1. The functional ingredients of mineral potassium fulvic acid are humic acid, potassium fulvic acid, potassium oxide, and do not contain nitrogen, phosphorus and other elements. Moreover, the potassium oxide content is 12%, which is far from meeting the requirements for fruit enlargement and color change. Therefore, it is recommended to mix it with compound fertilizer or single chemical fertilizer.
2. Potassium fulvicate from mineral sources is not a panacea. Application in the early growth stage, seedling stage, and reproductive growth period of crops requires the participation of different fertilizers. When applying these fertilizers, they can be used together with mineral potassium fulvic acid. It can synergize with other fertilizers.
3. Mineral potassium fulvicate cannot achieve significant results on all crops and all soils. Different crops absorb potassium fulvic acid from mineral sources to different extents. Like conventional fertilizers, potassium fulvic acid from mineral sources can only help weak but not strong fertilizers. Soils lacking organic matter have an obvious effect on increasing production, while land rich in organic matter has little effect on increasing production.
4. There are taboos in the use of potassium fulvic acid from mineral sources: it is not suitable to spray foliage or spray at high concentrations during the fruit color change and fruit expansion stages, otherwise it will easily contaminate the foliage and fruit surfaces. Pay attention to the flocculation limit of mineral potassium fulvic acid, and do a small experiment before application.