In the following table we can observe the differences for different indicators of physical/economic of the drums of the Upper Quartile versus the Lower Quartile of a data base with more than 300 dairy farms sorted by Economic Result (us $ /ha). These drums represent almost 10% of the national production. A description of the numbers of the one that goes well (+24% margin net Income) and the goes wrong (+3% margin net Income) for producing milk in Argentina: 
It highlights the importance of a high burden of animal-based rotations forage more productive. The big difference is what happens PER HECTARE and not so much what happens to BY COW...
