Data/hora: 08/06/2024 18:05:52

Biblioteca(s): 	Embrapa Solos.	
Data corrente: 	22/11/2002	
Data da última atualização: 	22/11/2002	
Autoria: 	RESCK, D. V. S.	
Título: 	Effect of crop residues and liming on soil physical and chemical properties of tropical and temperature soils.	
Ano de publicação: 	1986	
Fonte/Imprenta: 	s.l.: Purdue University, 1986.	
Páginas: 	264p.	
Idioma: 	Português	
Notas: 	Tese Doutorado.	
Conteúdo: 	Fertilization and liming. as well as the return of crop residues to the soil, are essential to prevent a rapid loss of organic carbon content from cultivated soils. Tropical and temperature soils will likely respond differently to these amendments. An incubation study was designed to test the effects of corn, soybean or no residue additions, with or whithout the addition of lime, on soil physical and chemical properties of two oxisols (virgin and cultivated) from the cerrados region of Brazil and a Mollisol and Inceptisol from Indiana. The soil properties measured at 0, 10, 20, 30, 60 and 90 days of incubation included organic carbon, pH, cation exchange capacity (CEC), water-stable aggregation, and water retention at -10, -33, and -100 kPa water potential. Carbon dioxide evolution awas measured at short time intervals throughout the 90 days of incubation. The decrease in organic carbon content with time was in the order Inceptisol > Mollisol > Cultivated Oxisol > Virgin Oxisol. Microbial activity, as measured by CO2 evolution rartes, was almost twice as great in the temperature soils as in the Tropical soils. The additions of lime and crop residues tended to decrease water retention capacity of the Virgin Oxisol, whereas the no residue treatment was not affected by lime. Lime did not affect water retention for any crops in the cultivated oxisol or in the Mollisol. Time of incubation had a positive effect on soil water-stable aggregation. Lime decreased water-stable aggregation in the Virgin Oxisol when no......	
Categoria do assunto: 	--	
Registro original: 	Embrapa Solos (CNPS)	
Exemplares: 	CNPS - (4022-1) - ADD - TS - -- - 86007 - RES/86 - 1997.00416 - DIS