During a single growth season, a plot trial was carried out in a selected heterogeneous field in Denmark in an attempt to estimate the optimal variable nitrogen rate applied to winter wheat. 61 Nitrogen/grain yield dose–response curves were estimated using five nitrogen application rates (30, 90, 120, 180, and 240 kg N ha−1). Provided the dose–response curves were given in advance, enabling optimal nitrogen redistribution, the resulting gain in grain yield would have been less than 0.3 t ha−1. However, from an environmental point of view the data showed that significant nitrogen reductions could be obtained without significant yield loss applying a variable nitrogen application strategy compared to a uniform application.
Keywords: variable nitrogen application; optimal nitrogen rate; dose response curve
|Publication status||Published - 2009|
|Event||10th International Conference on Precision Agriculture - Denver, United States|
Duration: 18. Jul 2010 → 21. Jul 2010
Conference number: 10
|Conference||10th International Conference on Precision Agriculture|
|Period||18/07/2010 → 21/07/2010|