@article{Liu:11206,
      recid = {11206},
      author = {Liu, Yanyan},
      title = {PROFITABILITY OF SITE-SPECIFIC NITROGEN RECOMMENDATIONS  FOR MICHIGAN CORN},
      address = {2003},
      number = {1097-2016-88706},
      series = {Graduate Research Master's Degree Plan B Papers},
      pages = {76},
      year = {2003},
      abstract = {Site-specific nitrogen application (SSNA) has been  considered a potentially more efficient nitrogen (N)  management than uniform N application (UNA), because it  tailors the N application rate to meet crop needs. However,  previous studies on the profitability of SSNA were  inconclusive. This study examines the conventional N  fertilizer recommendation as a possible reason for the poor  profitability of previous SSNA studies. Most previous SSNA  experiments followed state-level N recommendations based on  yield goals and/or soil nutrient levels that assume corn  yield response to N does not vary site-specifically. This  study challenges that assumption. It examines a set of six  continuous site characteristic variables, more than any  previous study, in order to assess a wide range of site  factors that could affect corn yield response to applied  nitrogen. In examining three years of data on 14 fields in  Central Michigan, this work looks at a longer time series  and wider cross section than comparable research. For the  first time, three years and 13 fields data are pooled  together on the basis of irrigation status to provide an  SSNA recipe. The results suggest that corn yield response  to N does vary site-specifically, but at current prices,  SSNA cannot generate enough benefits to cover its costs on  most cornfields in this region.},
      url = {http://ageconsearch.umn.edu/record/11206},
      doi = {https://doi.org/10.22004/ag.econ.11206},
}