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Keyword [crop structure]
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1. Oasis Land Use Pattern Change And Its Effect On Regional ET In The Heihe River Basin
2. The Research Of Apiculture And Utilization Of Wild Plants During The Bronze Age In Shandong Region
3. Effects Of Cropland Use Changes On Population Abundance Of Helicoverpa Armigera(hübner):A Landscape Perspective
4. Crop biotechnology, structure of primary production and socioeconomic changes in rural communities
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