Treatment implementation andtiming
Supplemental irrigation via a sprinkler system started in November 2009, at 6 MAP. Treatments T0, T1 and T2 were administered thrice, every 10th, 20th and 30th day of the month, at 10mm and 20mm per time for T2 and T3, respectively. Using a drip pan method for fi eld plot sprinkle irrigation, and through several trials and adjustments of the sprinkler mechanism, irrigation at 10 and 20 mm rates was completed in 30 and 60 min, respectively.