AMES, Iowa — A new research project is underway to explore how Iowa farmers could use cover crops as a way to prevent soil, nitrogen and phosphorus from leaving farm fields.

The group, Practical Farmers of Iowa, says cover crops such as cereal rye can be planted in the fall and then terminated in the spring by using a mechanical roller-crimper, avoiding the use of chemicals or the need for tiling.

Tim Sieren farms 350 acres of corn and soybeans in southeast Iowa and says he's a conventional, not organic farmer but wanted to try it because it's important to think outside the box.

"The number one reason is for erosion control, and then after you start doing it for a few years, you build your organic matter in your soil, if you use no-till and cover crops over time, you can build it about twice as fast with the cover crops as you can just doing straight no-till," he explains.

Cover crops grew on only 2.6 percent of Iowa's nearly 23 million acres of corn and soybeans in 2016. In contrast, cover crops were planted on more than seven percent of the 11 million acres of corn and soybean acres in Indiana during the same period.

Sieren notes that the roller-crimper method is dependent on a large amount of cover-crop growth and the cover crop reaching the flowering stage in late May before crimping. He says if he can perfect using the system in soybeans and still maintain yields, he could drastically reduce herbicide use.

"And what guys are finding out is that you can even plant the soybeans in the green-growing rye and still let the rye grow and then terminate it later when the soybeans are coming up so you get more growth out of the rye," he adds.

Practical Farmers says research shows farmers could save thousands of dollars on herbicides each year by adopting innovative techniques such as the roller-crimper. Herbicides can cost from $25-55 dollars per acre, depending on the crop.


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The chair of the Federal Trade Commission will be in rural Iowa this weekend to hear from farmers and other residents about the proposed sale of Iowa Fertilizer to Koch Industries.

The sale is pending FTC approval. Iowa spent $500 million to build an Iowa Fertilizer factory in Weverly to create competition in an already consolidated industry.

Aaron Lehman, president of the Iowa Farmers Union, said he plans to tell FTC Chair Linda Khan a sale to Koch Industries would backtrack on any competitive progress the state has made.

"Our concern is that an industry that already lacks competition and has all sorts of monopoly problems would only get worse if this sale is allowed to go through," Lehman explained.

Koch and other corporate ag conglomerates have said consolidating allows them to provide better products to farmers more efficiently. The hearing is set for Saturday on Main Street in Nevada.

In addition to reducing competition for fertilizer, Lehman argued the sale would increase prices for farmers, and ultimately mean higher food prices for Iowans. He wants Khan to hear stories firsthand, from the people on the ground in Nevada.

"We know that we might not be able to have a dialogue with the people who are investigating this situation, because they need to be impartial," Lehman acknowledged. "But our farmers need to tell their story about how the industry is already in a monopoly state."

Some 18 other ag organizations have joined the Iowa Farmers Union calling on the FTC and the Justice Department to investigate the proposed sale.

A farm group is helping Iowa agriculture producers find ways to reduce the amount of nitrogen they use on their crops.

Excess nitrates can wind up in ground and surface water, and cause health problems.

Practical Farmers of Iowa is encouraging farmers to find just the right amount of nitrogen they need for their crops - while avoiding applying too much, which the group says is common.

PFI's Field Crops Viability Coordinator - Chelsea Ferrie - said thanks to federal grants and private funding, the group will pay farmers up to $35 for every acre that has a lower than normal yield if they didn't apply enough nitrogen.

"No cost to the farmer, either," said Ferrie. "We're trying to help incentivize them. This is something that farmers want to do - I mean, they want to be good stewards of the land - but also, that they need to have a profitable farm."

The application period for the program is open through the end of April.

To help them reach the right nitrogen balance, Ferrie said PFI will help farmers on the front end of the process, too - so they aren't left guessing how much to apply.

"Talk through what your typical fertilizer plan is, and what your reduction plan would be," said Ferrie. "Then you would implement this year, going into the spring and into the season."

Farmers have relied on nitrogen-based fertilizers for generations - but when applied in excess, nitrates run off into ground and surface water, posing health concerns for animals and people.




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Pesticides are still common in agriculture. Organic producers who avoid them have seen ups and downs in pushing for stronger regulations, and they point to a South Dakota example of the harm associated with widespread use among neighboring farms.

At the heart of the regulatory fight is the application of the weed-killing pesticide dicamba, and how it can drift from one farm to another. Last month, a federal court blocked "over the top" spraying of dicamba products, but the EPA followed with an order to allow the spraying of existing supplies.

Glenn Pulse, co-owner of an organic farm in Vermillion, said a 2017 drift incident had a big impact on his operation.

"Our entire farm was covered. We lost a lot of livestock, and thousands of bees were killed," he explained.

It also resulted in health concerns for his family, having to regain his organic farmer certification, and a legal battle over restitution. Groups such as the National Family Farm Coalition have been fighting what they call the deregulation of these chemicals, arguing the drift and runoff effect has damaged millions of crops.

Dicamba-manufacturing companies deny responsibility, instead blaming farmers who apply it for not following guidelines.

The EPA has said there were already millions of gallons of dicamba in circulation prior to the court's ruling, prompting the agency's order. Pulse feels there are farmers who are careful in spraying chemicals, but he wants stronger enforcement against those he describes as "loose cannons."

"The guys that are not following the labels and they're spraying in weather conditions that are not favorable, that is where, I would say, 90% of the problems are happening with drift incidents," Pulse said.

His calls for better responses to these incidents coincide with policy demands to heavily restrict dicamba products. Meanwhile, Rep. Dusty Johnson, D-South Dakota, is the main sponsor of a bill supporters say would assure uniformity in national pesticide labeling under federal law. But opponents argue it would limit longstanding state and local pesticide safety rules.