English: Making silage for feeding animals in winter on Lowsteads Farm near Longhoughton in Northumberland, Great Britain. Marked as 'Low Stead' on the OS 1:50000 map, Lowsteads Farm is half-a-mile south of Longhoughton village. In this photograph, a tractor-towed baler has collected the partially-dried mown grass and left cylindrical bales in the field ready to be enclosed in polywrap.
Silage is animal fodder that is harvested while still green and kept succulent by partial fermentation. This can be done in a silo (hence the name) or in a silage clamp. More recently, the practice has been to ferment silage by wrapping baled harvested fodder - usually grass in the UK - in polywrap plastic sheeting.