No description available.

No description available.

Call number: LD2668 .T4 1985 D385 / Master of Science

Two municipal sludges, one from a highly industrialized city, Chicago, and another from a lesser industrialized, highly agricultural area, Tucson, are compared for barley production on Pima c 1 (Typic torrifluvent). Both sludges were responsible for highly significant additions of Zn, Cu, Ni, Cd and P to the soil each year at the rates of 100mt/ha single and 20mt/ha for 2 years. Nitrogen responses for barley straw and grain were observed from both sludges. Tucson sludge appears to be attractive as a potential fertilizer, not only as an NPK source, but also for its minimal amounts of heavy metals. The Chicago sludge with high levels of heavy metals, particularly Cd, appears unsuited as a fertilizer because of the plant's tendency to take up toxic levels of heavy metals.

No description available.

In order to determine which seaweeds were unable to survive in the stressed area and how far the effect of the effluent extended along the coast, various methods were applied and carried out over a two-year period between November 1982 and November 1984. Three major long-term studies took place. The first study was to determine the presence or absence of the seaweeds throughout (1) the entire study area and then (2) in areas broken up into sections with known distances from the outfalls. The second method involved statistical evaluations using point intersect methods and photography to produce information to determine species density, diversity, evenness, and to provide the information required to work with a number of ecological equations in the future. The third method incorporated a long-term survey on cleared plots in various sectors of the study area. The recolonization of the plots was recorded over a thirty-week period. (par. 1.1, p. 6-7)