Three common methods for soil testing and formula fertilization Soil testing and formula fertilization is a measure proposed by the state in recent years to speed up agricultural development, increase agricultural productivity, and protect soil ecological environment. Determination of nutrient fertility of local soils by using soil testing and formula fertilization meter, and based on the law of crop manure requirements, soil nutrient supply performance and fertilizer efficiency, the appropriate amount and proportion of nitrogen, phosphorus, potash and trace elements were provided on the basis of farmyard manure application. As well as the corresponding fertilization techniques, it can also be said that the formula fertilization is to adjust the supply and demand balance of nutrient elements required for soil supply of sugar and sugar cane by fertilization methods, to find out the optimal dosage and suitable ratio, to be scientific and rational, Quantitative. The methods of formula fertilization for crops include land division (level) allocation method, target yield allocation method, and field test allocation method. 1 Fertility Division Method The method of fertility partitioning means that the fields are divided into different grades according to the conditions of fertility, and then formula fertilization is performed for different zones or grades of land. Soil partition zoning method According to the results of soil testing in the sugarcane area, according to the soil nutrient value, the high, medium and low soil fertility grades are classified, and a number of soil fertility grades can also be assigned based on the yield basis. In a larger area, the sugarcane field can be diced according to topography, landform and soil texture, and then each area can be divided into several soil grades, each of which is used as a formula area. 2 Fertility methods Based on the regional differences in soil fertility, on the basis of zoning, different fertilization formulas, dosages and specific application methods were applied for the soil nutrient status and field test results in different areas. 3 target yield ratio method The target yield ratio method is a method for determining the amount of fertilizer based on the output index. There are two methods for the target yield ratio method, one is the nutrient balance method, and the other is the subtraction method for fertility.
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