: nitrogen, phosphorus, and potassium. Choose the appropriate type of fertilizer according to the fertilizer requirements of the crop. For example, for crops such as vegetables and fruit trees that require a high amount of nitrogen and phosphorus, you can choose fertilizers containing humic acid, nitrogen, and phosphorus; You can select fertilizers that contain humic acid, nitrogen, and potassium for crops like maize and potatoes that need a lot of these elements; for crops such as fruit trees and flowers that require a high amount of phosphorus and potassium, you can choose fertilizers containing humic acid, phosphorus, and potassium.
The product made by adding dry humic powder to the production process of monoammonium phosphate has the effect of reducing the phosphorus fixation rate in the soil. Humic acid monoammonium phosphate can provide crops with sufficient nitrogen and phosphorus elements, promoting the growth and development of crops. Especially in soils lacking phosphorus, the application effect of monoammonium phosphate is more obvious.
A product made by adding potassium humate to the diammonium phosphate production process that has the effect of reducing the phosphorus fixation rate in the soil.
The product made by adding humic powde potassium to the production process of potassium dihydrogen phosphate has the effect of reducing the fixation rate of phosphorus and potassium in the soil.
22. Humic Acid Three-Element Fertilizer
A fertilizer containing humic acid and three nutrients: nitrogen, phosphorus, and potassium. It has both quick-acting and long-acting functions and is used to improve soil structure, adjust acid-base balance, and enhance crop resistance. It significantly improves the utilization rate of chemical fertilizers by promoting soil aggregate formation and enhancing fertilizer retention capacity.
23. Humic Acid Compound Fertilizer
A fertilizer made by chemical and/or physical methods that contains at least two of the three nutrients of nitrogen, phosphorus, and potassium in specified amounts and a certain amount of water-soluble humic acid.
This article is only part of the full series. If you’d like to read the complete guide, stay tuned for our next installment in this series.
Exploring Humic Acid: Structure and Classification Explained – Part 3
Exploring Humic Acid: Structure and Classification Explained – Part 1
