Abstract: Young grass having a moisture content of about 80% is dried in layers by forcing a stream of air through the layer. The thickness of the layer and the conditions of the drying air are adjusted so that when most of the grass in the layer is sufficiently dry (about 12% moisture), there will still be present an outer layer which is by far not dry (moisture content of about 65%). Thereby, the drying air emerging from the layer will have a humidity of approximately 100%, meaning that the drying capacity of the air has been exhausted. When the humidity of the drying air emerging from the layer falls substantially below 100%, the major part of the grass will have been dried to the desired dryness (about 12% moisture). It is then not economical to continue the drying process, which is consequently interrupted, the not yet dry minor part (outer layer) of the grass being transferred for drying together with further green grass in another drying process.