South-Central/Southeast ND (07/15/21)
According to NDAWN, the region’s April 1 to July 12 rainfall ranges from 3.3 inches (Dazey) to 10.6 inches (Jamestown), with the Carrington REC at 3.8 inches. July 1-12 rain total ranges from 2 inches (McHenry) to less than 0.25 inch generally along Hwy 281 from Carrington to Ellendale. During the past week (July 6-12), daily water use by row crops averaged about 0.2 inch per day.
Winter rye is mature and the majority of spring-seeded small grain are in the dough stages with plants losing color. The normal three-week seed fill period has been reduced due to continuing inadequate soil moisture and high air temperatures. In summary, our adverse growing season has greatly reduced the number of small grain heads per acre, number of seeds per head and seed weight – all contributing to very disappointing grain yield.
Corn, soybean, dry bean and sunflower are entering growth stages where seed yield will be dramatically reduced if adverse weather continues. Corn is near or at tasseling (VT). Drought and heat stress at VT can reduce yield an average of 3% per day and yield reduction at least doubles with stress during silking (R1). Soybean growth stages range from full flower (R2) to early pod development (R3-4). The approximate month period of R3 (pods at least 0.25 inch in length at one of the upper 4 plant nodes) through R6 (seeds have filled pods within upper 4 plant nodes) is the most critical to have minimal plant stress.
Upcoming crop tours planned by the Carrington REC:
*Field Day: July 20; Agronomy tours at 9:30 a.m. and 1:15 p.m.
*Row Crop: August 25; afternoon
Extension Cropping Systems Specialist
NDSU Carrington Research Extension Center