If farmers wanted to increase the amount of naturally occurring nitrate in their farm fields so that they would have to apply less of it as fertilizer, what would be the best thing for them to do?

Question

anonymous · Answer

Flood the fields periodically to encourage anaerobic bacteria.

 Sterilize the soil to remove all the bacteria from it.

 Alternate their normal crops with crops of legumes.

 Water more frequently to pull nitrogen from the air.

anonymous · Answer

C