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旱地农业
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旱地农业
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农学
旱地农业
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dryland agriculture
旱地农业
在降水稀少又无灌溉条件的干旱、半干旱和半湿润易旱地区,主要依靠天然降水和采取一系列旱作农业技术措施,以发展旱生或抗旱、耐旱的作物和牧草为主的农业。又称旱作农业或雨养农业。
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Linear A
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Linear Algebra PACKage
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Linear Analysis
linear analysis
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