Answered By: Connie Britton
Last Updated: Aug 21, 2014     Views: 100

The main resource for information about pollination of specific crops is called Insect Pollination of Cultivated Crop Plants by S. E. McGregor. 

http://www.ars.usda.gov/SP2UserFiles/Place/53420300/OnlinePollinationHandbook.pdf

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