Rex A. Omonode

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Conversions of Mollisols from prairie to cropland and subsequent changes in crop production practices in the Midwestern USA have resulted in changes in soil organic matter. Few studies have used archived samples, long-term resampling of soils to a depth of 1 m, and space for time studies to document these changes. We resampled soils by depth (0-100 cm) in(More)
For various reasons, North American crop farmers are more likely to practice limited-duration no-till than continuous no-till (NT). Little is known about effects of short-term no-till (ST-NT) on organic C and total N relative to NT and conventional-till systems. A field experiment was initiated in 1980 to study the effects of NT, chisel plow (CP), and(More)
Few studies have assessed the common, yet unproven, hypothesis that an increase of plant nitrogen (N) uptake and/or recovery efficiency (NRE) will reduce nitrous oxide (N2O) emission during crop production. Understanding the relationships between N2O emissions and crop N uptake and use efficiency parameters can help inform crop N management recommendations(More)
Tony J. Vyn, Lilly Hall of Life Sciences, Department of Agronomy, Purdue University, West Lafayette, IN 47907-2054, tvyn@purdue.edu (* corresponding author) Rex A. Omonode, Lilly Hall of Life Sciences, Department of Agronomy, Purdue University, West Lafayette, IN 47907-2054, romonode@purdue.edu Doug R. Smith, National Soil Erosion Research Laboratory, USDA(More)
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