To me it looks like a trenching device that then also closes in the trench. Probably drawn by a tractor, bu it appears to have at least one handle at the back.
Maybe a part of a "Planter" for something like potatoes, beet, peanuts etc......
Yes probably, the farmer dropped them down a scute in the middle there somewhere. Even just for large seed. Possibly hand constructed by a handy farmer out of "selected" parts.
Farmers in the bush with little money could be very inventive to improve their productivity.