1939 J. R. McCalmont 2 Silos may be divided roughly into above-ground—tower or upright—and the below-ground—pit or trench—silo, either of which may be built for temporary or continued use.
1982 19 Apr. 9/3 Tower silos, standing as they do up to some 60 feet high and painted in various..colours are not particularly attractive features of our rural areas.