Silage is fermented fodder made with chaff or grass.

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But also you can try and make silage either from chaff using a forage harvester or using grass by mowing it. Then you would have to unload it in a silo in the map in which you will have to compact it until it shows compacting 100% in the top left hand corner in the helping keys.

This can then be either sold at the biogas plant or can be fed to the cows as their base food or can also be mixed in a total mixed ration