Speculation

We were driving to town last night and I saw headlights in a remote field.  It caught my attention because it was 16 degrees outside and I wondered what a farmer would be doing in a field at dusk on such a cold day.  As we got closer, I could see a back hoe in a dark field burying something.  Now I ask you, what would a farmer bury in a field at dusk in 16 degree weather?