Roger Elmore - Extension Cropping Systems Agronomist

Roger Elmore

Faculty Bio

Graph showing irrigated corn yield departure from Trend-Line Yields and Corn Planting Progress by April 29 for 1985-2018 (excluding 1993 data) in Nebraska. From USDA-NASS survey data.

Windows of Opportunity for Corn Planting: Nebraska Data

April 24, 2019
Does early planting of corn necessarily result in higher yields? An examination of Nebraska research and data from USDA NASS sheds light on the question, indicating that, up to mid-May, other factors may affect final yield more than planting date.

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Graph of multiple Corn Belt studies looking at the optimum corn planting window

Windows of Opportunity for Corn Planting: Data from Across the Corn Belt

April 24, 2019
A survey of published research on corn planting dates in the central northern Corn Belt indicates there is a window from mid-April to mid-May when optimum yields can be achieved.

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Planter ready to enter the field.

Corn and Soybean Planting Considerations

April 24, 2019
Planting sets the stage for a successful crop with an even emergence and stand. Consider these tips to help ensure you're providing favorable planting condition via proper soil conditions, planting window, planting depth, and seeding rates.

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Figure 1. Corn height and stalk diameter for the different treatments were measured weekly and compared.

Effect of Rye or Oat Cover Crop on Corn Growth and Development in a Rain-Fed, Wheat-Corn Rotation

March 12, 2019
Cover crop species and planting date are two factors that could affect the following crop. In this student study the effects on corn of cover crop species and planting dates were evaluated.

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Rye cover crop

Soil Microbial Communities under Cover Crops

March 12, 2019
This study examined impacts of using a cereal rye cover crop in corn systems in eastern Nebraska and found that it boosted the microbial community in the upper two inches of the soil. This may improve soil aggregation, nutrient cycling, and other soil health benefits.

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Graph showing the effects of four planting dates and two hybrids on plate internode length.

Planting Date Impact on Corn Growth and Ear Issues

March 12, 2019
Do delayed planting dates affect plant growth (leaf height, stem diameter, and internode length) and ear formation issues in corn? See what this student researcher learned from trials conducted near Clay Center in summer 2018.

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Graphic for the UNL CropWatch Podcast

CW Podcast: Corn Planting and Early Growth Stages

February 22, 2019
This month's Nebraska CropWatch podcast looks at early season management factors to achieve a uniform corn stand, from hybrid selection to planting, and reviews what to expect with early season plant stages.

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Soybeans with purple seed stain (left) and soybeans showing signs of seed decay due to Phomopsis disease complex. (Photo by Jenny Rees)
Figure 1. Soybeans with purple seed stain (left) and soybeans showing signs of seed decay due to Phomopsis disease complex. (Photo by Jenny Rees)

Soybean Seed Germination Concerns

February 13, 2019
Average germination rates of new crop soybean being tested by the Nebraska Crop Improvement Association are lower than in recent years. Growers are urged to check the germination rate for their soybean seed and adjust planting rate and use of fungicide treatments accordingly.

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