How to use humic acid for plants and quality standard of humic acid.
The previous article “The concept and mechanism of humic acid” popularized the concept of humic acid and its mechanism of action for everyone. Today, this article will continue to explain how to use humic acid for plants and quality standards of humic acid products. How to use humic acid for plants and quality standard of humic acid. At present, humic acid fertilizers are still under continuous development, and their product quality inspections are mostly based on industry and local standards, and the application methods vary from product to product. Application method and quality standard of sodium humate The national industry technical standard ZBG21005-87 stipulates that the humic acid content (dry basis) of the first, second, and third products shall not be less than 70%, 55%, and 40% respectively, and the pH value shall be 8.0~9.0, 9.0~11.0, 9.0, respectively. ~11.0, the water-insoluble content (dry basis) does not exceed 10%, 20%, and 25% respectively. The app...