Water-soluble fertilizer refers to the compound fertilizer containing nitrogen, phosphorus, potassium, calcium, magnesium, trace elements, amino acids, humic acid, alginic acid, which can be completely dissolved in water. There are two forms of solid water-soluble fertilizer and liquid water-soluble fertilizer. In terms of nutrient content, there are large element water-soluble fertilizer, medium element water-soluble fertilizer, trace element water-soluble fertilizer, amino acid water-soluble fertilizer, humic acid water-soluble fertilizer, organic water-soluble fertilizer.
