Inorganic salts, anti-caking agent. Some inorganic salts can partially hydrated or fully hydrated, which in combination with the fertilizer in the water, fertilizer suppressed due to moisture caused by anti-caking agents dissolved fertilizer manufacturers, to prevent crystallization fertilizer compaction. Such anti-caking agent is particularly suitable crystalline fertilizer such as urea, ammonium nitrate and ammonium sulfate. Internal anti-caking agents mainly used in fertilizer production process fertilizer anti-caking agents companies can improve moisture (critical relative humidity increase fertilizer anti-caking agents, or slow absorption rate); increase the strength of the fertilizer particles, roundness or change the crystal morphology [38]. Studies have shown that certain inorganic substances such as aluminum sulfate (Mg), potassium nitrate (magnesium, aluminum), ammonium polyphosphate (potassium), boric acid, copper oxide (iron, aluminum, magnesium) and the like, as well as certain organic compounds, such as p-toluidine, azobenzene, to prevent caking of fertilizer has a role [26, 32]. Fertilizer anti-caking agent credibility, Weifang Fuyuan (certified), anti-caking agents of fertilizer provided by the Environmental Protection Technology Co., Ltd. Weifang Fuyuan. Weifang Fuyuan Environmental Technology Limited (www.wfdafuyuan.com) (www.wfdafuyuan.com) Shandong Weifang, other leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer demand. In Weifang Fuyuan leadership with the staff warmly welcome all inquiries negotiations to create Weifang Fuyuan better future.