"Results are presented from two reports on field studies done during a 15- year investigation of the long-term use of sewage sludge on agricultural and disturbed lands. These projects are intended to answer concerns about how sludge applications to soils relate to phvtotoxic accumulations of trace metals and hazardous metal levels in crops. Studies were conducted on plots at the Northeast Agronomy Research Center near Elwood, Illinois at the University of Illinois, Urbana, and on strip-mined land near Canton, Illinois owned by the Metropolitan Sanitary District of Chicago. The first study, entitled "Use of Sewage Sludge on Agricultural and Disturbed Lands," reports the results of the following field studies: (1) response of corn on three soil types previously amended with annual sludge applications, (2) response of continuously planted corn on Blount silt loam to repeated annual applications of sewage sludge, (3) response of winter wheat and soybeans on Blount previously amended with annual applications of sludge, (4) sludge-amended strip-mine spoils continuously planted with corn, (5) differences in Cd and Zn uptake by various corn hybrids, (6) effects of cation exchange capacity on Cd uptake, (7) uptake of metals by spinach from Cd-spiked sludge, (8) response of chickens to Cd in feed, and Cd-induced growth depression and Cd accumulation in chicks as influenced by dietary modifications. The second study entitled "Long-Term Use of Sewage Sludge on Agricultural and Disturbed Lands." reports on the following field studies: (1) the response of corn to repeated annual applications of sewage sludge, (2) the differential uptake of selected corn hybrids grown on sludge-amended soils, and (3) the effects of high sludge application rates on strip-mine spoil characteristics and the response of plants."