Abstract
Vegetation indices (VI) derived from a new generation of high-spatial resolution satellites, namely Planet and Sentinel-2, were tested as proxies for stem water potential (Ψ-stem) in commercial vineyards. Multivariable linear regression models were developed from the Planet and Sentinel-2 data and in-situ Ψ-stem measurements in 82 vineyards in Israel, providing Ψ-stem estimates every 1-2 weeks. With multivariable regression VIs in the VIS-NIR region (Planet) and moisture VIs in the NIR-SWIR region (Sentinel-2) were correlated with in-situ Ψ-stem measurements. In general, Sentinel-based models performed better (higher correlations and higher ability to capture temporal and spatial variability) than Planet-based models. The trade-off between spectral, spatial and temporal resolutions of these two satellites are further discussed.
| Original language | English |
|---|---|
| Title of host publication | Precision Agriculture 2019 - Papers Presented at the 12th European Conference on Precision Agriculture, ECPA 2019 |
| Editors | John V. Stafford |
| Publisher | Wageningen Academic Publishers |
| Pages | 445-451 |
| Number of pages | 7 |
| ISBN (Electronic) | 9789086863372 |
| DOIs | |
| State | Published - 2019 |
| Event | 12th European Conference on Precision Agriculture, ECPA 2019 - Montpellier, France Duration: 8 Jul 2019 → 11 Jul 2019 |
Publication series
| Name | Precision Agriculture 2019 - Papers Presented at the 12th European Conference on Precision Agriculture, ECPA 2019 |
|---|
Conference
| Conference | 12th European Conference on Precision Agriculture, ECPA 2019 |
|---|---|
| Country/Territory | France |
| City | Montpellier |
| Period | 8/07/19 → 11/07/19 |
Bibliographical note
Publisher Copyright:© Wageningen Academic Publishers 2019
Funding
This research was supported by the Fund of the Chief Scientist of the Ministry of Agriculture in Israel (Grant No. 20-12-0030). We thank the Israeli wineries Barken, Golan Heights and Carmel for sharing their data with us.
| Funders | Funder number |
|---|---|
| Israeli wineries Barken | |
| Ministry of Agriculture in Israel | 20-12-0030 |
Keywords
- Google earth engine
- Planet-labs
- Sentinel-2
- Stem water potential