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The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

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Journal Article

Статья в журнале

Sediment Inventory and Phosphorus Fractions for Water Conservation Area Canals in the Everglades  [2006]

Diaz, O.A.; Daroub, S.H.; Stuck, J.D.; Clark, M.W.; et al.

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Nutrient loading from the Everglades Agricultural Area and nearby urban communities plus water flow rate and canal size have significantly influenced the amount of sediment and phosphorus (P) pools stored in the Water Conservation Area (WCA) canals in the Everglades. A study was conducted to characterize the potential impact that sediments might have on the overlying water column by conducting an inventory of total P (TP) and major P forms in sediments of all major canals in the WCAs. Sediment samples and sediment depth measurements were taken at transects every 1.6-km along all canals reaches. A total sediment volume of about 6.8 million m³, with a P mass of approximately 1808 Mg was estimated to be stored within all WCA canals, with the eastern canal accounting for 71% of the total sediment volume and about half of TP mass. Phosphorus fractions associated with Ca- and Mg-compounds and residual organic P (Po) were the dominant forms stored in these canals, with the greatest P mass observed in the western side of the WCAs. These results indicates that >80% of the TP mass stored in surface sediments in the WCAs is fairly stable, and represent an important long-term sink for P. Canal sediments from the eastern side of the WCAs were low in bulk density, highly organic and more susceptible to resuspension and transport during strong drainage events. These sediments showed higher Fe- and Al-bound P and organic-bound P fractions, making them more susceptible to
changes in the redox potential of the sediments that could result in the long-term release of Fe-bound P to the overlying water column.
Журнал
Soil Science Society of America journal
ISSN : 0361-5995

Библиографическая информация

Язык:
English
Тип:
Journal Article
В АГРИСе с:
2013
Том:
70
Выпуск:
3
Стартовая страница:
863
Конечная страница:
871
Все названия:
"Sediment Inventory and Phosphorus Fractions for Water Conservation Area Canals in the Everglades"@eng
Другое:
"Includes references"
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Библиографическая информация

Язык:
English
Тип:
Journal Article
В АГРИСе с:
2013
Том:
70
Выпуск:
3
Стартовая страница:
863
Конечная страница:
871
Все названия:
"Sediment Inventory and Phosphorus Fractions for Water Conservation Area Canals in the Everglades"@eng
Другое:
"Includes references"