http://ag.senate.gov/site

The Senate Agriculture Committee has oversight over matters relating to: U.S. Department of Agriculture (USDA) activities including farm payments, crop insurance, conservation programs, and livestock marketing rules; the Rural Utilities Service and Rural Development, which carryout important programs relating to rural energy development, rural business financing, and rural health care services; Nutrition programs including the National School Lunch Program, the Women, Infants and Children program, and the Supplemental Nutrition Assistance Program (formally known as food stamps); and the Commodity Futures Trading Commission, which oversees all futures markets.

http://commerce.senate.gov/public/

The Senate Committee on Commerce, Science, and Transportation has jurisdiction with matters relating to: Coast Guard; Communications; Highway safety; Inland waterways; Interstate commerce; Marine and ocean navigation safety and transportation; Marine fisheries; Merchant marine and navigation; Nonmilitary aeronautical and space sciences; Oceans weather and atmospheric activities; Regulation of consumer products and services; Regulation of interstate common carriers, including railroads, busses, trucks, vessels, pipelines, and civil aviation; Science, engineering, and technology research and development and policy; Sports, and Transportation.

http://finance.senate.gov/

The Senate Committee on Finance has jurisdiction with matters relating to: taxation and other revenue measures generally; bonded debt of the United States; customs, collection districts and ports of entry and delivery; reciprocal trade agreements; tariff and import quotas; the transportation of dutiable goods; deposit of public moneys; general revenue sharing; health programs under the Social Security Act, including Medicare, Medicaid, and other health and human services programs financed by a specific tax or trust fund; and Social Security.