Nutritional information on calcium is available from the University of Connecticut Cooperative Extension Service, 670 Wintergreen Ave., Hamden. They also have information on agriculture and can, for a fee, provide soil tests.
Free soil tests, pH etc., are available from the Connecticut Agricultural Experiment Station on Huntington St., New Haven.
KAL makes a self check up kit, Calcium test. I got one at Edge of the Woods food store on Edgewood Ave. in New Haven.
The West Rock Nature Center on Wintergreen Ave, a New Haven park in Hamden, is the site of the High School in The Community Ecology class and an important resource for the study of ecology.