Silage making is an attempt to achieve vacuum and acid environment in rotating storage or Rotary Fermentor Silo ( RFS) Silase.

In vacuum and acid environment, so bacteria and fungi will die pembusuk until greens are durable in it. Vacuum conditions can be implemented by storing greens in a tightly closed, and with the accumulation of compacted greens.

Acidic environment ( pH = 3-4) can be done by giving preservatives either directly or indirectly by adding chemicals such as formic acid ( 0.8% of fresh forage) , whereas indirect preservative by adding ingredients which contains a lot of carbohydrates such as rice bran ( 5% of fresh greens) , molasses ( 3% of fresh greens) , groats ( 3.5% of fresh forage) and onggok ( 3% of fresh greens) .

To achieve a complete feed silage quality on offer rotary fermentor Shiloh ( RFS) 1700 L with specifications dimensions ( height = 180 cm, width = 165 cm and length = 230 cm) tube fermentation media made   from fiberglass resin material PL 07 LPE, the type of mat WR 400 ( mat anyam) and mat Jushi -Kwe 300 ( random) 300 x 104, catalyst butanox, mirror glase, pigment green dolphin HCA and aerosil HDK has a wall thickness of 3-5 mm, equipped with a stirrer made   of iron stirrup 12 ' ' . Frame made   from steel UNP, reducer, door seal leakage resilient economic times over 5 years.