主成分分析在喀斯特土壤环境退化研究中的初步运用--以贵州麻山地区紫云县宗地乡为例
주성분분석재객사특토양배경퇴화연구중적초보운용--이귀주마산지구자운현종지향위례
THE TENTATIVE APPLICATION OF THE METHOD OF MAIN INGREDIANT ANALYSIS IN THE RESEARCH OF RETROGRADATION OF KARST SOIL ENVIROMENT-With Special Reference to Zhongdi Township Zhiyun County in Guizhou Province