In the past, it often has been hard to get complete information about soil conditions.
过去，关于土壤条件的完整信息常常很难获得。
The third part for the country the soil resources information library establishes the method.
第三部分为国土资源信息库的建立方法。
The third part for the country the soil resources information library establishes the method.
第三部分为国土资源信息库的建立方法。
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