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Browsing by Author "Reilly, Evelyn"

Now showing 1 - 2 of 2
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    Impacts of Soil Health Management on Environmental Quality: A Research Review for Minnesota
    (2022-10) Reilly, Evelyn; Cates, Anna
    This review was undertaken to summarize research on the impact of four in-field practices (cover crops, reduced tillage, perennials, and crop rotations) on nutrient losses, soil carbon, and runoff/erosion in Minnesota. Social, economic, and policy considerations, while highly relevant to agricultural decision making and design of incentives, are beyond the scope of this review. To maximize relevance of findings, this review focused on data from studies conducted in Minnesota, along with data from Wisconsin, Iowa, Michigan, South Dakota and Illinois if applicable. Since Minnesota has unique climatic conditions, findings from meta-analyses were not included, except as background or where regional differences were noted.
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    Intermediate Wheatgrass Nitrogen Dynamics: Nitrate Leaching Prevention and Nitrogen Supply via Legume Intercrops
    (2021-07) Reilly, Evelyn
    We compared soil and soil water nitrate concentrations, root biomass, and yield in intermediate wheatgrass (IWG; Thinopyrum intermedium) and a corn-soybean rotation over three years. Nitrate was 77-96% lower under IWG than the annual system, while root biomass was higher. IWG grain yields were 854, 434, and 222 kg ha-1 for Years 1-3 and biomass averaged 4.65 Mg ha-1 yr-1. IWG effectively reduces soil solution NO3--N concentrations even on sandy soils, supporting its potential for broader adoption on vulnerable land. We also assessed grain and biomass yield and N dynamics in response to mineral fertilizer and six legume intercrops. Treatments affected N dynamics and IWG biomass but not grain yields. N transfer rates ranged from 0 to 27% but legume biomass was negatively associated with IWG grain yield, suggesting competition in addition to nitrogen supply. Overall, alfalfa, red clover, and birdsfoot trefoil were among the best options for intercrops.