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• The milk yield is improdved:
• South African dairy farmers have experienced an increase of up to 10% in milk production when feeding hydroponic or aeroponic green feed, as opposed to the normal total mixed ration (grain-based). This increase can be ascribed to the catalytic effect the green feed has in the rumen.
• The butter fat content is raised: Cows fed on barley/oats green feed has an unsaturated fatty acid content that is up to 14% higher than cows fed on a total mixed ration (Ryan, 2003).
• Premium prices are paid for higher grades of butter fat in milk.
• The quality of the milk is improved.
• The supplemental feeding of barley/oats green feed keeps the cows healthy.
• The time from birth to weaning is reduced.
• The dairy cattle experience an increase in appetite.

A marked drop in milk production is evident in cows going off the green feed during lactation.