1、Incorporation of humic

However, the incorporation of molecules containing humic substances into the granules of compound NPK fertilizers is not a common practice mainly due to technical difficulties and problems associated with the manufacture process of these mineral fertilizers.

2、Differences of C sequestration in functional groups of soil humic acid under long term application of manure and chemical fertilizers in

Compared to manure treatments, C sequestration in alkyl C favours short-chain (CH 2) n in chemical fertilizer treatments.

3、Humic products in agriculture: potential benefits and research challenges—a review

To improve the credibility of humic products, we identify four knowledge gaps and propose pathways of future action to close these gaps.

Characterization of humic acids derived from Leonardite using a solid

Understanding chemistry and the effects of humic substances on plant growth is important for using organic fertilizer or soil amendment for sustainable snap bean production.

Differences of C sequestration in functional groups of soil humic acid under long term application of manure and chemical fertilizers in North China

Dive into the research topics of 'Differences of C sequestration in functional groups of soil humic acid under long term application of manure and chemical fertilizers in North China'.

COMPARING THE IMPACT OF DIFFERENT SOURCES AND LEVELS OF MANUFACTURED AND COMMERCIAL ORGANIC FERTILIZERS ON THE QUALITATIVE CHARACTERISTICS OF FENUGREEK

The humic acids work as well towards increasing nutrient availability in soil and increase the ability of the plant for osmotic stress and toxicity tolerance. A study was conducted for the purpose of evaluating humic acid application at of 2ml/l and 4ml/L concentration levels on the characteristics of growth and the active fenugreek compounds.

Analytical Study Of Humic Acid From Various Sources Commonly Used As Fertilizer: Emphasis On Heavy Metal Content

Present study also documented that the spectroscopic and imaging techniques can be successfully used to bring out the finer differences among HA extracted from different sources. It brings out the relative merits and demerits of vermi compost, sludge and lake sediment as compared to cow dung manure.

Structure

2. Humic Acid Molecular Structure and Functional Groups Humic acid is a natural organic fertilizer characterized by a complex molecular structure that includes functional groups such as carboxyl (–COOH), alcoholic (–OH), carbonyl (C=O), and phenolic (Ar-OH) moieties [43].

The effect of humic substances on winter wheat yield and fertility of ordinary chernozem

It was shown that pre-sowing seed treatment, the treatment of vegetative plants and soil with the preparation contributes to higher grain yields in comparison with the control variant. This effect is due to the presence of physiologically active substances - humic acids in the preparation.

Phosphorus fertilizer recovery from calcareous soils amended with humic and fulvic acids

To study the effect of high molecular weight organic compounds on the recovery of applied P, a mixture of humic and fulvic acids was applied to calcareous soils with different levels of salinity and Na saturation which were fertilized with 200 and 2000 mg P kg −1 as NH 4 H 2 PO 4.

Humic acid fertilizer and compound fertilizer are two distinct types of fertilizers, differing significantly in composition, function, and application methods. Below is a detailed comparison of the two:

I. Composition Differences

1. Humic Acid Fertilizer: Primarily composed of organic matter derived from the decomposition and transformation of animal and plant residues by microorganisms. Its main components include humic acid, amino acids, sugars, vitamins, minerals, and other substances. It improves soil structure, enhances fertility, and promotes crop growth.
2. Compound Fertilizer: Made from chemically synthesized or naturally extracted mineral nutrients, such as nitrogen (N), phosphorus (P), and potassium (K). It contains multiple essential nutrients to meet plants’ growth requirements.

II. Functional Differences

1. Humic Acid Fertilizer: Focuses on improving soil structure, water retention, and nutrient-holding capacity. It promotes root development, enhances crop stress resistance, and increases beneficial soil microorganisms, fostering a stable ecosystem.
2. Compound Fertilizer: Provides a balanced supply of essential nutrients for rapid absorption, boosting crop yield and quality.

III. Application Differences

1. Humic Acid Fertilizer: Typically used as a base fertilizer or supplementary fertilizer. Dosage should be adjusted based on crop type and soil conditions, often mixed with organic fertilizers for optimal results.
2. Compound Fertilizer: Can be applied as a base or supplementary fertilizer but requires careful dosage control to avoid over-fertilization. Application should align with crop needs and soil testing results.

IV. Price Differences

1. Humic Acid Fertilizer: Generally cheaper due to widespread raw materials, though production costs may rise due to complex processing.
2. Compound Fertilizer: More expensive due to intricate manufacturing, high raw material costs, and the inclusion of multiple chemical elements. Prices vary by brand and formulation.

V. Environmental Impact Differences

1. Humic Acid Fertilizer: An eco-friendly "green fertilizer" that poses no pollution risk to soil or water. It enhances soil self-purification and reduces reliance on synthetic chemicals.
2. Compound Fertilizer: May involve environmental risks during production (e.g., hazardous byproducts). Excessive use can lead to soil degradation or water contamination, requiring controlled application.

VI. Applicable Scenarios

1. Humic Acid Fertilizer: Suitable for all soil types, especially poor, sandy, or saline-alkali soils. Widely used for fruit trees, vegetables, flowers, and other crops.
2. Compound Fertilizer: Ideal for high-yield or nutrient-demanding crops (e.g., grains, cash crops). Also applicable to specialized plants like medicinal or ornamental species.

Humic acid fertilizer and compound fertilizer differ markedly in composition, function, application, cost, environmental impact, and suitability. The choice depends on crop type, soil conditions, and nutritional requirements.