| Full text | |
| Author(s): |
Werneck Orlando, Vinicius Silva
;
Martins, George Deroco
;
Fraga Junior, Eusimio Felisbino
;
Marra, Aline Barroca
;
Pereira, Fernando Vasconcelos
;
Trindade Galo, Maria de Lourdes Bueno
Total Authors: 6
|
| Document type: | Journal article |
| Source: | GEOSPATIAL WEEK 2023, VOL. 10-1; v. N/A, p. 6-pg., 2023-01-01. |
| Abstract | |
Leaf Water Potential (LWP) is an indicator widely used to understand water relations in a coffee tree. Monitoring water potential is a challenge for remote sensing using low-cost multispectral cameras, with images taken by remotely piloted aircraft. The objective of this work was to evaluate the potential of a low-cost camera to discriminate different water treatments in the coffee tree. In addition, the accuracy of models to estimate LWP in the coffee crop was evaluated. The results showed that the NDVI (Normalized Difference Vegetation Index) vegetation index was able to discriminate 61.6 % more plots in a drought regime than the Near-InfraRed (NIR) band in the rainfall regime. For LWP, the architecture that presented the best performance in the detection of water stress was for the first flight (SMOreg algorithm using as predictor variables all bands, Red, Green, and NIR, and the NDVI vegetation index) with RMSE value of 0.1880 and RMSE% of 34.18. For the second flight (Random Tree algorithm, using as predictor variables all bands and NDVI) with RMSE (0.0520) and RMSE% (32.00) values. (AU) | |
| FAPESP's process: | 21/06029-7 - High resolution remote sensing for digital agriculture |
| Grantee: | Antonio Maria Garcia Tommaselli |
| Support Opportunities: | Research Projects - Thematic Grants |