PDF(6070 KB)
PDF(6070 KB)
PDF(6070 KB)
基于空间聚类分层抽样的黄骅市县域耕地质量等别监测样点布设
({{custom_author.role_cn}}), {{javascript:window.custom_author_cn_index++;}}The layout of county area cultivated land quality monitoring samples in Huanghua City based on spatial clustering stratified sampling
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