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Journal of Applied Remote Sensing • Open Access

Estimating plant area index for monitoring crop growth dynamics using Landsat-8 and RapidEye images
Author(s): Jiali Shang; Jiangui Liu; Ted C. Huffman; Budong Qian; Elizabeth Pattey; Jinfei Wang; Ting Zhao; Xiaoyuan Geng; David Kroetsch; Taifeng Dong; Nicholas Lantz

Paper Abstract

This study investigates the use of two different optical sensors, the multispectral imager (MSI) onboard the RapidEye satellites and the operational land imager (OLI) onboard the Landsat-8 for mapping within-field variability of crop growth conditions and tracking the seasonal growth dynamics. The study was carried out in southern Ontario, Canada, during the 2013 growing season for three annual crops, corn, soybeans, and winter wheat. Plant area index (PAI) was measured at different growth stages using digital hemispherical photography at two corn fields, two winter wheat fields, and two soybean fields. Comparison between several conventional vegetation indices derived from concurrently acquired image data by the two sensors showed a good agreement. The two-band enhanced vegetation index (EVI2) and the normalized difference vegetation index (NDVI) were derived from the surface reflectance of the two sensors. The study showed that EVI2 was more resistant to saturation at high biomass range than NDVI. A linear relationship could be used for crop green effective PAI estimation from EVI2, with a coefficient of determination (R2) of 0.85 and root-mean-square error of 0.53. The estimated multitemporal product of green PAI was found to be able to capture the seasonal dynamics of the three crops.

Paper Details

Date Published: 12 November 2014
PDF: 12 pages
J. Appl. Rem. Sens. 8(1) 085196 doi: 10.1117/1.JRS.8.085196
Published in: Journal of Applied Remote Sensing Volume 8, Issue 1
Show Author Affiliations
Jiali Shang, Agriculture and Agri-Food Canada (Canada)
Jiangui Liu, Agriculture and Agri-Food Canada (Canada)
Ted C. Huffman, Agriculture and Agri-Food Canada (Canada)
Budong Qian, Agriculture and Agri-Food Canada (Canada)
Elizabeth Pattey, Agriculture and Agri-Food Canada (Canada)
Jinfei Wang, Western Univ. (Canada)
Ting Zhao, Agriculture and Agri-Food Canada (Canada)
Xiaoyuan Geng, Agriculture and Agri-Food Canada (Canada)
David Kroetsch, Agriculture and Agri-Food Canada (Canada)
Taifeng Dong, Agriculture and Agri-Food Canada (Canada)
Nicholas Lantz, Agriculture and Agri-Food Canada (Canada)

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