Humic acid 36.1%ï¼?alginic acid 18.2%, organic matters 48.9%, (N+P2O5+K2O) 20% In addition to alginic acid, seaweed extract also contains essential plant elements such as nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, iron, manganese, copper, zinc, molybdenum, boron, etc. It also contains 18 proteins and amino acids that can be directly absorbed and utilized by plants, as well as plant growth substances, auxins, cytokinins, gibberellins, etc. that have significant effects on plant physiological processes. It also contains vitamins, nucleotides, humic acid and plant stress resistance factors. Seaweed essence integrates plant nutrients, biologically active substances, and plant stress resistance factors. It is an ideal full-function seaweed fertilizer. Physical and chemical properties: 1. Appearance: dark brown or black solid powder, granules or flake 2. PH value: 7.0-11.0 Instructions: Foliar spray: Dilute 1500-3000 times, stir and spray evenly. Root irrigation or drip irrigation: diluted 800-1500 times, 400-1000 grams per mu, the specific usage can be adjusted appropriately according to the local soil fertility. Packing specification: 10kg/bag, kraft paper bag