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Journal of Applied Remote Sensing

High-biomass sorghum yield estimate with aerial imagery
Author(s): Ruixiu Sui; Brandon E. Hartley; John M. Gibson; Chenghai Yang; J. Alex Thomasson; Stephen W. Searcy
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Paper Abstract

To reach the goals laid out by the U.S. Government for displacing fossil fuels with biofuels, high-biomass sorghum is well-suited to achieving this goal because it requires less water per unit dry biomass and can produce very high biomass yields. In order to make biofuels economically competitive with fossil fuels it is essential to maximize production efficiency throughout the system. The goal of this study was to use remote sensing technologies to optimize the yield and harvest logistics of high-biomass sorghum with respect to production costs based on spatial variability within and among fields. Specific objectives were to compare yield to aerial multispectral imagery and develop predictive relationships. A 19.2-ha high-biomass sorghum field was selected as a study site and aerial multispectral images were acquired with a four-camera imaging system on July 17, 2009. Sorghum plant samples were collected at predetermined geographic coordinates to determine biomass yield. Aerial images were processed to find relationships between image reflectance and yield of the biomass sorghum. Results showed that sorghum biomass yield in early August was closely related (R2 = 0.76) to spectral reflectance. However, in the late season the correlations between the biomass yield and spectral reflectance were not as positive as in the early season. The eventual outcome of this work could lead to predicted-yield maps based on remotely sensed images, which could be used in developing field management practices to optimize yield and harvest logistics.

Paper Details

Date Published: 1 January 2011
PDF: 10 pages
J. Appl. Remote Sens. 5(1) 053523 doi: 10.1117/1.3586795
Published in: Journal of Applied Remote Sensing Volume 5, Issue 1
Show Author Affiliations
Ruixiu Sui, Mississippi State Univ. (United States)
Brandon E. Hartley, Texas A&M Univ. (United States)
John M. Gibson, Texas A&M Univ. (United States)
Chenghai Yang, Agricultural Research Service (United States)
J. Alex Thomasson, Texas A&M Univ. (United States)
Stephen W. Searcy, Texas A&M Univ. (United States)


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