Answered By: Connie Britton Last Updated: Aug 21, 2014 Views: 202
The main resource for information about pollination of specific crops is called Insect Pollination of Cultivated Crop Plants by S. E. McGregor.
There is a section on each of your crops with contain research information on hives/acre. The county extension service in your state may have information specific to crops grown in your area. To locate your county's extension office, go to your state in this list: http://www.csrees.usda.gov/Extension/USA-text.html