backfurrow
ˈbækˌfərəʊ
Definitions
1. noun
A small valley or depression in the ground, especially one created by the action of a glacier.
“The geologist studied the backfurrow left behind by the retreating glacier.”
2. verb
To plough or cultivate a field in a particular way, especially to create a backfurrow in preparation for planting.
“The farmer had to backfurrow the field to make it ready for the spring crop.”