989 resultados para special need
Resumo:
Special investigation of the Glenwood Resource Center Client Activity Clearing Account for the period January 1, 2009 through June 30, 2010
Resumo:
The occurrence of Umbric Ferralsols with thick umbric epipedons (> 100 cm thickness) in humid Tropical and Subtropical areas is a paradox since the processes of organic matter decomposition in these environments are very efficient. Nevertheless, this soil type has been reported in areas in the Southeast and South of Brazil, and at some places in the Northeast. Aspects of the genesis and paleoenvironmental significance of these Ferralsols still need a better understanding. The processes that made the umbric horizons so thick and dark and contributed to the preservation of organic carbon (OC) at considerable depths in these soils are of special interest. In this study, eight Ferralsols with a thick umbric horizon (UF) under different vegetation types were sampled (tropical rain forest, tropical seasonal forest and savanna woodland) and their macromorphological, physical, chemical and mineralogical properties studied to detect soil characteristics that could explain the preservation of high carbon amounts at considerable depths. The studied UF are clayey to very clayey, strongly acidic, dystrophic, and Al-saturated and charcoal fragments are often scattered in the soil matrix. Kaolinites are the main clay minerals in the A and B horizons, followed by abundant gibbsite and hydroxyl-interlayered vermiculite. The latter was only found in UFs derived from basalt rock in the South of the country. Total carbon (TC) ranged from 5 to 101 g kg-1 in the umbric epipedon. Dichromate-oxidizable organic carbon represented nearly 75 % of TC in the thick A horizons, while non-oxidizable C, which includes recalcitrant C (e.g., charcoal), contributed to the remaining 25 % of TC. Carbon contents were not related to most of the inorganic soil variables studied, except for oxalate-extractable Al, which individually explained 69 % (P < 0.001) of the variability of TC in the umbric epipedon. Clay content was not suited as predictor of TC or of the other studied C forms. Bulk density, exchangeable Al3+, Al saturation, ECEC and other parameters obtained by selective extraction were not suitable as predictors of TC and other C forms. Interactions between organic matter and poorly crystalline minerals, as indicated by oxalate-extractable Al, appear to be one of the possible organic matter protection mechanisms of these soils.
Resumo:
Contact list for Iowa Department of Transportation
Resumo:
Special investigation of the Bremer County Sheriff’s Office for the period January 1, 2009 through March 17, 2011
Resumo:
Report on a special investigation of the Webster County Metropolitan Law Enforcement Telecommunications Board for the period July 1, 2006 to January 28, 2011
Resumo:
Special investigation of the City of Denison Fire Department for the period July 1, 2005 through March 31, 2010
Resumo:
Report on a special investigation of UNItix, the University of Northern Iowa’s centralized ticketing office, for the period August 1, 2008 through August 31, 2010
Resumo:
Report on a special investigation of the Clay Central-Everly Community School District for the period July 1, 2005 through November 30, 2010
Resumo:
Report on a special investigation of the City of Conway for the period October 24, 2002 through March 8, 2011
Resumo:
Report on a special investigation of the City of Melcher-Dallas for the period July 1, 2007 through June 30, 2010
Resumo:
Report on a special investigation of the Clarke Community School District cheerleading account for the period August 19, 2008 through June 30, 2011
