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土壤肥料田间试验自十九世纪早期开始以来,至今已有近二百年的历史.鉴于它在农业生产发展进程中解决了许多有关土壤养分供应、作物需肥规律和肥料性质及其施用方法等重大理论和实际问题,越来越为世界各国土壤农化科学工作者所重视.诸如化学肥料在农业上大量施用,就是借助于田间试验,并推动了世界化肥工业飞速发展.三要素田间试验,为判定各地区土壤中营养元素丰缺程度提供了确切的数据.此外.有许多土壤—肥料—农作物产量之间的关系,如绿肥
Soil fertilizers Field trials have been nearly 200 years old since the beginning of the nineteenth century, given that it has solved many problems relating to nutrient supply to soils, fertilizer-needed patterns of crops and the nature of fertilizers and their application methods etc. Significant theoretical and practical issues, more and more countries in the world agrochemical scientists attach importance to.Such as chemical fertilizer in a large number of agricultural applications, is to resort to field experiments and promote the rapid development of the world’s fertilizer industry.Three elements of field experiments, In order to determine the degree of abundance of nutrients in the soil in various regions provide accurate data.In addition there are many soil - fertilizer - the relationship between crop yield, such as green manure