Jenny Rees - Extension Educator

Jenny Rees

faculty
Work
2345 Nebraska Ave York NE 68467-1104
US

Twitter: @jenreesources
Blog: JenReesources Extension Blog

Fall Armyworm

Fall Armyworms in Pastures, Alfalfa, Small Grains, Cover Crops, and Lawns

September 24, 2021
We continue to receive questions on management with the unprecedented number of fall armyworms experienced in Nebraska this fall. The following is a Q/A to address the specific questions we’ve received.

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2021 corn yield forecast for midwestern states

2021 Corn Yield Forecasts: End-of-season Forecasts Suggest Near to Below-average Yields for the Region

September 16, 2021
In line with our previous reports, our forecasted yield potential this season seems to be 10% below the historical average.

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Soybean pods
Figure 1. Soybean pods collected from stage R7 plants (one mature pod per plant) that were opened to determine if the pod wall interior membrane was still clinging tightly to the seeds (leftmost pod), or if it was beginning to detach from the seeds (second pod), or if the membrane was now permanently attached to the pod wall (third pod). After attaining physiological maturity, seeds undergo a dry-down period from about 60% moisture to about 13% moisture. Note that the Rx.x numbers used here are pod-based stages, not plant-based stages.

Understanding Ending Reproductive Stages in Soybean

August 27, 2021
The timing of the ending R stages in soybean is governed by planting date (PD) and varietal maturity group (MG), though the date of R7 can be hastened if water stress and high temperatures prevail in August — something we are seeing in portions of Nebraska this year.

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Corn yield forecast map

2021 Corn Yield Forecasts as of Aug. 25

August 25, 2021
In line with previous forecasts in mid-July and early August, there is no indication that this is going to be a record — and not even an above average — year for national corn yield.

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2021 corn yield potential map

2021 Corn Yield Forecasts as of Aug. 4

August 4, 2021
Below-average rainfall has increased the probability of low yield for rainfed sites in western and northern parts of the Corn Belt and central Iowa.

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Probability of 2021 yield potential map

2021 Corn Yield Forecasts as of July 14

July 14, 2021
Although it is still too early to make strong inferences about end-of-season yields for irrigated corn, there is a relatively high probability for near-average yields for a majority of sites.

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Yield forecast network of sites across the upper midwest

2021 Corn Yield Forecasts: Approach and Interpretation of Results

June 30, 2021
The Yield Forecasting Center (YFC) will provide real-time information on corn phenology and forecasts of corn yield potential every three weeks, starting in mid-July, to aid growers and ag industry in making management, logistics and marketing decisions through the 2021 season.

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Hail damaged corn
Corn around V10-11 with leaves stripped due to hail damage. In this case, much of the corn will recover and look better in 10-14 days. Watch stalk bruising to see if stalk rot sets in. There are fields with hail damage at lower stalks with weakened plants that easily break. Soybeans at R1 (beginning flowering) reduced to sticks north of Stromsburg and in Hordville area. Soybeans with damage like this at the R1 stage can have the greatest yield loss in spite of seeing new buds regrowing with the warm weather. Another concern will be weed control going forward. (Photos by Jenny Rees)

Mid-Season Hail Damage Assessments in Corn and Soybeans

June 25, 2021
When severe storms and hail hit your corn and soybean fields, it's important to estimate yield losses to determine the need for future inputs and alternative management strategies. This guide offers steps to evaluate mid-season hail damage and estimate potential yield losses.

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