Data/hora: 14/06/2024 03:58:03

Biblioteca(s): 	Embrapa Pantanal.	
Data corrente: 	16/08/1995	
Data da última atualização: 	16/08/1995	
Autoria: 	TYLER, E. J.; BUOL, S. W.; SANCHEZ, P. A.	
Título: 	Genetic associationm of properties of soil of an area in the Upper Amazon Basin of Peru.	
Ano de publicação: 	1978	
Fonte/Imprenta: 	Soil Science Society of America Journal, v.42, n.5, p.771-776, 1978.	
Idioma: 	Inglês	
Conteúdo: 	Soil properties of a 400-ha area in the Upper Amazon Basin of Peru were found to be rela-
ted to the nature of the parent material and to occurrence of defined geomorphic surfaces. The soils are developed from unconsolidated sandy to clay textured river sediments, origi-
nating in the Andes Mountains. The oldest surface is presently on the level hill tops. A surface which cuts the higher older surface and grades to the intervening valley floors of the same age and the recent flood plains is the youngest geomosphic surface. The typic
and Aquic Paleudults of the oldest surface generally have lower pH values, lower base saturation, and contain less weatherable minerals, but contain greater amounts of clay-
sized kaolinite than the soils of the younger surface. The soils of the erosional surface are 
Ultisols, Inceptisols or Alfisols. Genetic control of these soils appears to depend upon the location of an impervious layer which controls ground water depth. The alfisols, Inceptisols, and Entisols of the flood plain contain about 15% weatherable minerals and high amounts
of well crystalized smectite clay minerals that have probably undergone limited pedologic
alteration.	
Palavras-Chave: 	Associacao genetica; Bacia Amazonica; Genetic association; Tropical rainforest soil; Ulfisols; Upper Amazon Basin of Peru.	
Thesagro: 	Floresta Tropical; Solo Tropical.	
Thesaurus Nal: 	Alfisols.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Pantanal (CPAP)	
Exemplares: 	CPAP - (29228-1) - ADD - SP - -- - SP0890 -  - 0890 - DIS