一、土壤分析在作物的营养研究中,必须考虑土壤肥力状况与栽培作物的特殊需要的关系。就椰子树来说,有许多因素限制使用标准的土壤化学分析方法来进行营养的诊断。例如,在太平洋区域的许多地方,椰子树生长在从地质学时代来说是非常年青的珊瑚土上,按照公认的土壤定义,这种土壤几乎不能称为土壤。它有时含碳 Soil Analysis In crop nutrition research, the relationship between soil fertility and the specific needs of cultivated crops must be considered. For coconut trees, there are many factors that limit the use of standard methods of soil chemistry for nutritional diagnosis. For example, in many parts of the Pacific, coconut trees grow on very young coral in geologic age and, according to accepted soil definitions, can hardly be called soil. It sometimes contains carbon