The combination of nutrients and humic acid phase can improve the absorption of nutrients, maintain a nutritional balance; improve soil structure, increase the liquidity of the soil, the optimization of plant absorption of N, P, K; adjust the soil pH; reduce nitrate into groundwater, groundwater resources protection: improve crop resistance, such as the ability of anti collapse resistance drought resistance, insect resistance, disease resistance, and stable; nitrogen, improve nitrogen fertilizer (urea as additives).