By combining the special natural conditions in karst mountain area, the necessity and importance in strengthen the research on soil tillage erosion is put forward.
本文还结合岩溶山区特殊的自然环境条件，提出了加强岩溶山区土壤耕作侵蚀研究的必要性和重要意义。
Tillage erosion is a new field of soil erosion research.
耕作侵蚀是国际上新近开展的一个研究领域。
Soil tillage changes the soil environment. But the effect of long-term soil tillage on kernel quality of winter wheat needs further research.
土壤耕作可改变土壤环境，但耕作方式对冬小麦品质的长期影响仍有待于进一步研究。
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