Question

why are the years very high under commercial farming​

Answer 1

Answer:

The key aspect of this farming system is large scale production of livestock and crops targeting the market. Most of the time, harvested product is processed through the processing plants before it reaches the consumer. Here, the main objective is earning much profit as possible from low input. Therefore, the productivity is very high.

Answer 2

Air has 78% nitrogen, 21% oxygen and 1% other gases means all gases are mixed in unequal amounts then it should be a heterogeneous mixture