Due to an oversight by the authors, in the upper graph in Figure 4 [1] only the determination coefficients for Morocco are correct. Those for the other three countries are wrong. The authors wish to correct this mistake (see the following Figure 4).
Figure 4.
NDVI/yield linear regressions for cereals in North Africa (from Maselli and Rembold [46]; modified). (Top) Evolution of the coefficient of determination (R2) between radiometric variable and yield over time. (Bottom) Scatter plots between NDVI and cereal yield. Each dot corresponds to the annual yield for agricultural areas at national level and to the monthly NDVI best correlated to yield.
The authors apologize for the inconvenience.
Reference
- Rembold, F.; Atzberger, C.; Savin, I.; Rojas, O. Using low resolution satellite imagery for yield prediction and yield anomaly detection. Remote Sens 2013, 5, 1704–1733. [Google Scholar]
© 2013 by the authors; licensee MDPI, Basel, Switzerland This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license ( http://creativecommons.org/licenses/by/3.0/).