Peanuts have a wide range of adaptability to soil, but high-yield peanut fields require good soil conditions. The most suitable planted on the sandy soil, the sandy loam in the upper Panasonic, the speed of rain does not drain water, drought speed irrigation water fast; plowing depth of up to 30 cm. Calcium-rich, organic content of about 1% is appropriate, more than 2% of the pods are contaminated, the quality is reduced, it is appropriate to plant a new depression, weight loss 1 year about 20% reduction, suitable for rice, corn and other crop rotation.
Peanut's fertilizer requirements. Each production of 100 kilograms of pods requires 4.5-6 kilograms of pure nitrogen, 0.8-1.3 kilograms of phosphorus pentoxide and 3-4.5 kilograms of potassium oxide. Seedling fertilizer absorption is very small, less than 10% of the total, but the nitrogen, phosphorus, potassium fertiliser critical period, such as lack of fertilizer will hinder the emergence of strong seedlings and nodule formation. The early flowering needle stage of late-maturing peanuts or the late-maturing peanuts' scab stage is the peak period of nitrogen uptake of nitrogen, phosphorus, and potassium fertilizers, and the uptake of fertilizer is about 60% of the total. The fruit ripening period and the amount of fertilizer accounted for only about 10% of the total. The ratio of N, P and K absorbed by peanuts is 3:0.4:1. However, the supply of nitrogen to peanuts by rhizobia can reach 2/3-4/5. In fact, it is required that the level of nitrogen application is not high, which highlights the nutritional characteristics of cadmium and calcium in peanuts. In addition, peanuts are also very sensitive to magnesium, sulfur and molybdenum, boron, manganese, iron, etc.
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