Monday, July 15, 2024
HomeNRCSBury Your Briefs: Discover the Keys to Soil Health "Tighty Whitey" Style

Bury Your Briefs: Discover the Keys to Soil Health “Tighty Whitey” Style

Thanks to Kara Pugsley and the South Dakota Soil Health Coalition for sharing this article with us!

South Dakota farmers are planting something new to test soil quality – their tighty whities. They start with a few pairs of clean 100 percent cotton briefs, bury them a couple inches in the soil, and dig them up about six weeks later. Poor quality soil will yield almost fully-intact briefs, but biologically active, high quality soil will leave the briefs in tattered remnants, with only the elastic band remaining.

While the sight of someone out in a field burying underwear may raise some eyebrows, it’s an effective way to hit home one key point: healthy soil is active soil.

Dennis Hoyle of Roscoe, SD, buried some briefs when he hosted the first South Dakota Soil Health School held by the South Dakota Soil Health Coalition. When Hoyle buried a brief in a reduced-tillage soybean field, it had much less material remaining than the brief buried in the field of conventional tilled corn. “We need to keep the roots and residue on the soil so that we have more activity to eat up the cotton (carbon) in the underwear,” explained Hoyle.  “Tilled land does not have enough of the biology to “eat” the tighty whities,” he said. “When you are tilling the land, it’s like you are creating a tornado in the soil and removing much of what’s hungry for carbon.”

Do This At Home

The “bury your briefs” test is simple and easy to perform. Whether done in a field or garden, it’s fun to do a comparison and choose areas where the soil has been managed differently, such as a long-term no-till area compared to a conventional tillage area.

To run the test, take a few pairs of men’s cotton underwear and bury them horizontally in the ground for 6-8 weeks then dig them up. Compare the weight of new briefs to the ones that were buried. The weights and level of decomposition should provide a telling picture of what’s going on with the soil.

Can you guess what kind of soil each of these underwear were buried in? Pictured Hailee and Brayden Briggs of Midland, SD

“This experiment is a fun way to look at soil quality,” explained Eric Barsness, Natural Resources Conservation Service Agronomist, Brookings, SD. “With proper management, the ground beneath your crops should teem with millions of tiny lifeforms—bacteria, fungi, protozoa, nematodes, arthropods, earthworms—all eating and decomposing organic material, such as the carbon in the briefs.”

Follow the Basic Principles of Soil Health

If the briefs are intact, the soil biology needs improvement. Barsness explained the best way to improve the soil biology is to follow the basic principles of soil health:

1. “Make sure to keep the soil covered with residue, which provides a consistent temperature and moisture level for microbes to thrive,” he said. “And limit tillage and any soil disturbance.”

2. Barsness said another key principle of soil health is keeping a living root in the soil. “Keeping those roots will aid water infiltration and air movement,” he explained.

3. Also, integrate livestock in the fields, added Barsness. “Grazing livestock will break down crop residues and increase soil microbial activities.”

Farm operator Jon Rohrbach said the test really opened his eyes and caused him to change the way he managed his soil. “I thought I was doing everything right before I went to the soil health school, but it taught me I was doing some things that were counterproductive,” said Rohrbach, whose farm is located northeast of Roscoe.

Rohrbach has practiced no-till for the past twenty years. “But once in a while, I tilled to get the residue down, and that’s where I was being counterproductive for my goal of having healthy soil.” He shifted his practices and has done absolutely no tillage in the past 3 years.

Producer Brian Hoffman, of Leola, also attended the Soil Health School in 2017. Hoffman grows corn, beans and oats and has cattle. The briefs that he dug up were almost completely disintegrated from soil activity – with only the elastic band remaining. “I learned from that experience that it’s much better not to work the soil,” he said. “Tilling just breaks down the structure, it does not add anything.”

Seeing the results of the test “reinforced for me that no-till really does work,” he added. “Add in cover crops and cattle on that land, and all of that works together to improve that soil.”

Don Nickelson, farm owner near Frederick, SD, also attended soil health school and saw the comparison of briefs. “It was amazing to see how the no-till soil was able to dissolve the underwear compared to ground that had been tilled,” he said. “It really got me thinking at different ways to improve my soil.”

Burying your briefs year after year is a one way to measure the progress of your soil health over time. Of course, you could also do regular soil testing and keep your underwear in the dresser drawer. And don’t miss this week’s Classic by NatGLC for more soil tests you can do at home.

For more information on the principles of soil health and resources in your area, visit your local Natural Resources Conservation Service (NRCS) office. Click here to find your nearest office. And here’s a shout out for the NRCS’s Conservation Planning assistance. It’s a great way to have someone take a look at your place, provide suggestions for things you can do to improve your operation and soil health, and there might even be financial assistance to get going.

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Kathy Voth
Kathy Voth
I am the founder, editor and publisher of On Pasture, now retired. My career spanned 40 years of finding creative solutions to problems, and sharing ideas with people that encouraged them to work together and try new things. From figuring out how to teach livestock to eat weeds, to teaching range management to high schoolers, outdoor ed graduation camping trips with fifty 6th graders at a time, building firebreaks with a 130-goat herd, developing the signs and interpretation for the Storm King Fourteen Memorial trail, receiving the Conservation Service Award for my work building the 150-mile mountain bike trail from Grand Junction, Colorado to Moab, Utah...well, the list is long so I'll stop with, I've had a great time and I'm very grateful.


  1. If the neighbours see you burying your briefs, you could just tell them you are being prophetic:

    Jeremiah 13 The Message (MSG)

    “13: 1-2 God told me, “Go and buy yourself some linen shorts. Put them on and keep them on. Don’t even take them off to wash them.” So I bought the shorts as God directed and put them on.
    3-5 Then God told me, “Take the shorts that you bought and go straight to Perath and hide them there in a crack in the rock.” So I did what God told me and hid them at Perath.
    6-7 Next, after quite a long time, God told me, “Go back to Perath and get the linen shorts I told you to hide there.” So I went back to Perath and dug them out of the place where I had hidden them. The shorts by then had rotted and were worthless.
    8-11 God explained, “This is the way I am going to ruin the pride of Judah and the great pride of Jerusalem—a wicked bunch of people who won’t obey me, who do only what they want to do, who chase after all kinds of no-gods and worship them. They’re going to turn out as rotten as these old shorts. Just as shorts clothe and protect, so I kept the whole family of Israel under my care”—God’s Decree—“so that everyone could see they were my people, a people I could show off to the world and be proud of. But they refused to do a thing I said.”

    Apparently linen work as well as cotton.

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