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Biological wastewater treatment
1980
Grady, C. P. Leslie | Lim, Henry C.
[Water and vegetable contamination by heavy chemical elements]
1980
Nova S, A.R.
[Crisis of the environment and the future of human being [pollution]]
1980
Capurro S, L.F. (Universidad de Chile, Santiago. Facultad de Ciencias Veterinarias)
[Pesticides of major effect [pollution]]
1980
Tapia Z, R. (Universidad de Chile, Santiago. Facultad de Ciencias Quimicas)
Biochemical indicators of subsurface pollution
1980
Dermer, Otis C. (Otis Clifford) | Curtis, Vivian S. | Leach, Franklin R.
[Policy and administration of the enviromment in Chile]
1980
Katz, R.
[General aspects of air pollution and its effect in agriculture]
1980
Silo A, C. (Instituto de Salud Publica, Santiago (Chile))
Microbiological aspects of pollution control
1980
Dart, R. K. | Stretton, R. J.
An analysis of trade-offs in food production costs and soil conservation by an interregional programming and multigoal model
1980
Saygideger, O. | Heady, E.O. | Vocke, G.F. | Sposito, V.A. (Iowa State Univ., Ames (USA))
This analysis measures trade-offs between soil loss and food production costs. It is made by means of multigoal interregional programming model. The trade-off curve is derived by means of the prior weighing technique. The results indicate that soil loss from agricultural land can be decreased considerably with very little increase in cost in efficiency in food production. However, the trade-off curve has a "corner" in it, and further reductions in soil loss give rise to sharp increases in food production costs. As higher costs are assigned soil loss, important shifts take place in the interregional patterns of crop production and land use. Also, further decreases in soil loss and increases in food production costs raise food prices for consumers.
Show more [+] Less [-]Significance of leaf surface characteristics in plant responses to air pollution
1980
Varshney, C.K. | Garg, K.K. (Jawaharlal Nehru Univ., New Delhi (India). School of Environmental Sciences)
Plant responses to air pollution were found to vary with type of leaf vesture. Considerable reduction in leaf area, leaf biomass, total plant biomass and chlorophyll content was observed in plants having pilose or pubescent leaf surface as compared to plants with glabrescent leaf surface. The study shows the importance of leaf vesture in determining response of plants to air pollution.
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