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Keyword [economic effectiveness]
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1. Study On Planting Arrangement Of Double-Cropping System For Wheat And Summer-Corn And Its Techno-Economic Effectiveness
2. Study On The Production Technology Of Small Potted Potato In Potato Field
3. Effects Of Tillage Practices And Planting Patterns On Rice Population Growth Dynamic And Yield In Rice-Wheat System
4. Screening And Evaluation Of Herbicides In Maize-soybean Intercropping Pattern
5. The Study Of The Minimum Cod-end Mesh Size Of Pair Trawl In The Yellow Sea
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