Roger Elmore - Extension Cropping Systems Agronomist

Roger Elmore

(faculty)
Work KEIM 165
Lincoln NE 68583-0915
US
Work 402-472-1451 On-campus 2-1451

Faculty Bio

Maps showing likelihood of yield deviations for rainfed corn at various sites.

2017 Corn Yield Forecasts as of Aug. 9 August 11, 2017

Corn yield forecasts for Nebraska sites indicate near-average to above average yields for most irrigated sites. There was much more yield variability for rainfed locations where three of the sites were forecast with a 50%-100% chance of below-normal yields and three were forecast for normal yields, while one was near average.

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NWS-Omaha map showing areas of below normal temperatures

Scout Corn Fields for Kernel Set August 4, 2017

Considering the day to day and week to week variability in weather we’ve experienced and the wide range of regional conditions across Nebraska this year, scouting fields for kernel set and overall condition may be more important than ever. Check out these corn reports from across the state.

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Probability of yield deviation for normal for irrigated corn, model ran July 18, 2017

2017 Corn Yield Forecasts as of July 18 July 19, 2017

Corn growth stages are estimated for 41 sites in 10 states and yields are estimated for select irrigated and rainfed sites, based on the Hybrid-Maize model and input from specialists and educators across a 10-state area as of July 18, 2017. The authors note that these early season yield forecasts vary widely, particularly for rainfed fields, and may change considerably by end of season.

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Locations of 2017 Yield Forecasting Center sites

2017 Corn Yield Forecasts: Approach and Interpretation of Results July 6, 2017

This article discusses data and data collection for the Yield Forecasting Center forecasts of crop phenology and yield for 2017, including a map of the site locations and specific data on crop management and soil types for each site.

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How Fast Do Corn Roots Grow? ISU is Taking a Look June 22, 2017

Have you ever wondered how fast corn roots grow? Colleagues at Iowa State University have a number: more than 2 ¾ inches per leaf stage. That's about one inch per day!  Soil cores were taken in the row and in the center between two rows. They used the cores to identify the presence of roots (depth and lateral growth).

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Nebraska precipitation map

When Weather Delays Planting – Now What? May 26, 2017

Agronomists consider several options for those pushed into late planting due to heavy rains. Changing corn hybrids or soybean varieties is not recommended, nor is shifting to alternate crops.

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Chart of Nebraska & US corn yield trends (1971-2016)

Soybean and Corn Yield and Acreage Trends through 2016 May 25, 2017

Nebraska soybean and corn yields steadily increased from 1971 to 2016, in both irrigated and rainfed production fields. Charts based on USDA National Agricultural Statistics Service numbers track these changes.

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Yellow seedling corn
Figure 1. "Yellow" corn can sometimes develop in cool, wet springs when corn outgrows its initial energy source - the seed - before its roots reach needed nutrients. (Photo by Troy Ingram)

Yellow Corn Seedlings … A Transition Phase Between Heterotrophic And Autotrophic Growth? May 25, 2017

Widespread yellowish corn seedlings this spring may be due to the slightly sun- and heat-starved seedlings running out of the seed’s stored energy before the main nodal roots take over. A little sun and heat should green them up without affecting yield.

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