Definition of windrowing:
(n) :
A row of cut grain or hay allowed to dry in a field.
(n) :
A line of leaves etc heaped up by the wind.
(v) :
(transitive) To arrange (e.g. new-made hay) in lines or windrows.
(n) :
(Canada) A line of snow left behind by the edge of a snowplow’s blade.
(n) :
(by extension) A long snowbank along the side of a road.
(n) :
A line of gravel left behind by the edge of a grader’s blade.