关键词 土壤资源(s sol resources 第9章 土壤管理( soil management) 土壤利用 (soil utilization) 土壤退化( soil degradation) 土壤质量( soil quality)/土壤健康( health of soil 土壤质量评价 soil quality assessment) PdfcreatedwithpdffactORyProtrialversionwww.pdffactory.com3 关键词 土壤资源(soil resources) 土壤管理(soil management) 土壤利用(soil utilization) 土壤退化(soil degradation) 土壤质量(soil quality)/土壤健康(health of soil) 土壤质量评价(soil quality assessment) PDF created with pdfFactory Pro trial version www.pdffactory.com