Data/hora: 22/06/2024 02:35:08

Biblioteca(s): 	Embrapa Solos.	
Data corrente: 	22/11/2002	
Data da última atualização: 	22/11/2002	
Autoria: 	SANTOS, M.	
Título: 	Pedogenesis of luvisolic soils in East-Central Saskatchewan.	
Ano de publicação: 	1984	
Fonte/Imprenta: 	SasKatoon: University of Saskatchewan, 1984.	
Páginas: 	169p.	
Idioma: 	Inglês	
Notas: 	Tese Doutorado.	
Conteúdo: 	The pedogenesis of three gray luvisol soils developed from glacial till under boreal forest in east-chemical Saskatchewa was studied. A compreehensive approach including morphological, micro-morphological, chemical, mineralogical and quantitative reconstructions based on X-ray fluorescence spectroscopic analyses and stable index minerals was used to determine the nature and degree of soil forming processes. All profiles had well developed LFH-Ae-Bt-C horizon sequences, with solum thicknesses of 62 and 88 cm, respectively, for Profiles 1 and 2 on till with 8-10& CaCO3 equivalent; and 15 cm for Profile 3 on till with 58% CaCO3 equivalent and a much higher proportion of dolomite. Particle size distributions indicated a physical breakdown of sand to silt in Ae horizons, the translocation of clay from the Ae to the Bt horizons, and a general uniformity of material with depth in Profiles 1 and 2. A constancy in quartz:ZrO2 ratios with depth further supported the uniformity of materials in Profiles 1 and 2, and indicated that the variability of Profile 3 prevented its use in quantitative estimates of soil formation. Reconstructions using mainly quartz as an index allowed quantitative estimates of sand to silt and coarse clay to fine clay weathering processes, the magnitude of the losses of weatherable minerals and elements and the concentration of resistant minerals in the solum. Sand-sized-Ca-feldspars were more susceptible to weathering than either Na or K-feldspars. There was a considerable loss of clay from........	
Palavras-Chave: 	Minerologia.	
Thesagro: 	Análise Química; Solo.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Solos (CNPS)	
Exemplares: 	CNPS - (4065-1) - ADD - TS - -- - 84013 - SAN/84 - 1997.00511 - DIS