3. Results
3.1. Rainfall characterization at the experimental site
The annual and growing season precipitation was highest in
2007, and lowest in 2009, with a difference of 126 mm and 100 mm
between the two extremes, respectively (Table 1). For 2008 and
2009, the difference between their annual and growing season precipitation
was 55 mm and 6 mm, respectively. About 50% of the
annual precipitation occurred during June to August. Of the total
annual precipitation, events with