Katja Koehler-Cole - Research Assistant Professor in Agronomy and Horticulture

Katja Koehler-Cole

student, faculty
Graduate Student
Post-Baccalaureate
Work Plant Sciences Hall (PLSH) 386
Lincoln NE 68583-0915
US
Work 402-472-2811 On campus, dial 2-2811

Dr. Koehler-Cole was promoted to assistant research professor in the Department of Agronomy and Horticulture Dec. 1, 2018. You can find the article she wrote as a Post-Doctoral Research Associate here.

Sunflower and turnip field

Plants for Fallow Summer Periods

September 1, 2021
Many warm-season cover crop species are available and can be used for different purposes in fallow fields, such as improving soil health, breaking up soil compaction, providing forage and supporting beneficial insects.

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Cover crop plantings

Cover Crop Termination Tradeoffs

April 8, 2021
Termination timing of cereal covers can be tricky — while there may not be one "right answer," there are many factors you can consider to make the best decision for your operation. 

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cover crops in a field

Seeding Rates for Broadcasting Cover Crops Into Late-season Corn and Soybean

September 17, 2020
The middle to end of September is a good time to establish cover crops by broadcasting seeds into corn or soybean before harvest. Broadcast interseeding before harvest allows cover crops to capture more sunshine, growing degree days and rainfall than drilling after harvest.

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Rye in continuous corn
Rye in continuous corn April 19, 2018 at the Eastern Nebraska Research and Education Center near Mead.

How Much Nitrogen Does My Cover Crop Take Up and When Do I Get It Back?

August 27, 2020
Biomass production, N uptake, and C:N ratio vary widely across the United States. The N in cover crop biomass will be released within a few weeks after termination, however, decomposition varies with soil moisture, soil temperature and C:N ratios.

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single crop and mixed cover crops in field

What Are the Benefits of a Cover Crop Mix Versus a Single Species Cover Crop?

July 6, 2020
The decision whether to mix species or plant a single species as a cover crop depends on your goals, time of the year, and costs.

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Corn Green Cereal Rye
Corn planted into green cereal rye in 2020.

Considerations when Planting Green

April 24, 2020
Growers that switched to planting green, say it was much easier to plant compared with planting into the decomposing-dying cover. In spite of these observations, planting green is not for everyone and one needs to assess the risk of doing so.

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Cover crop research plots in 2017

Spring-planted Cover Crops for Weed Control in Organic Soybean

March 25, 2020
Weed control in organic soybean usually includes frequent pre-plant tillage operations but spring rains often make it difficult to get into the fields for timely tillage. As a result, weed pressure can be high. Cover crops can help suppress weeds, but after corn harvest it is often too late to establish cover crops. Spring-planting cover crops may be an alternative to fall-planting.

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red clover sown in wheat field

Undersowing Red Clover Into Winter Wheat as an N Source for Corn

March 11, 2020
Red clover can be an excellent green manure that fixes nitrogen, suppresses weeds, and increases corn yields. As a slow-growing cool-season legume, it is suitable to undersowing into winter small grains in early spring.

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