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大田作物中的密植作物如:水稻、小麦、谷子的小区面积可以小些,而其他比较宽株距作物的小区面积要大些,蔬菜试验地虽然土壤差异较小,但所需小区面积仍然因蔬菜类型而不同。在一个处理总面积相等情况下,扩大小区面积不如增加重复次数为合适。每小区的边行不应该计算在产量之内。面积小的小区以采用方形为合适,面积大的小区以采用长方形为合适。随机区组排列较对照区对比排列为精确。在复因子试验时倘重点是主要试验目的的处理和它的连应,采用裂区排列较随机区组排列为合适。
Field crops in densely populated crops such as: rice, wheat, millet area can be smaller, and other relatively wide plants from the crop area larger, although the difference in soil testing of vegetables is small, but the required area is still due to vegetables Type and different. In a case where the total area under treatment is equal, it is better to increase the number of repetitions than to enlarge the area of a plot. The perimeter of each plot should not be calculated within production. Small area of the cell to adopt a square for the right, large area to use rectangular as a suitable. The random block arrangement is more accurate than the control area. In the case of complex factorial tests, where the focus is on the treatment of the main experimental purpose and its contingency, the use of split-zone arrangements is more appropriate than the randomized block arrangement.