Keith Glewen - Extension Educator

Keith Glewen

(faculty)
Work
1071 County Rd G Ithaca NE 68033-2234
US
Work 402-624-8030 On-campus 7-8030

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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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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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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Palmer amaranth
Figure 1. This female Palmer amaranth plant can produce up to 0.5 million seeds.

Watch for Palmer Amaranth in Conservation Reserve Program (CRP) Fields May 12, 2017

Palmer amaranth has not been confirmed in conservation plantings in Nebraska; however, the identification and occurrence of Palmer amaranth in CRP fields in Iowa has raised concerns among weed scientists and growers about its spread into conservation plantings in Nebraska and offer some suggestions for growers.

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Meat thermometer measuring soil temperature

Corn, Soybean Planting Considerations for this Week’s Cold Snap April 24, 2017

With nighttime lows predicted to drop several nights this week, growers are advised to cautiously assess the potential for germination problems due to imbibitional chilling before planting. Agronomists advise checking soil temperatures in each field the day of planting as well as forecast temperatures for 24 hours (soybeans) or 48 hours (corn) after planting.

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Field of soybeans

10 Years of Research Shows Benefit of Reducing Soybean Seeding Rates March 30, 2017

A review of 10 years of soybean research shows that reducing your seeding rate from 150,000 to 120,000 seeds/acre can result in a $10.69/acre savings without affecting yield (assuming a $60/unit seed cost at 140,000 seeds/unit).

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Farmer Jerry Mulliken of Nickerson

Increase Profitability with On-Farm Research March 16, 2017

Jerry Mulliken discusses what he's learned from conducting more than 30 research studies on his farm near Nickerson, Nebraska. On-farm research provides meaningful information specific to a farm's soils, farming practices, and local conditions, allowing growers to make management decisions with confidence. Learn more from a farmer's perspective in this article and video.

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