Results 241 to 242 of about 4,847 (242)
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Steam Plows
Scientific American
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(10.1038/scientificamerican11011856-59f)
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Green's Plows
Scientific American
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(10.1038/scientificamerican02171866-115)
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productivity
tillage
disking
yield
winter wheat
обработка почвы
no-till
mineral fertilizers
minimum tillage
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