Blog

Sotirios Archontoulis
April 22, 2021 3:03 PM

The optimum rate of Nitrogen fertilizer application on corn varies from year to year and from field to field. Here we provide simulation data to aid decision making.

We simulated 25,000 fields across the U.S. Corn Belt from 1984 to 2021 using the Agricultural Production Systems sIMulator...

Crop Production

Sotirios Archontoulis
April 22, 2021 2:42 PM

Mark Licht
April 22, 2021 2:42 PM

The concern for not having enough water during the 2021 growing season is increasing. Observations from Iowa fields (i.e., deep soil samples and tile drainage experiments), and analytical frameworks (i.e., Drought monitor) indicate below normal moisture in parts of Iowa. Here, we benchmark the...

Crop Production

Paul Kassel
April 21, 2021 10:10 PM

Subsoil moisture levels have improved for 2021 crop production.

Iowa State University has completed their spring survey of subsoil moisture in northwest Iowa, says Paul Kassel, ISU Extension and Outreach Field Agronomist located in Spencer.  The amount of subsoil moisture is sampled in...

Crop Production

Adam Sisson
April 21, 2021 7:50 AM

The Crop Protection Network (CPN) has produced a new web book called Fungicide Use in Field Crops. Fungicides are an important crop protection tool for modern...

Pesticide Education, Plant Diseases

Warren Pierson
April 19, 2021 11:10 AM

The 2021 Virtual Crop Scout School is now available and is free to the general public. The scout school consists of 22 webinars from crop protection specialists at eleven Midwest Universities and is offered through the...

Crop Production, Insects and Mites, Plant Diseases, Soils, Soil Fertility, Weeds, Herbicide Resistance

Meaghan Anderson
April 19, 2021 10:12 AM

Rebecca Vittetoe
April 19, 2021 10:12 AM

It’s hard not to be itching to get in the field and start planting, especially since we are past the April 11th crop insurance date for planting. However, the optimum planting date is dictated by soil conditions (moisture and temperature), the weather forecast, and the calendar date...

Crop Production

Mark Licht
April 16, 2021 11:07 AM

Alison Robertson
April 16, 2021 11:07 AM

With cool weather conditions potentially causing delays in cover crop termination, what options are available? Cereal rye ahead of soybean is not nearly as problematic. While planting green may not be advised for beginning cover crop users, more experienced cover crop users have...

Crop Production

Angie Rieck-Hinz
April 15, 2021 3:57 PM

Recent research showing the benefits of sulfur application to corn in Iowa have many folks asking questions about ammonium thiosulfate or ATS. ATS and ammonium sulfate (AMS) contain both nitrogen and sulfur, however in different amounts. AMS also differs from ATS in that all the sulfur in AMS is...

Soil Fertility

Rebecca Vittetoe
April 15, 2021 9:24 AM

While it seems like most alfalfa fields are greening up quite nicely this spring, there have been a few reports of winter injury in alfalfa stands, especially if stands or parts of stands may have been covered by sheets of ice during the winter.

Take some time now to evaluate stands for...

Crop Production

Ashley Dean
April 14, 2021 4:32 PM

Even though the weather has been variable this past week, one thing is certain: black cutworm is moving through Iowa. During week 2 of the Iowa Moth Trapping Network (April 4 to April 10), our cooperators reported 122 total black cutworm (BCW) and 21 true armyworm (TAW) moths. Windy conditions...

Crop Production, Insects and Mites

Paul Kassel
April 13, 2021 11:43 AM

Does the recent increase in nitrogen (N) cost and the increase in corn grain price warrant a change in nitrogen rates in 2021?  The following discussion gives an overview of the current N cost and corn price situation

New crop corn for delivery during the fall of 2021 was $4.05 per bushel...

Crop Production

Mark Licht
April 9, 2021 2:55 PM

Zachary Clemens
April 9, 2021 2:55 PM

Choosing a corn seeding rate is as much art as it is science because soil conditions and seed quality can greatly affect the outcome. The goal is to choose a seeding rate that produces an economical optimal yield as opposed to the maximum yield. A seeding rate has to factor in seed quality,...

Crop Production

Justin Glisan
April 9, 2021 12:21 PM

Dennis Todey
April 9, 2021 12:21 PM

The final April climatological outlooks issued by the Climate Prediction Center (CPC) show elevated chances of warmer than average temperatures. On the precipitation front, there is no clear signal for Iowa, as outlooks continues to show a moderate La Niña configuration with above average...

Crop Production

Paul Kassel
April 9, 2021 10:10 AM

The following are a few thoughts on nitrogen (N) management for the 2021 growing season.  Many fertilizer decisions have already been made - however a quick review of N plans is in order. However, the recent increase in corn grain prices and in-season cost of nitrogen fertilizer may warrant of...

Crop Production

Ashley Dean
April 8, 2021 11:02 AM

The 2021 moth trapping season is underway, and our volunteers placed traps the week of March 28. Black cutworm (BCW) monitoring is a long-standing project in Iowa, and true armyworm (TAW) was added in 2017. Both of these pests are migratory, making it difficult to predict where populations will...

Crop Production, Insects and Mites

Ryan W Bergman
April 7, 2021 6:26 AM

Meaghan Anderson
April 7, 2021 6:26 AM

As the weather turns warmer and the days grow longer, many of us are thinking about getting equipment like sprayers ready for the spring. Beyond making sure the machine is mechanically sound and fit for spring (which...

Equipment and Machinery

Prashant Jha
April 6, 2021 11:06 AM

Meaghan Anderson
April 6, 2021 11:06 AM

Ramawatar Yadav
April 6, 2021 11:06 AM

As it has started to warm up, folks are ready to implement early-spring weed management programs, especially in fields with infestations of winter annuals like field pennycress and marestail (horseweed). Spring burndown (preplant) herbicide programs should target winter annual plants at the...

Weeds

Alison Robertson
April 6, 2021 8:30 AM

Jyotsna Acharya
April 6, 2021 8:30 AM

As more producers integrate cover crops into their operation, there has been increased interest in planting corn into a green or living cover crop, such as cereal rye, and terminating the cover crop after planting.

To help provide some insight into how “planting green” might affect corn...

Plant Diseases

Levi Powell
April 6, 2021 6:26 AM

Ryan W Bergman
April 6, 2021 6:26 AM

Program Specialist Levi Powell with ISU Digital Ag explains a quick tutorial for checking the closing wheel alignment of your planter in the shop before heading to the field.

Equipment and Machinery

Levi Powell
April 5, 2021 6:26 AM

Ryan W Bergman
April 5, 2021 6:26 AM

ISU Digital Ag Program Specialist Levi Powell explains a simple process for checking planter depth settings in the shop to increase machine accuracy before you head to the field.

Equipment and Machinery

Alison Robertson
April 2, 2021 2:02 PM

Sarah Kurtz
April 2, 2021 2:02 PM

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...

Crop Production

Terry Basol
April 2, 2021 1:30 PM

Mark Hanna
April 2, 2021 1:30 PM

Ryan W Bergman
April 2, 2021 1:30 PM

Joshua Michel
April 2, 2021 1:30 PM

The recent dry conditions across the state, carried through from the 2020 growing season, has created an environment in which field fires are of concern this spring if current conditions continue to persist.  Strong winds can increase problems by acting as a catalyst, drying crop residue,...

Crop Production, Equipment and Machinery, Soil Fertility

Levi Powell
April 1, 2021 1:17 PM

Ryan W Bergman
April 1, 2021 1:17 PM

Spring planting season may come with added challenges as growers continue to deal with the effects of last August’s derecho event. Many fields through central Iowa were riddled with downed corn, and while some fields were able to be partially harvested, others were damaged so severely that...

Crop Production

Mark Licht
April 1, 2021 11:35 AM

Zachary Clemens
April 1, 2021 11:35 AM

The nice weather and dry conditions have led some to think about the start of planting. My opinion, it is too early. Remember crop insurance replant dates are not until April 11. Use the extra days to get plans in order and a little rest and relaxation before the pace picks up.

...

Crop Production

Meaghan Anderson
March 26, 2021 12:55 PM

Bob Hartzler
March 26, 2021 12:55 PM

Susana Goggi
March 26, 2021 12:55 PM

Volunteer corn remains high on many minds this spring and one of the biggest questions is how much of those corn seed will germinate this spring. In an effort to learn more about the challenge we’re facing, Bob Hartzler collected soil and corn ears from the same fields he collected from last...

Crop Production, Weeds

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