Document Type
Patent
Publication Date
8-25-2015
Abstract
Systems and methods of determining nitrogen levels from a digital image and in-season nitrogen measurement and fertilization of non-leguminous crops from digital image analysis are disclosed. In particular, a method of determining leaf nitrogen concentration and yield from a digital photograph of a fully developed leaf (collared leaf) of a crop of non-legumes, such as corn, wheat, rice, cotton, potatoes sugarcane, turfgrass or forage grass species. The digital image is processed to determine a dark green color index ("DGCI"), which is closely related to leaf nitrogen concentration and yield. Standardized color disks having known DGCI values are included in the digital photograph and serve as an comparative standard. The comparative standard allows correction of DGCI of samples when using different cameras and/or when lighting conditions change. The DGCI values can then be used to determine the amount of nitrogen fertilizer that should be applied to recover crop yield potential.
Department
Crop, Soil & Environmental Sciences; Horticulture
Patent Number
US9117140
Application Number
US20130044919 A1
Application Published
2-21-2013
Application Filed
10-16-2012
Assignee
Board of Trustees of the University of Arkansas (Little Rock, AR)
Citation
Purcell, L. C., Siddons, U. G., Karcher, D. E., & Rorie, R. L. (2015). System and method of in-season nitrogen measurement and fertilization of non-leguminous crops from digital image analysis. Patents Granted. Retrieved from https://scholarworks.uark.edu/pat/2
Comments
Larry C. Purcell, Department of Crop, Soil and Environmental Sciences, University of Arkansas, Fayetteville, AR
Upton G. Siddons, Department of Crop, Soil and Environmental Sciences, University of Arkansas, Fayetteville, AR
Douglas E. Karcher, Department of Horticulture, University of Arkansas, Fayetteville, AR
Robert L. Rorie, Department of Crop, Soil and Environmental Sciences, University of Arkansas, Fayetteville, AR