In the Modern Times DLC for Tropico 4, your regular Farms get replaced by Bio Farms. These Bio Farms have three work modes: corn, food crops, and cash crops. The latter two modes will grow multiple crops at the same time: food crops will do bananas, papayas, and pineapples, while cash crops will grow tobacco, coffee, and sugar.  (The Bio Farm also generates some corn if it's in the food or cash mode.) Regular farms, of course, only grow one crop type at a time.

The trouble is that the preferred crop conditions for various crops are directly contradictory.  For instance, sugar likes low altitudes and high humidity, and tobacco likes exactly the opposite: high altitudes and low humidity. 

Given that a Bio Farm generates so many things, does it generate less of any particular crop? **If I have a Rum Distillery that I keep supplied with two sugar farms, do I need two Bio Farms to keep it supplied, or do I need three (or more) Bio Farms growing cash crops?** Is the Bio Farm's production of a particular crop reduced because it produces other crops in addition? (Even though those other crops may be in terrible growing conditions where it's not worth spending the effort to raise them?)

Bonus question: how does the productivity of Bio Farms compare to Plantations, when growing a particular cash crop?