Nitrogen fertilizer application can help wheat growers increase crop value and marketability by increasing grain quality. Nitrogen (N) is often applied at heading as a method of increasing protein content and therefore quality of wheat. Our objectives were to obtain spectral signatures of wheat under various N rates (0, 72, 180, 234 kg N ha-1), test various spectral methods of identifying crop stress, and observe the grain protein response to a midseason N application. Spectral data from satellite and aerial platforms were compared to preseason N treatments and flag-leaf tissue samples. Spectral data correlated well with preseason and flag leaf tissue analysis (r2 = 0.58-0.82). Grain protein increased on plots that received an additional 54 kg of N ha-1 at anthesis almost 2% in the N stressed plots (72 kg N ha-1) and 0.3-0.4% on plots with sufficient N (234 and 180 kg N ha-1). Wheat stress detected and managed with help from satellite and aerial platforms could help growers increase revenue and decrease N over-application.
Wright, Dennis L. Jr.; Ritchie, Glen; Rasmussen, V. Philip; Ramsey, R. Douglas; and Baker, Doran
"Managing Protein in Spring Wheat with Aerial and Satellite Imagery,"
Online Journal of Space Communication: Vol. 2
, Article 21.
Available at: https://ohioopen.library.ohio.edu/spacejournal/vol2/iss3/21
Astrodynamics Commons, Navigation, Guidance, Control and Dynamics Commons, Space Vehicles Commons, Systems and Communications Commons, Systems Engineering and Multidisciplinary Design Optimization Commons