What a day! But to me seems much more like an undetected area than a change in frequency.
Thanks Iron Patch, it was crazy popping so many so quickly. The ground was softer after some much needed rain, but was still tough digging these in the road/lane that goes around the house. It's definitely the type of area other detectorists would avoid when the prairie heat has baked it into seeming solid rock.
The landowner told me that several people had detected this farm 30 years ago, and I believe it due to the lack of coins. This was an important farm and should have been loaded with coins. I have found a handful of cents, and most of them were deep and or close to iron junk. The buttons were giving a high 60's low 70's signal, and I think the other guys just cherry picked the coins, especially the SILVER.
Ok, now I'm going to go on a tangent because I think it's interesting. My wife is the administrator for our town, not far from this farm. Part of her job is record keeping at the cemetery. In 2010, an elderly woman from California (104 yrs old!) wrote my wife a letter. She was wanting to check the status of her parents graves, and make a donation. They quickly became pen pals. Turns out she was born here (born 3lbs, not expected to survive), and her farm was right across the road from my button farm. My wife mentioned that she was married to a metal detectorist very interested in local history. She thought that was great, and told some very interesting stories. One story started "Walking to my first day of school in 1912, I lost my little gold ring with an emerald". Another was "My mother sold some vegetables at the local market, and came home with a silver dollar. My uncle jokingly smacked her hand, and the dollar fell between the floorboards. Nobody was easily able to retrieve it, so there it stayed for a rainy day". She did mention the farm across the road (button farm), and it sounded like it was one of the first farms around, and was a hub of activity.
I think the last time she wrote was in 2012, and we learned she passed away in 2014 at age 108. The stories she told certainly fuelled my love of local history, and I wish I could have had a face to face conversation with her.
Naturally I was very excited to get permission here. Although I was hoping for some awesome old silver, I am more than happy to have found the buttons. Sorry for blabbering, just thought it was cool to get firsthand information from someone born in 1906!