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1. Observational and Modeling Methods to Inform Ecosystem Service MarketsInterest in quantifying the impacts of land management on ecosystem services has grown as governments, environmental organizations, and corporations have pledged to reduce greenhouse gas emissions, nutrient leaching, and other environmental impacts of human activities. Ecosystem service markets were formalized in the 1990s and originally deployed to mitigate point sources of air and water pollution. Associated protocols were fairly simple and easy to implement because quantification of point sources... S.J. Del grosso, J. Delgado, D. Manter, C. Stewart, M. Vigil |
2. Long-term Crop Rotation Diversity Effects on Soil C and NThe objective of this study was to evaluate the effects of nitrogen (N) fertilizer level and crop rotation diversity on soil organic carbon (SOC) and N stocks from a 34-yr study located in eastern Nebraska. Seven crop rotations (three continuous cropping systems; two 2-yr crop rotations, and two 4-yr crop rotations) and three N levels were compared. Soil samples were taken to a depth of 60-inches. Differences in SOC stocks were largely confined to the 0 to 3-inch depth with greater SOC (P =... M. Schmer, V. Jin, B. Wienhold, G. Varvel |
3. Evaluation of N Source in No-till Winter WheatNitrogen (N) source efficacy is dependent upon product used, application timing, and the condition of the environment in which it is placed. This study serves to look at how different N sources can be affected across different regions of Oklahoma, specifically in a heavy residue, no-till environment. N sources that were included in the study were Urea, Urea-Ammonium Nitrate (UAN), UAN + Anvol, and SuperU. The N sources were evaluated across nine site-years (SY) where each product had four... J. Derrick, B. Arnall, M. Smith, J. bigatao souza |