论文部分内容阅读
土壤普查工作中的土样分析,目的在于摸清土壤养分状况和其它性状,为因土改良,固土施肥,因土种植提供科学依据。由于土样数量多,分析时间长,地点分散,设备不同,人员水平高低不一,很易造成误差。因此提高土样分析质量,是搞好土壤普查工作的重要一环。 (一)衡量土壤分析质量的基本方法分析质量主要取决于精密度和准确度。前者指同一组分析值重现性的大小程度;后者指分析数值与真值的符合程度。实际上准
The purpose of soil sample analysis in soil census is to find out the status of soil nutrients and other traits and provide a scientific basis for soil improvement, solid-earth fertilization and soil-planting. Due to the large number of soil samples, long analysis time, scattered locations, different equipment and different personnel levels, it is easy to cause errors. Therefore, to improve the quality of soil samples is an important part of the soil census. (A) the basic method of measuring the quality of soil analysis The quality of analysis depends mainly on the precision and accuracy. The former refers to the same group of analysis of the value of the size of the reproducibility; the latter refers to the analytical value and the true value of the degree of compliance. In fact accurate