ISSUE 13 July 27, 2006
During the past week (July 19-25), rainfall recorded at NDAWN sites in the region ranged from 0.24 inches at Harvey to 1.35 inches at Robinson. Based on NDAWN estimates, the regionís average daily water use on July 25 ranged from about 0.2 to 0.35 inches for corn, dry bean, soybean and sunflower. Although cooler night temperatures, subsoil moisture, and isolated rainfall are allowing late-season crops to tolerate the adverse environment, we need an inch of rain this last week of July and the next several weeks for acceptable yield.
Limited harvest reports indicate winter wheat yields ranging from 40 to 90 bushels/acre with good test weight and protein. Harvest of the regionís barley and field pea continues, spring wheat harvest is underway in southern counties, and canola is being swathed in northern counties. Most of the regionís corn is in the silking to early-blister stages and likely is the late-season crop most adversely affected by our continued high stress conditions. Soybeans are in the pod to early-seed development stages (R3-R5 stages). Reports of soybean fields being treated for aphid are common. Farmers need to continue monitoring their soybean fields for aphids and spider mites, while considering the reduced yield potential from environmental stress and advancing stage of the crop. We need at least an inch of rain this last week of July to keep our hopes for an average yield of soybean and dry bean. Sunflowers are at or near the flowering stage and currently appear to be the best late-season crop at tolerating our adverse growing conditions.
Area Extension Specialist/Cropping Systems
NDSU Carrington Research Extension Center