西红柿营养丰富,是人们喜食的果菜。为了科学施肥,增加产量,降低成本,提高化肥利用率和经济效益的目的,石家庄郊区农业技术推广站,于1984年开始连续三年搞了西红柿土壤最佳供氮指标试验、示范,增产增收,效益明显,据三年试验,结果按最佳供氨指标施肥的亩产均超5000公斤,比习惯施肥的亩增产586—1639公斤,增产10—38.3％, Tomatoes are rich in nutrients, people eat fruits and vegetables. In order to scientific fertilization, increase production, reduce costs and improve fertilizer utilization and economic benefits, Shijiazhuang Agricultural Technology Extension Station, in 1984 for three years in a row to engage in tomato soil optimum nitrogen test, demonstration, increase production and income, Benefit is obvious, according to the three-year trial, the results of the best indicators of ammonia for fertilizer per mu were super-5000 kg, than the conventional fertilization mu yield 586-1639 kg, an increase of 10-38.3%