James A. Erdman

• Elemental composition of corn grains, soybean seeds, pasture grasses, and associated soils from selected areas in Missouri
• Elemental composition of selected native plants and associated soils from major vegetation-type areas in Missouri
• Environment of Mesa Verde, Colorado
• Impact of the lower Alamosa River water on alfalfa, southwestern San Luis Valley, Colorado--1994 follow-up study
• Impact of the Summitville Mine on irrigation water, agricultural soils, and alfalfa in the southwestern San Luis Valley, Colorado
• Pinyon-juniper succession after natural fires on residual soils of Mesa Verde, Colorado