No-Till, Grassed Waterways Protect Linn County Farm
By Jason Johnson, Public
Affairs Specialist
October 2008
Coggon, IA – A combination of no-till and small grassed waterways
delivered a one-two punch to potential storm damages and erosion for Linn County
farmer Jack Kintzle after continuous heavy rains hit his farm April through
June. His conservation work helped minimize potential crop replanting as well as
severe soil erosion on his 1,400 acres of cropland.
The former president of the National Corn Growers Association has farmed for
43 years. He says this year was especially difficult for local farmers because
the ground saturated by May, and then several three- to four-inch rain events
hit the area. “These rains caused more (crop and erosion) damage than a
five-inch rain earlier in the spring because of the ground saturation,” he said.
Linn County District Conservationist John Bruene with the
U.S. Department of
Agriculture’s Natural Resources Conservation Service (NRCS) surveyed the county
for damage to conservation practices in June. He spotted at least 20 sites
averaging $15,000-$20,000 in practice repair costs.
In addition to damaged practices, thousands of crop acres in Linn County
needed replanting this year. Kintzle replanted 17 acres of corn and three acres
of beans on low-lying areas, where ponding occurred on the flat landscape. But
his other cropland, which includes three- to five-degree slopes, stayed
relatively dry. Kintzle credits no-till and well-designed, well-maintained small
grassed waterways for the success.
He says tillage methods make a tremendous difference in maintaining a healthy
soil profile and preventing soil erosion. Kintzle took over operations of his
father’s 320-acre farm five years ago. He says no-till helped reduce the need
for replanting because of increased water infiltration.
Kintzle calls his father’s cropland a “wet farm.” “No-till has really
decreased sheet and rill erosion on that farm,” he said. “It is important for
farmers to not till anymore than absolutely necessary.”
Kintzle also reconstructed small grassed waterways on his father’s farm,
where sediment buildup through the center of the waterways caused water to run
down the sides, causing gully erosion. Since the waterways were past their
10-year lifespan, Kintzle received cost-share from the
Iowa Department of
Agriculture and Land Stewardship-Division of Soil Conservation (IDALS-DSC) and
technical assistance from NRCS in 2004 to reconstruct more than 5,000 feet of
small grassed waterways.
NRCS designed 30-foot wide small grassed waterways with fabric checks that
line the outlet areas to help stabilize the soil during grass establishment.
Bruene says the goal of waterway design is to minimize both siltation and
gullying. “We want water to run down the center of the waterway,” he said,
“preventing it from spilling out and cutting a path along the outside edges.”
To maintain his waterways, Kintzle says he lifts his implements out of the
ground before crossing. He also tries to plant rows into the waterway, instead
of along the sides. And Kintzle allows a local cattleman to mow and bale the
grass for livestock, typically in the fall to benefit wildlife nesting.
Bruene commended Kintzle for his conservation efforts. “What impresses me
about Jack is he doesn’t wait for someone to tell him he needs to fix something
on his farm,” he said. “If there is something that needs fixed, he’ll fix it.”
Kintzle feels government support for conservation is strong for Iowa farmers.
“I think farmers are offered enough tools, programs and incentives to help put
and maintain conservation on the land,” he said.
For more information about a conservation plan to help you protect your
natural resources, visit your local USDA Service Center.
Inspect For Practice Damages
A great time to inspect your farm for conservation practice damages and gully
erosion is after harvest, when the land is clear of crops. If you see signs of
blown-out terraces, small grassed waterways that are not functioning properly,
gullies forming on slopes, or other problems that need attention, visit your
local NRCS office. Financial assistance may be available to install or rebuild
conservation practices damaged by this year’s floods and severe weather.
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