论文部分内容阅读
一九四八年曾在堪萨斯洲西部取过10个点的土样,一九八四年又对这些点重新取样以比较地表10cm土层中土壤颗粒分布(质地)及土壤中有机质含量的变化.除一个点
In 1948, 10 samples of soil samples were taken in the western part of Kansas Island. In 1984, these samples were resampled to compare the distribution of soil particles (texture) and soil organic matter content in the 10 cm soil layer Except for one point