Figure 4.10: Comparison between spring wheat yield anomalies (e.g., departures from the trend) and growing season Standardized Precipitation Evapotranspiration Index (SPEI) for the Swift Current Creek Watershed in Saskatchewan.

Comparison between spring wheat yield anomalies (e.g., departures from the trend) and growing season Standardized Precipitation Evapotranspiration Index (SPEI) for the Swift Current Creek Watershed in Saskatchewan.

Source

Wittrock et al., 2014.