一、试验目的当前农业科研单位在进行田间试验设计时,由于要节省试验地,以及受人力、物力等各种条件的限制,试验小区面积有偏小的趋势。根据田间试验设计原理分析,随小区面积缩小,一般都会因增加土壤误差而降低试验结果的精确性。为了解决缩小小区面积以后,仍能保证试验结果精确性,于1980年与1981年进行了小麦(代表细粮作物)、大豆(代表油料作 First, the purpose of the experiment At present, agricultural research institutes in the field of experimental design, due to save test sites, as well as by manpower and material resources and other conditions, the test area tends to be small. According to the field experimental design principle analysis, with the area of ​​the smaller area, usually due to increased soil error and reduce the accuracy of the test results. In order to solve the problem of reducing the size of the plot, the accuracy of the test results can still be guaranteed. Wheat (representing fine grain crops), soybean (representing oilseeds