Dissecting a sod house to discover the past
By NET News
April 2nd, 2014
Omaha, NE — Larry Estes has had a sod house in his backyard in Gates, NE, as long as he can remember. He never really thought anything about it until a year ago.
“A guy by the name of Joe Willhoit was working on my air conditioner. He said, ‘Is that a soddy?’ And I said, ‘Yes.’ From there on it just mushroomed. I canâ€™t understand in my own mind why itâ€™s important, but as many people who are here, it must be,â€ Estes said.
Itâ€™s important because, for a team of scientists from Lincoln, the sod house represents a snapshot of prairie life from more than a century ago. The scientists want to dissect this whole wall: take it apart and analyze everything inside it in a kind of autopsy.
Late last fall, Estes and others from the Custer County Historical Society tried to separate just one wall from the rest of the house. The whole thing weighed almost two tons.
John Carter, a historian with the Nebraska State Historical Society, described moving the wall as, â€œno small challenge. But you know, weâ€™re inventing this as we go along.â€
They got it to work â€“ eventually. It ended up taking about three hours, and a couple near misses with a tree branch. The wall eventually was placed on the back of a flatbed tractor trailer, packed between two wood pallets and wrapped in plastic â€“ like a giant ice cream sandwich.
What dirt can tell us
LuAnn Wandsnider is a professor of archaeology at UNL and one member of the autopsy team. She was in Estesâ€™ backyard the day the wall came down. She wants to know if the sod house can tell a more detailed story about homesteaders in Nebraska.
â€œItâ€™s a laboratory that we can kind of look to see over the course of hundred years, what happened as people dealt with changingÂ economic situations and as droughts came and affected them,â€ Wandsnider said.
The wall was in storage on UNLâ€™s east campus for most of the winter. In March, Wandsnider and Carter joined Dave Wedin, a grasslands ecologist at UNLâ€™s School of Natural Resources, to start the autopsy.
First, they had to take the wall apart. Wedin inserted a wide trowel between two layers of brick. David Murphy, an architectural historian at the Nebraska State Historical Society, said the wall hasnâ€™t been that hard to take apart.
â€œIt kinda jostled in transit. The seal broke a little bit. Weâ€™ve been using these wide trowels, to make sure we donâ€™t break it. And then it just seems to fall right out,â€ Murphy said.
Even though the wall comes apart pretty easily, the bricks themselves are really sturdy.
â€œTheyâ€™re amazing, you know. You can still see roots sticking all through it to hold it together,â€ Wedin said.
Those are roots from the prairie grasses that were growing in the dirt before that dirt became building material. The sod is a kind of time capsule from a hundred years ago. Like settler life, we have some idea of what the prairie was like at that time. But Wedin wants to know more.
â€œLewis and Clark made notes about the prairie but they werenâ€™t quantitative data, they werenâ€™t how much of this species? How much of that species? And they certainly didnâ€™t measure how much organic matter, what percent carbon the soils had back then when they went through,â€ Wedin said.
Wedin will use modern techniques to analyze the sod bricks to get the same kind of information we have about the prairie today. Those details might sound trivial, but they can help scientists see how much or how little the prairie has changed in the past century.
Because thereâ€™s so much of it, the wall is also a chance to just try things. Wedin and the other scientists on the team can be creative with their experiments.
â€œWe have chunks of this that weâ€™ve broken up and put it in a greenhouse flat and weâ€™re watering it to see if anything will germinate,” Wedin said.Â “The science tells us, you know, 99.9% of seeds are never gonna make it a hundred years. Iâ€™m not sure if it would revolutionize science in any way but itâ€™d be really neat if we could.â€
The intangible results
Back at the service shed at UNL, Wedin and Murphy take measurements of the huge brick they just removed. Wandsnider notes where in the wall this brick came from so later theyâ€™ll be able to match it to their data. Wedin cuts the brick into samples for the labs.
â€œItâ€™s like cutting up a Dairy Queen ice cream cake. What piece do you want?â€ Wedin said.
The autopsy is going to take a long time. The team still has to peel apart the rest of the bricks and divide them up among the labs doing analyses, and thereâ€™s still more than half the wall to go through. It will be a while before they get any results. But even though the autopsy is still in its early stages, Wedin said itâ€™s already producing something – collaboration between different kinds of scientists.
â€œIâ€™ve never actually worked on the same soil samples with an archaeologist, or a historian. And even some of my colleagues, my entomologist friends and stuff. Iâ€™ve never actually worked with them on the same sample on the same place. The interdisciplinary nature of the project, thatâ€™s what science should be,â€ Wedin said.
These findings may only apply to this one specific area of the prairie and to this one specific sod house. But their research could be part of a bigger collaboration. Their techniques and data could be used by other scientists to study more sod houses and help us get a better picture of our past.
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