These sites may be of interest to you.
American Farm Bureau Federation
The voice for agriculture in the United States.
Hawaii's Agricultural Gateway
This site focuses on the business of agriculture for Hawaii entrepreneurs.
College of Tropical Agriculture and Human Resources, University of Hawaii at Manoa
This college provides research, outreach/extension, and instructional services to the people of Hawaii and often in the region.
Hawaii Agricultural Research Center(HARC)
This institution worked at one time primarily on sugar but today works on many types of agricultural products.
Hawaii Department of Agriculture
The State's agriculture branch.