UAV based soil salinity assessment of cropland

Konstantin Ivushkin, Harm Bartholomeus, Arnold K. Bregt, Alim Pulatov, Marston H.D. Franceschini, Henk Kramer, Eibertus N. van Loo, Viviana Jaramillo Roman, Richard Finkers

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)

Abstract

Increased soil salinity is a significant agricultural problem that decreases yields for common agricultural crops. Its dynamics require cost and labour effective measurement techniques and widely acknowledged methods are not present yet. We investigated the potential of Unmanned Aerial Vehicle (UAV) remote sensing to measure salt stress in quinoa plants. Three different UAV sensors were used: a WIRIS thermal camera, a Rikola hyperspectral camera and a Riegl VUX-SYS Light Detection and Ranging (LiDAR) scanner. Several vegetation indices, canopy temperature and LiDAR measured plant height were derived from the remote sensing data and their relation with ground measured parameters like salt treatment, stomatal conductance and actual plant height is analysed. The results show that widely used multispectral vegetation indices are not efficient in discriminating between salt affected and control quinoa plants. The hyperspectral Physiological Reflectance Index (PRI) performed best and showed a clear distinction between salt affected and treated plants. This distinction is also visible for LiDAR measured plant height, where salt treated plants were on average 10 cm shorter than control plants. Canopy temperature was significantly affected, though detection of this required an additional step in analysis – Normalised Difference Vegetation Index (NDVI) clustering. This step assured temperature comparison for equally vegetated pixels. Data combination of all three sensors in a Multiple Linear Regression model increased the prediction power and for the whole dataset R2 reached 0.46, with some subgroups reaching an R2 of 0.64. We conclude that UAV borne remote sensing is useful for measuring salt stress in plants and a combination of multiple measurement techniques is advised to increase the accuracy.

Original languageEnglish
Pages (from-to)502-512
Number of pages11
JournalGeoderma
Volume338
Early online date29 Sep 2018
DOIs
Publication statusPublished - 2019

Fingerprint

soil salinity
lidar
salt
salts
remote sensing
Chenopodium quinoa
cameras
sensors (equipment)
salt stress
vegetation index
canopy
temperature
scanners
sensor
cropland
unmanned aerial vehicles
vehicle
reflectance
stomatal conductance
labor

Keywords

  • Hyperspectral
  • LiDAR
  • Quinoa
  • Remote sensing
  • Soil salinity
  • Thermography
  • UAV

Cite this

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title = "UAV based soil salinity assessment of cropland",
abstract = "Increased soil salinity is a significant agricultural problem that decreases yields for common agricultural crops. Its dynamics require cost and labour effective measurement techniques and widely acknowledged methods are not present yet. We investigated the potential of Unmanned Aerial Vehicle (UAV) remote sensing to measure salt stress in quinoa plants. Three different UAV sensors were used: a WIRIS thermal camera, a Rikola hyperspectral camera and a Riegl VUX-SYS Light Detection and Ranging (LiDAR) scanner. Several vegetation indices, canopy temperature and LiDAR measured plant height were derived from the remote sensing data and their relation with ground measured parameters like salt treatment, stomatal conductance and actual plant height is analysed. The results show that widely used multispectral vegetation indices are not efficient in discriminating between salt affected and control quinoa plants. The hyperspectral Physiological Reflectance Index (PRI) performed best and showed a clear distinction between salt affected and treated plants. This distinction is also visible for LiDAR measured plant height, where salt treated plants were on average 10 cm shorter than control plants. Canopy temperature was significantly affected, though detection of this required an additional step in analysis – Normalised Difference Vegetation Index (NDVI) clustering. This step assured temperature comparison for equally vegetated pixels. Data combination of all three sensors in a Multiple Linear Regression model increased the prediction power and for the whole dataset R2 reached 0.46, with some subgroups reaching an R2 of 0.64. We conclude that UAV borne remote sensing is useful for measuring salt stress in plants and a combination of multiple measurement techniques is advised to increase the accuracy.",
keywords = "Hyperspectral, LiDAR, Quinoa, Remote sensing, Soil salinity, Thermography, UAV",
author = "Konstantin Ivushkin and Harm Bartholomeus and Bregt, {Arnold K.} and Alim Pulatov and Franceschini, {Marston H.D.} and Henk Kramer and {van Loo}, {Eibertus N.} and {Jaramillo Roman}, Viviana and Richard Finkers",
year = "2019",
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language = "English",
volume = "338",
pages = "502--512",
journal = "Geoderma",
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publisher = "Elsevier",

}

UAV based soil salinity assessment of cropland. / Ivushkin, Konstantin; Bartholomeus, Harm; Bregt, Arnold K.; Pulatov, Alim; Franceschini, Marston H.D.; Kramer, Henk; van Loo, Eibertus N.; Jaramillo Roman, Viviana; Finkers, Richard.

In: Geoderma, Vol. 338, 2019, p. 502-512.

Research output: Contribution to journalArticleAcademicpeer-review

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T1 - UAV based soil salinity assessment of cropland

AU - Ivushkin, Konstantin

AU - Bartholomeus, Harm

AU - Bregt, Arnold K.

AU - Pulatov, Alim

AU - Franceschini, Marston H.D.

AU - Kramer, Henk

AU - van Loo, Eibertus N.

AU - Jaramillo Roman, Viviana

AU - Finkers, Richard

PY - 2019

Y1 - 2019

N2 - Increased soil salinity is a significant agricultural problem that decreases yields for common agricultural crops. Its dynamics require cost and labour effective measurement techniques and widely acknowledged methods are not present yet. We investigated the potential of Unmanned Aerial Vehicle (UAV) remote sensing to measure salt stress in quinoa plants. Three different UAV sensors were used: a WIRIS thermal camera, a Rikola hyperspectral camera and a Riegl VUX-SYS Light Detection and Ranging (LiDAR) scanner. Several vegetation indices, canopy temperature and LiDAR measured plant height were derived from the remote sensing data and their relation with ground measured parameters like salt treatment, stomatal conductance and actual plant height is analysed. The results show that widely used multispectral vegetation indices are not efficient in discriminating between salt affected and control quinoa plants. The hyperspectral Physiological Reflectance Index (PRI) performed best and showed a clear distinction between salt affected and treated plants. This distinction is also visible for LiDAR measured plant height, where salt treated plants were on average 10 cm shorter than control plants. Canopy temperature was significantly affected, though detection of this required an additional step in analysis – Normalised Difference Vegetation Index (NDVI) clustering. This step assured temperature comparison for equally vegetated pixels. Data combination of all three sensors in a Multiple Linear Regression model increased the prediction power and for the whole dataset R2 reached 0.46, with some subgroups reaching an R2 of 0.64. We conclude that UAV borne remote sensing is useful for measuring salt stress in plants and a combination of multiple measurement techniques is advised to increase the accuracy.

AB - Increased soil salinity is a significant agricultural problem that decreases yields for common agricultural crops. Its dynamics require cost and labour effective measurement techniques and widely acknowledged methods are not present yet. We investigated the potential of Unmanned Aerial Vehicle (UAV) remote sensing to measure salt stress in quinoa plants. Three different UAV sensors were used: a WIRIS thermal camera, a Rikola hyperspectral camera and a Riegl VUX-SYS Light Detection and Ranging (LiDAR) scanner. Several vegetation indices, canopy temperature and LiDAR measured plant height were derived from the remote sensing data and their relation with ground measured parameters like salt treatment, stomatal conductance and actual plant height is analysed. The results show that widely used multispectral vegetation indices are not efficient in discriminating between salt affected and control quinoa plants. The hyperspectral Physiological Reflectance Index (PRI) performed best and showed a clear distinction between salt affected and treated plants. This distinction is also visible for LiDAR measured plant height, where salt treated plants were on average 10 cm shorter than control plants. Canopy temperature was significantly affected, though detection of this required an additional step in analysis – Normalised Difference Vegetation Index (NDVI) clustering. This step assured temperature comparison for equally vegetated pixels. Data combination of all three sensors in a Multiple Linear Regression model increased the prediction power and for the whole dataset R2 reached 0.46, with some subgroups reaching an R2 of 0.64. We conclude that UAV borne remote sensing is useful for measuring salt stress in plants and a combination of multiple measurement techniques is advised to increase the accuracy.

KW - Hyperspectral

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KW - Remote sensing

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KW - Thermography

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DO - 10.1016/j.geoderma.2018.09.046

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JF - Geoderma

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