根据土壤退化的某些微形态诊断特征，将紫色土退化问题归纳为土壤物理性退化、土壤构造性退化和土壤营养性退化等类；
The degradation of purple soils is able to classified into physical, constitutional and ndtriental degradation according to some micro- morphological features.
另一项最新研究发现，单独一次耕作不会对通常不耕作的土地产量或土壤结构造成破坏。
Another recent study found that a single tillage does not harm yield or soil structure in land that is normally not tilled.
用中子活化分析测定土壤中的铀以圈定构造。
Neutron activation analysis for uranium in soild may delineate structures.
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