One:What is fertilizer?
All apply in the soil or spray on crop ground part, can supply crop nutrient directly or indirectly, increase crop yield, improve product quality or can improve soil character, raise fertilizer the material of fertility, call fertilizer. Fertilizers that directly supply essential nutrients to crops are called direct fertilizers, such as nitrogen, phosphate, potash, trace elements, and complex fertilizers all fall into this category. Some fertilizers are called indirect fertilizers, which are mainly used to improve the physical, chemical and biological properties of soil and thus improve the growth conditions of crops.
Two: What kinds of fertilizers are there?
Chemical composition: organic fertilizer, inorganic fertilizer, organic and inorganic fertilizer;
According to nutrient cent: simple qualitative fertilizer, compound fertilizer ;
According to the mode of fertilizer effect: quick effect fertilizer, slow effect fertilizer;
According to the physical status of fertilizer: solid fertilizer, liquid fertilizer, gas fertilizer;
According to the chemical properties of fertilizers: alkaline fertilizer, acid fertilizer, neutral fertilizer;
Three:What are the main varieties of nitrogen fertilizer?
The main varieties of nitrogen fertilizers are as follows:
ammonium nitrogen fertilizer: ammonium sulfate, ammonium chloride, ammonium bicarbonate, ammonia water and liquid ammonia;
nitrate nitrogen fertilizer: sodium nitrate, calcium nitrate;
ammonium nitrate nitrogen fertilizer: ammonium nitrate, calcium ammonium nitrate and ammonium sulphate;
amide nitrogen fertilizer: urea, calcium cyanamide