Heat map represents the average normalized response of common hard spring wheat varieties to terminal drought and nitrogen (N) stress in trials conducted in Yolo and Fresno Counties of California during the 2016-2017 and 2017-2018 seasons. Terminal drought and N stress responses are based on averages of 3 and 4 site-years of data, respectively. Stress trials are managed identically except for the exclusion of irrigation after the vegetative growth period (terminal drought) or the exclusion of N fertilizer additions throughout the season (N stress).
Site-year summary figures:
How are these results calculated?