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Mostrando ítems 11-20 de 407
A Química Ambiental no BrasilEnvironmental chemistry in Brasil
(Sociedade Brasileira de Química, 2002)
Radon emissions related to the granitic Precambrian shield in southern Brazil
(2013-03-01)
The equivalent uranium (eU) activity concentration was analysed in selected granite samples at several sites in Porto Alegre, Southern Brazil, to obtain information on the radon (222Rn) generation by the aquifer rock ...
Assessment of the genotoxicity of two agricultural residues after processing by diplopods using the Allium cepa assay
(2013-03-22)
Agroindustrial by-products and residues from treatment of sewage sludge have been recently recycled as soil amendments. This study was aimed at assessing toxic potential of biosolid, obtained from a sewage treatment plant ...
Anthropogenic influences on Cd, Cr,Cu, Ni, Pb and Zn concentrations in soils and sediments in a watershed with sugar cane crops at São Paulo State, Brazil
(2013-08-23)
The use of fertilizers NPK and amendments in sugar cane crops may change the heavy metals concentrations in soils, making them available for plants and, consequently, they can be transferred to the human food chain. This ...
Biochar chemistry in a weathered tropical soil: Kinetics of phosphorus sorption
(2021-04-01)
The phosphorus (P) chemistry of biochar (BC)-amended soils is poorly understood. This statement is based on the lack of published research attempting a comprehensive characterization of biochar’s influence on P sorption. ...
Biodegradation of eucalyptus urograndis wood by fungi
(Elsevier B.V., 2014-04-01)
We focused in selecting four fungi, naturally living in Eucalyptus sp. fields, for application in accelerating stump decay. The wood-rot fungi Pycnoporus sanguineus (Ps), Lentinus bertieri (Lb) and Xylaria sp. (Xa) were ...
Qualidade de solo submetido a sistemas de cultivo com preparo convencional e plantio direto.
(Pesquisa Agropecuária Brasileira, Brasília, v.41, n. 7, p.1185-1191, jul. 2006., 2006)
Small-scale method for the determination of selected organochlorine pesticides in soil
(1996-02-02)
A small-scale method was developed for the simultaneous determination of γ-HCH, heptachlor, aldrin, dicofol, mirex, endosulfan I, endosulfan II and endosulfan sulphate in soil. The extraction and clean-up steps were combined ...
Dynamics of the soil chemical properties in shifting cultivation systems in the tropics: a meta-analysis
(Wiley Blackwell Publishing, Inc, 2015-12)
The forest cultivation system (slash-and-burn or shifting cultivation) has contributed to the transformation of social systems since the early Neolithic period. Despite being considered by conservationists and public policy ...
Ammonia volatilization losses from surface-applied urea with urease and nitrification inhibitors
(2012-09-01)
Urease inhibitor (UI) and nitrification inhibitor (NI) have the potential to improve N-use efficiency of applied urea and minimize N losses via gaseous emissions of ammonia (NH 3) to the atmosphere and nitrate (NO3-) ...