Data/hora: 09/06/2024 20:39:04

Biblioteca(s): 	Embrapa Unidades Centrais.	
Data corrente: 	05/10/1998	
Data da última atualização: 	29/07/2019	
Autoria: 	LIMA, J. M. de; ANDERSON, S. J.; PIERCE, F. J.; CURI, N.	
Afiliação: 	JOSÉ MARIA DE LIMA, Universidade Federal de Lavras - UFLA/Departamento Ciência do Solo; SHARON JILL ANDERSON, Earth Systems Science and Policy/CSUMB; FRANCIS JOHN PIERCE, Departament Crop and Soil Sciences/MSU; NILTON CURI, Universidade Federal de Lavras - UFLA/Departamento Ciência do Solo.	
Título: 	Improvement of properties, and water and clay movement in vertisol-amended sand columns.	
Ano de publicação: 	1998	
Fonte/Imprenta: 	Pesquisa Agropecuária Brasileira, Brasília, DF, v. 33, n. 7, p. 1171-77, jul. 1998	
Idioma: 	Inglês	
Notas: 	Título em português:  Melhoria de propriedades e movimento de água e argila em areia com adição de vertissolo.	
Conteúdo: 	Clay amendments may improve agricultural productivity of sandy soils by increasing nutrient-and water-holding capacities. The objective of this research was to determine the effect of Vertisol amendments on infiltration rate, available water capacity, cation exchange capacity, and clay and carbon migration in sandy soil colums. Acid-washed quartz sand was packed into PVC columns and covered with 10 cm of a Vertisol-sand mixture that contained 50, 100, 200 or 400 g kg of the Ap horizon of a Vertisol (fine, montmorillotic, thermic typic chromoxerests). Water was applied every other day, Leachate volume and dissolved organic carbon were measured biweekly. After 10 weeks, columns were selectioned into four layers, and chemical and physical properties were measured in each layer. Water retention, water capacity, and cation exchange capacity increased with increasing vertisol content. Dissolved organic C in column leachates also increased with increasing Vertison concentration and decreased with time. The 400 g kg Vertisol mixture had extremely low infiltration rate, possibly, because of surface crusting. The results of this study suggest that the 200 g kg Vertisol mixture had the overal physical and chemical properties most conductive to improved agricultural productivity with reasonable infiltration rate.	
Palavras-Chave: 	Retencao de agua; Solos arenosos; Vertisollos; Water retention.	
Thesaurus Nal: 	sandy soils.	
Categoria do assunto: 	--	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/44878/1/IMPROVEMENT-OF-PROPERTIES-AND-WATER-AND-CLAY-MOVEMENT.pdf	
Registro original: 	Embrapa Unidades Centrais (AI-SEDE)	
Exemplares: 	AI-SEDE - (7797-1) - UPE - AP - PP - 630.72081 - P474 -  - DIS