Silage is a forage conservation process. It refers to products whose preservation is based on the presence of lactic acid from fermentation (anaerobic process). Lowering the resulting pH halts all life and silage is perfectly preserved, as long as it is not in contact with air.
Silage concerns mainly herbaceous crops such as Chloris Gayana and corn. Indeed, the high nitrogen content in crops such as alfalfa are poorly suited to this method of preservation. The production of silage is an easy but cumbersome operation: digestibility is conditioned by the quality of hashing (especially corn), which requires high power.
Two types of forage harvesters are available on the market:
- SPFH (Self propelled forage harvesters),
- and those driven by a tractor.