The important factors affecting nitrogen fertilizer efficiency
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The soil is also highly selective for different types of nitrogen fertilizers. Acidic soils can be selected from alkaline and physiological alkaline fertilizers and neutral fertilizers such as ammonia, ammonium bicarbonate, urea, and calcium nitrate. Application of nitrogen fertilizer on sandy soil should be performed a small number of times, and basal fertilizer should be used less frequently to increase the frequency of topdressing and it is not suitable for application of nitrate nitrogen fertilizer.
The nutritional characteristics of the crop. Crops are also selective for nitrogen fertilizers. Different crop types have different choices for nitrogen fertilizers. Rice, wheat, sorghum, corn and other cereal crops, as well as cotton, vegetables, and fruit trees are more nitrogen-needed crops, and the amount of nitrogen fertilizer should be greater. Soybeans, peanuts, and other legume crops have symbiotic nitrogen fixation with rhizobia, and the requirements for nitrogen are not urgent and can be applied with little or no nitrogen fertilizer.
Different varieties of the same crop require different fertilizers. Hybrid rice and japonica rice in rice have more developed root systems and more nitrogen is absorbed and required than conventional rice.