This outstanding reference book deals with effects of various agricultural practices on ground water quality and usage; and ground water management strategies for protection of ground water affected by agriculture.Ground water conservation, recharge, irrigation effects, soil testing, nitrogen fertilizer, subsurface transport, probability of ground water pollution by ag chemicals, quantitative studies of petroleum biodegradation, simulation of chemical movement in soil, regulation, sewage sludge, nitrate contamination, methodology, developing ground water policy, aquifer systems, incentives to reduce pesticide contamination. Index. 402 pp., 363 references, 1987, ISBN 0-87371-036-3.