Showing 221 - 240 results of 915 for search '"Illinois"', query time: 0.05s Refine Results
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    Building English Skills : Blue level.

    Published 1998
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    The Operation ,Care and Repair of Farm Machinery/

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    Effects of 24 Years of Conservation Tillage Systems on Soil Organic Carbon and Soil Productivity by Kenneth R. Olson, Stephen A. Ebelhar, James M. Lang

    Published 2013-01-01
    “…The 24-year study was conducted in southern Illinois (USA) on land similar to that being removed from Conservation Reserve Program (CRP) to evaluate the effects of conservation tillage systems on: (1) amount and rates of soil organic carbon (SOC) storage and retention, (2) the long-term corn and soybean yields, and (3) maintenance and restoration of soil productivity of previously eroded soils. …”
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