Secondary land use capacity

Assessment of the utilisation capacity of secondary soils (by frequency) according to the USDA method in 8 classes. The assessment is carried out on natural soil, does not consider any anthropogenic interventions (e.g. structured irrigation, remediation, etc.)基于美国农业部（USDA）方法，按频度划分为8个等级的次生土壤利用能力评估。本评估以天然土壤为研究对象，未纳入任何人为干预措施（如人工灌溉、土壤修复等）。