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随着农业生产水平的不断提高，化肥用量日益增加，化肥的增产作用愈加显著。资料表明，我国粮食增产的５０％是靠化肥取得的。由此可见化肥施用在农业生产中具有举足轻重的地位。目前，很多地方氮肥底施多采用人工撒施、畜力耕翻的方法，化肥不能均匀地撒落田间，追肥多采...
With the continuous improvement of agricultural production, increasing use of chemical fertilizers, fertilizer production more significant role. Data show that 50% of China’s grain production is achieved by fertilizer. This shows that fertilizer application plays a decisive role in agricultural production. At present, many places at the end of the application of nitrogen fertilizer by artificial spread, animal husbandry plowing method, chemical fertilizer can not evenly sprinkle the field, topdressing and more mining ...