Patent ID: 8520891
Filing Date: 2013-08-27
Classification: A01C,G06K

Abstract:
1. A method of determining a nitrogen fertilization rate of a crop field at mid-season to ameliorate nitrogen deficiency using a spatially referenced map of relative green values (RG), wherein each RG comprises the reflectivity of green light at a location in a canopy of the crop field relative to a reference RG, the method comprising: a. estimating an economically optimal nitrogen rate (EONR) corresponding to each RG of the spatially referenced map by substituting each RG into the equation wherein C b. mapping each EONR corresponding to each RG onto a spatially referenced EONR map; wherein each EONR comprises a recommended amount of nitrogen per unit area to be applied at mid-season in order to minimize a predicted crop yield loss due to nitrogen deficiency.