Factors Affecting Nitrogen Fertilizers

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There are many factors that affect nitrogen fertilizer efficiency, mainly are soil quality, soil types, crop nutrition and characteristics.

Soil quality — First, we should consider the nitrogen supply level of soil itself and apply the nitrogen fertilizer locally. According to the status of soil fertility to determine the amount of fertilizer. Generally,soil with high fertility should be applied little fertilizer and soil with low fertility should be applied more fertilizer. The applying ratio of nitrogen fertilizer to soil with medium and low fertility was higher than that of soil with high fertility because the yield of soil with mid-low fertility is greater than that of soil with high-fertility.

For different types of nitrogen fertilizer, soil will have different choices. Acidic soil can choose alkaline fertilizer and physiological alkaline fertilizer and neutral fertilizer, such as ammonia, ammonium bicarbonate, urea, calcium nitrate and so on. Sandy soil can apply nitrogen fertilizer which should be a small number and more times,as well as the base fertilizer should be applied little and the topdressing fertilizer should be applied more. Nitrate nitrogen is not suit for sandy soil.

Nutritional characteristics of crops — Crops are also selective for nitrogen fertilizers, and different crops need different variety of nitrogen fertilizers. Rice, wheat, sorghum, corn and other cereal crops, as well as cotton, vegetables, fruit trees need more nitrogen fertilizer, we should apply more nitrogen fertilizers. Soybean, peanuts and other legumes have Rhizobium which can generate solid nitrogen, we can apply little or no nitrogen fertilizer.

The article is quoted from: http://www.fert.cn/1005/

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