Distinguishing Growth Stages of Wheat Crop by Remote Sensing Techniques and Time Series Analysis

Document Type : Original Research

Authors

1 Biosystems Engineering Dept. Shahid Bahonar University of Kerman

2 Biosystem Engineering, Shahid Bahonar University of Kerman, Kerman, Iran

3 Agricultural Engineering Research Department, Fars Agricultural and Natural Resource Research and Education Center, AREEO, Shiraz, Iran

4 Dept of Plant production and Genetics, Shiraz University

Abstract

Remote sensing has attracted the attentions by providing a broad and comprehensive view of the world. The use of remote sensing in various fields such as agriculture is constantly expanding. Spectral bands in visible and infrared ranges can be used to discriminate between phenomena and ground cover by computing various spectral indices. Investigating plant physiology is essential to know the physiological and ecological aspects of plant functions. In this study, images of Sentinel-2 satellite were used to compute spectral indices and correlate them with phenological stages of wheat crop in two agricultural centers in Fars province, Iran. Zadoks scale is one of the most reputed methods to state growth stages of wheat crop. The Zadoks scale uses two-digit codes to demonstrate different phenological processes. In this study, nine growing stages were carefully identified using ground truth method. After calculating two spectral indices of normalized difference vegetation index (NDVI) and soil adjusted vegetation index (SAVI) on satellite images of various dates during the growing season, NDVI and SAVI time series were generated. Each time series image consisted of nine bands, each band being an image obtained from a wheat growing stage. Study the trend between NDVI and SAVI indices and the Zadoks scale showed that the phenological stages of wheat can be identified using remote sensing technology.

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References

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Biomechanism and Bioenergy Research
Volume 1, Issue 1
June 2022
Pages 16-22

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History

  • Receive Date: 11 February 2022
  • Revise Date: 20 March 2022
  • Accept Date: 21 March 2022

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