All plots received at least 1.5cm/week of water in April, May and October and 2.5 cm/week in June through September. If the plots received this water from natural rainfall, then no supplemental watering was needed. When watering was needed, it was done using a system of hoses set up in the field. A black irrigation pipe, 3 inches in diameter, was hooked up to the pump. This extended out to the E026 area where the 3-inch hose was divided into two 2-inch hoses. One part went toward the E026 (and E071) plots (the other toward E055, E069, E070). From this hose, several regular garden hoses were connected. Gardena Excellent Oscillating Sprinklers, model 6968, were attached to these hoses. These sprinklers were purchased at Sears and made at Gardena, Inc., 6031 Culligan Way, Minnetonka, MN 55345. Three or four hoses/sprinklers were used at one time. Any more than this reduced the water pressure enough so the sprinklers would not work. The sprinklers were rotated in order to reach all of the plots.