Start · A hole that smells like a plan
Silage pits
Cover if you stay in it. A nest if you picnic. Don't drink it.
When
To skip a field you don't want to paint. A second, then out. See ditches.
Don't
Don't both fill the pit. That's a grenade with extra smell. See farms.
Water
It's not a well. A well is still free. See well etiquette.