Liz Morrison

PPO stewardship is key to fight Group 14 herbicide resistance

The spread of multi-resistant waterhemp has led to increasing use of Group 14 herbicides, the protoporphyrinogen oxidase (PPO) inhibitors that include Cobra, Flexstar, Ultra Blazer and others. Repeated use is exerting intense pressure on this diverse group of chemicals, weed experts warn.

Robot attempts nitrogen sidedress, cover crop seeding

A big challenge – nitrogen management – could have a small solution. Rowbot Systems, a Minneapolis startup company, has developed an multi-platform robot that, among other things, can side-dress nitrogen in tall corn.

Corn residue breakdown myths 1

Three years of tillage and residue field and laboratory trials at Ames, Iowa, found no differences in corn residue breakdown due to tillage or type of residue, says research leader Mahdi Al-Kaisi, ISU Extension soil scientist.

Corn residue breakdown photo journal 1

Andy Thompson kept a photo journal of residue breakdown in his cornfield near Niota, in west-central Illinois. The field has been in continuous corn since 2012. This series of photos shows how, in a single season, microbes in healthy soil break down large amounts of corn residue left on the surface.

Split nitrogen application can protect environment, hedge weather risk, improve profits  2

Compared to putting all the nitrogen down in the fall, “we picked up at least 7-10 bushels per acre,” says Chuck Trainor, who grows corn and soybeans and raises cattle with his father, Charles, near Tower Hill. They also dropped their total nitrogen rate.

Should you use tillage to control resistant weeds? 3

“Do we need to till or not?” Purdue University weed scientist Bryan Young often hears this question from Midwest soybean growers fighting herbicide-resistant marestail, waterhemp and Palmer amaranth.

6 ways to seed cover crops  1

Midwest farmers are deploying many techniques for planting cover crops: broadcasting with fertilizer spreaders, flying on the cover crop and modifying high-clearance sprayers. Others are pairing cover crop seeding with another field operation, such as vertical tillage, manure application or even combining.

Combined drainage and subsurface irrigation cuts water use; management challenging 1

Steve Miller’s “double duty” drainage and sub-irrigation system lets him control the water table in his field year-round. “I thought, if you can suck water out of the field, you should be able to pump it back in!” says the Fairmount, N.D. farmer, who grows corn, soybeans, wheat and sugar beets with his daughters, Alicia Holubok and Amanda Fisher.

New tools, technology help farmers increase water use, irrigation efficiency 1

Sophisticated irrigation management tools are helping growers make the best use of their water resources. Nebraska farmer Greg Greving started using an interactive computer model to schedule irrigation, he now holds off watering soybeans in the early vegetative stage, saving water for grain fill.

Corn stover harvest can benefit agronomics, finances 1

Corn stover baling machines rolled across 2,500 acres of harvested cornfields last fall on Mike and Lyle Greenfield’s Jewell, Iowa, farm. The Greenfields’ stover is headed to DuPont’s new 30-million-gallon cellulosic ethanol plant in nearby Nevada, Iowa.

Analyze data layers 2

Precision ag expert Dan Frick analyzes four data layers to understand how costs per bushel vary within a field. Here, he looks at potassium soil test, yield and cost per bushel to determine where the field getting the most per acre.

Saturated stream buffer test 1

A 120-foot-wide ribbon of deep-rooted switchgrass spools along the Yellow Medicine River, a meandering prairie stream that winds through Doug Albin’s Minnesota farm. For decades, this stream-side grass strip has filtered out pollutants in surface runoff from adjacent cropland.

Make data pay: Track variable rate cost per bushel 1

Integrating financial data and geo-referenced field data is the most sophisticated level of precision ag management, says Dan Frieberg, president of Premier Crop Systems. Precision software captures direct input costs for every 60x60-foot square of the field. The software also allocates indirect expenses by bushel, including insurance, equipment and land costs.

3 steps to create management zones

Precision ag expert Kevin Kruize uses three steps to create management zones in a corn-soybean rotation field. Those steps include pulling data from different precision sources, analyzing data layers and compare productivity and defining preliminary management zones.

Continuing Education Courses
New Course

Accredited for 2 hours/CCA Soil & Water credits. The 2,000 member...

Keeping crop protection chemicals on the crop for which they are intended has been a...

Sponsored Introduction Continue on to (or wait seconds) ×