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Can corn benefit from social distancing?


What causes smaller yields in corn planted after a cereal rye cover crop?
Dr. Alison Robertson, Iowa State University | Apr 05, 2021
Occasionally, corn planted after a cereal rye cover crop may have reduced yields. Proposed reasons for this yield decline include allelopathy, seedling disease, nitrogen immobilization and poor planter performance. In our lab, we are interested in understanding how seedling disease and allelopathy contribute to corn yield decline to develop best management practices for growing corn after a cereal rye cover crop. We will save the allelopathy story for another blog, and focus on seedling disease in this blog.
Corn seedling disease pathogens survive in the roots of cereal rye. We wondered if planting corn at a distance from a cereal rye crop, in other words “social distancing” the two crops, might reduce seedling disease and mitigate yield loss. ....

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ILF virtual field day to cover water quality, quantity in watershed


SmevansEvans/Getty Images
UNIQUE TOPOGRAPHY: “The karst topography in northeast Iowa creates some unique challenges when planning for water detention project sites,” said Matt Frana, Upper Iowa Watershed project coordinator. “Shallow depth to bedrock, easily dissolvable bedrock, highly fractured bedrock, and sinkholes can become problematic if water is pooled above or near them.”
Feb. 4 field day will discuss improving water quality and quantity in the karst topography of northeast Iowa.
Jan 28, 2021
Iowa Learning Farms is hosting a free virtual field day on the challenges of improving water quality and quantity management in the karst topography of the Upper Iowa Watershed at 1 p.m. Feb. 4. ....

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Beaver dams: Nuisance or conservation practice?


Billy Beck, ISU Extension
CHANNEL CHANGES: Everett Johnson, an ISU senior studying animal ecology, stands on the downstream side of an active beaver dam. Note the differences in stream channel width, water surface elevation and water velocities upstream and downstream of the structure.
Conservation Learning Group: Beaver dams can potentially improve water quality and reduce stream bank erosion.
Hilary Pierce | Jan 20, 2021
The beaver is often thought of as an industrious construction expert with instinctive engineering skills that creates dams capable of holding back the flow of water in Iowa’s creeks and streams.
For some, this skill is not as welcome as you may think. When a beaver’s dam backs water into a row crop field during a weather event or wet season, farmers are not their biggest fans. In addition, beavers have a voracious appetite for almost anything that grows, including corn. The combined nuisance of crop pilferage an ....

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Miscanthus Value for Iowa Farmers Highlighted in an Upcoming Thursday Seminar


AJ TaylorJanuary 12, 2021Last Updated: February 28, 2021
Iowa Learning Farms, in partnership with the Iowa Nutrient Research Center and Conservation Learning Group, is hosting a free wetland virtual field day on growing miscanthus in Iowa on Thursday, Jan. 14 at 1 p.m.
Join for a live conversation with Emily Heaton, Iowa State University agronomy professor and extension biomass crop specialist.
Miscanthus has received widespread attention as a biomass crop for bioenergy in Europe, while bedding and bioproduct markets are developing faster than energy markets in the U.S.
Heaton’s team is exploring what it takes to successfully grow miscanthus in Iowa and measuring the impact on soil health and water quality. The team is also exploring converting areas of fields that produce low corn and soybean yields to miscanthus for improved long-term profitability. ....

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