Data For Relationships of Nitrous Oxide Emissions to Fertilizer Nitrogen Recovery Efficiencies in Rain-fed Corn Systems: Research Foundation Building

<p>We initiated experiments in 2015 and 2016 at different locations in Indiana to generate field data to test the hypothesis that increase in NRE will lead to significant reduction of N2O during corn production.  Our specific objectives were to assess the relationships between N2O and NRE as affected by (i)  ecological intensification vs. farmers’ practice (ii) tillage intensity: reduced (no-till, strip vs. intensive ( chisel and moldboard plow) tillage systems, and (iii) N timing: early (V6) vs late (V12-14) growth stage application.</p>

<p>Core ideas included (i) seasonal N2O losses were lower for reduced tillage, ecological intensification and for split application (ii) negative linear relationships existed between NRE or NUE and N2O, regardless of tillage and N management  (iii) rate of cumulative N2O emission declined per unit gain in NRE across management.</p>

<p>The Data Dictionary described all the parameters measured, units of measurement and information regarding formula used to calculate values for some of the variables where not provided by the original author/source of raw data.  The dataset is provided in excel format.  Detailed data analysis for the tillage data is provided in publication: Omonode and Vyn (2019), Tillage and Nitrogen Source Impacts on Relationships between Nitrous Oxide Emission and Nitrogen Recovery Efficiency in Corn., J. Environ. Qual. doi:10.2134/jeq2018.05.0188</p>