... high ( the organic matter more than 20%, amino acids 10% above), promoting nutrient absorption and utilization, so that the ... NPK elements function into full play, slow lasting supply crop growth demands, effectively increasing the soil organic matter, soil improvement, ... , jujube, grape, orange170-220KGS/MUBase fertilizer use: deep buried 10-15 cm, one-time fertilization.To use: after ditching and ...