By Kent Thiesse
Warmer temperatures in late June and early July have helped improve crop conditions in some areas of the Midwest. Earlier planted corn has made up some lost ground as far as crop development, while later planted corn and soybeans have experienced very rapid growth.
Many areas of southern and western Minnesota, however, along with adjoining areas of Iowa and South Dakota have been impacted by severe storms and excessive rainfall and occasional hail in recent weeks. This has caused considerable drown-out areas and crop damage in some fields. Conditions remain quite variable across the region.
Those normal to slightly above normal temperatures menat rapid development of corn and soybeans in many areas of the Upper Midwest. As of July 3, the accumulated growing degree units at the University of Minnesota Research and Outreach Center at Waseca since May 1 was at 881.5 GDU’s, which is still approximately 10 percent below normal. However, this is a big improvement from early-June, when it was 23 percent below normal. GDU accumulation in 2019 is still well below the 2018 level, when 1143.5 GDU’s had been accumulated by July 3.
Continued heavy rainfall in late June and early July across southern and western Minnesota have hampered crop development and caused additional crop loss. Most of the affected region received 100 to 150 percent or more of their normal precipitation amounts since May 1, with heaviest rainfall events coming since mid-June.
For the year, many areas have now received 20 to 30 inches of precipitation during 2019, with portions of Southeast and Western Minnesota getting 5 to 10 inches of rain since June 25. In some areas of southwest Minnesota and eastern South Dakota, farm operators did not complete their 2019 corn and soybean planting until late June. There is a considerable amount of prevented planted acres in many locations across the region.
A major concern now developing from these negative factors is the loss or lack of nitrogen for growing corn. Soil nitrogen losses increase substantially during heavy rainfall events early in the growing season. In some cases, farmers planned to side dress the nitrogen after planting, but have been unable to do so due to the continual saturated field conditions. Farmers may need to evaluate the condition of the corn crop before deciding how much to invest in supplemental nitrogen applications.
Another concern with the persistent wet field conditions is timely herbicide applications for weed control. Producers that were relying totally on post-emergence herbicides have had difficulty getting these products applied in a timely fashion. The window for dicamba herbicide in soybeans has passed, as well as for some other post-emergence herbicides used in corn and soybeans. Producers should contact their agronomist or crop consultant regarding further considerations for late season post-emergence herbicide options for this year’s crop.
The weekly USDA Crop Condition Report on July 1 listed 58 percent of Minnesota’s corn crop and 62 percent of the soybeans as “good to excellent.” This has been fairly steady since mid-June. By comparison, the “good to excellent” crop ratings in Minnesota at this time in 2018 were 84 percent for corn and 79 percent for soybeans.
Confusing USDA Acreage Reports
The 2019 acreage reports that were released by USDA in June were quite confusing. The USDA World Agricultural Supply and Demand Estimates Report released on June 11 lowered the expected planted corn acres in the U.S by 3 million acres from a month prior, with the 2019 planted corn acres now estimated at 89.8 million acres. However, the USDA National Agriculture Statistics Service Crop Acreage Report, which was released on June 28, showed a decline of only 1.1 million acres from the intended planted acres in March, with 91.7 million planted acres of corn listed for 2019. The NASS corn acreage number exceeded the estimates of grain traders by 5 million acres and was 2 million acres above even the highest estimate.
How does one explain the vast difference in the planted corn acreage by different USDA agencies ? One explanation is the difference in how the corn acreage data is collected. The NASS data is based on farmer surveys, which were conducted during the first half of June and could have changed by late June. It is also not known how farmers considered prevented planted corn acres in their estimates. The WASDE reports are released in the middle of each month, with planted crop acreage estimates and other data compiled by USDA economists, based on their analysis of existing crop conditions.
USDA will re-survey farmers in 14 States, including Minnesota, in July to update the corn and soybean planting data for 2019, with the updated NASS acreage report to be released in early August. The June 28 NASS acreage report lowered the intended 2019 U.S. soybean acres by about 4.5 million acres from the March estimate.
In total, the planted U.S. corn and soybean acreage in June declined by nearly 5.7 million acres from the original acreage estimate in March. This probably reflects the 2019 prevented planted acres, though many experts feel that number could end up a lot higher.
The next WASDE Report will be released on July 11, with many grain traders watching to see if there are any further adjustments in 2019 corn acreage. The June WASDE Report also lowered the expected 2019 U.S. average corn yield to 166 bushels per acre, which was a decline of 10 bushels per acre from the May estimate. Grain traders will also be watching this number very closely. The crop reporting deadline for farmers at local Farm Service Agency (FSA) offices is July 15, which may provide another indication of 2019 planted crop acres, as well as the amount of prevented planted acres. Most likely, we will not have certainty on the 2019 crop acres until after the corn and soybean harvest is completed this Fall.
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