Author: United States. Enviornmental Protection AgencyPublisher:
ISBN:
Category :
Languages : en
Pages : 116
Book Description
Water Pollution Control Research Series 13030 ELY 5.71-3. Bio-engineering Aspects of Agricultural Drainage, San Joaquin Valley, California. Nutrients from Tile Drainage Systems
Author: United States. Enviornmental Protection AgencyPublisher:
ISBN:
Category :
Languages : en
Pages : 116
Book Description
Techniques to Reduce Nitrogen in Drainage Effluent During Transport
Author: John W. WillifordPublisher:
ISBN:
Category : Drainage
Languages : en
Pages : 64
Book Description
Three methods to remove nitrates from the agricultural drainage water from the San Luis Service Area in California were investigated. One method was a theoretical evaluation of nitrate removal by algae during the transport of the drainage water in the San Luis Canal or during storage in the Kesterson Reservoir. The other methods were designed to promote anaerobic bacterial denitrification in a continuous flow of drainage water. One method used barley straw and the other water grass grown in shallow ponds as the carbon energy source. Under optimum conditions both of these last two methods reduced the nitrate -N concentration of the drainage water from a maximum of about 30 mg/l to less than 2 mg /l. The cost of nitrogen removal by the shallow grass plot systems, the most economical and feasible method investigated, was estimated.
Water Polution Control Research Series 13030 ELY 06/71-14: Bio-engineering Aspects of Agricultural Drainage, San Joaquin Valley, California, Denitrification by Anaerobic Filters and Ponds, Phase II.
Author: United States. Enviornmental Protection AgencyPublisher:
ISBN:
Category :
Languages : en
Pages : 52
Book Description
Possibility of Reducing Nitrogen in Drainage Water by on Farm Practices
Author: John W. WillifordPublisher:
ISBN:
Category : Drainage
Languages : en
Pages : 104
Book Description
The report is one of a series which presents the findings of intensive interagency investigations of practical means to control the nitrate concentration in subsurface agricultural waste water prior to its discharge into other water on such areas as the San Joaquin Valley. As a result of the application of large quantities of water to relatively slowly permeable stratified soils, the west side of the San Joaquin Valley now has large areas with groundwater at rootzone depths. Wherever subsurface drains have been installed to control this groundwater, the drainage effluent has had high nitrate concentrations. Large quantities of inorganic nitrogen fertilizers are applied annually and the assumption prevails that fertilizer is the major source of nitrates in the drainage water. The study was designed to evaluate this assumption and to derive, if possible, practical answers regarding the role of on-farm practices in controlling nitrate out-put from the agricultural lands. Examined are the nitrogen budget and methods for reducing the quantity of nitrates in the drainage effluent by modifications in type or use of fertilizers, practicespractives, or drainage techniques.
Monthly Catalog of United States Government Publications
Author: United States. Superintendent of DocumentsPublisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1194
Book Description
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index.
Water Pollution Control Research Sereis 13030 ELY 5/71-6: Removal of Nitrogen from Tile Drainage, a Summary Report
Author: United States. Environmental Protection AgencyPublisher:
ISBN:
Category :
Languages : en
Pages : 48
Book Description
Water Pollution Control Research Sereis 13030 ELY 08/71-9: Bio-engineering Aspects of Agricultural Drainage, SanJOaquin Valley, CAlifornia, the Effects of Agricultural Waste Water Treatment on Algal Bioassy Response
Author: United States. Enviornmental Protection AgencyPublisher:
ISBN:
Category :
Languages : en
Pages : 76
Book Description
Selected Water Resources Abstracts
Author: Proceedings, Workshop on Agricultural Non-point Source Water Pollution Control, September 16 and 17, 1974, Washington, D.C.
Author: Research Reporting Series
Author: Publisher:
ISBN:
Category : Environmental engineering
Languages : en
Pages : 556
Book Description