土地肥料研究工作中,田间试验是不可少的方法,在进行田间试验时,要求土壤肥力、质地必须均匀一致,才能使室内土壤分析结果准确,达到试验予期的结果.我们从事试验的地区,位于黄河冲积平原上,为潮土(浅色草甸土)区.从土壤的表面来看,尽管平坦,质地一样,但耕作层 In the field of soil fertilizers research, the field experiment is an indispensable method. During the field experiment, the soil fertility is required and the texture must be uniform so as to make the indoor soil analysis result accurate and achieve the expected result of the experiment. The Yellow River alluvial plain, for the Chao soil (light meadow soil) area from the soil surface, although flat, the same texture, but farming layer