farming

From a site used by the military 1810-1817, but also used for farming later. What are these?

My dad farmed in Illinois for almost 30 years and found this in one of his fields when he was out plowing one day. This would have been in the 1950 - 70's. He is in his 90's now and is, of course, going through his life memories and is very curious about this item. Can anyone help him out? He...

Hi all, New to metal detecting and to this site, but I'm super excited about my first finds. I searched an old suburb of Boston (private land with permission) known for farming as far back as the 1700s. I unearthed the following things: I'm particularly interested in what those large (and...