You can have the most productive cows in the world, but when they have no access to water and good quality feed, then they will not produce milk. The OutPut is determined by the InPut

The water and feed should be brought to the ladies, who need shelter against the sun. This is why dairy farming and Feed production are strongly correlated.

Climate

Soil Quality

Seasonal Effects

Quality & Quantity

Cooperatives

Protein from ‘own’ land