3)The methodology of regional trials A Selection of the locations: representative locations B. The Check(reference) variety C Experimental design: Randomized complete block design D Statistics(Yield increase %; Stability and Stability indices) 2. Production trial Production trial. i.e. Farmer land trial 9. arge plot comparison(totally over I mu/variety); 1-2(3) The methodology of regional trials A. Selection of the locations: representative locations B. The Check (reference) variety C. Experimental design: Randomized complete block design D. Statistics (Yield increase %; Stability and Stability indices) 2. Production Trial Production trial, i.e. Farmer land trial Large plot comparison (totally over 1 mu/variety); 1-2 rep’s