First, fertilizer mix. Remember that "five-immiscible": 1, manure, urine, and other farmyard fertilizer can not be mixed with grass ash, lime nitrogen, lime, calcium magnesium phosphate fertilizer and other alkaline fertilizers. The main ingredient of human and animal waste is urine, which is mixed with strong alkaline fertilizers and will neutralize failure. 2. Superphosphate can not be mixed with alkaline fertilizers such as grass ash, lime nitrogen and lime, which will reduce the effect of phosphate fertilizer. Phosphate rock powder, bone powder and other insoluble phosphate fertilizers can not be mixed with alkaline fertilizers such as grass ash, lime nitrogen, and lime. Mixing organic acids that will neutralize the soil will make phosphate fertilizers harder to dissolve and crops will not be able to absorb and use. 3, calcium magnesium phosphate fertilizer and other alkaline fertilizers can not be mixed with ammonium nitrogen fertilizer. If alkaline fertilizers are mixed with ammonium nitrogen fertilizers such as ammonium bicarbonate, ammonium sulfate, ammonium nitrate, ammonium chloride, etc., the volatilization loss of ammonia will be increased and the fertilizer efficiency will be reduced. 4. Unripe farmyard fertilizers cannot be mixed with ammonium nitrate. If it is mixed with ammonium nitrate, nitrogen will be lost during the decomposition and decomposition of the unripe farmyard manure and the fertilizer effect will be reduced. 5. Chemical fertilizers cannot be mixed with bacterial fertilizers. Chemical fertilizers have strong corrosiveness, volatility, and water absorption. If they are mixed with rhizobia and other bacterial fertilizers, they will kill or inhibit viable bacteria and render bacterial fertilizers ineffective. Second, mixed fertilizers. It is important to keep in mind that "four non-mixed": 1, alkaline fertilizers such as ammonia, lime nitrogen, and ash can not be associated with trichlorfon, dimethoate, methamidophos, imidazole, thiophanate, jinggangmycin, carbendazim, leaf Mixtures of pesticides such as loquat, pyrethroid insecticides and other pesticides will reduce the efficacy of pesticides. 2, alkaline pesticide lime sulfur, Bordeaux mixture, pine resin, etc., can not be mixed with ammonium bicarbonate, ammonium sulfate, ammonium nitrate, ammonium chloride and other ammonium nitrogen fertilizer and superphosphate mixed use, mixing will make ammonia volatilization loss , reduce fertilizer efficiency. 3, arsenic-containing pesticides, such as calcium arsenate, aluminum arsenate, etc. can not be mixed with potassium salt, sodium salt fertilizers, will produce soluble arsenic and phytotoxicity. 4, chemical fertilizers can not be mixed with microbial pesticides. Chemical fertilizers are very volatile and corrosive. If it is mixed with microbial pesticides such as acaricidal bacteria and adult worms, it is easy to kill microorganisms and reduce the control effect.