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qian tan wo guo de bao hu xing geng zuo ti xi
Author(s): 
Pages: 114
Year: Issue:  2
Journal: Farm Machinery Using & Maintenance

Abstract:  保护性耕作是对农田实行免耕、少耕,用作物秸秆覆盖地表,减少风蚀、水蚀,提高土壤肥力和抗旱能力的先进农业耕作技术.
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