Data/hora: 08/06/2024 07:21:58

Biblioteca(s): 	Embrapa Unidades Centrais.	
Data corrente: 	19/07/2002	
Data da última atualização: 	23/05/2005	
Autoria: 	RITCHEY, K. D.; CERDAUSKAS, R. F.; SILVA, J. E. da; VILELA, L.	
Afiliação: 	CPAC.	
Título: 	Residual Effects of Potassium and Magnesium on Soybean Yield and on Disease Incidence in a Cerrado Dark-Red Latosol.	
Ano de publicação: 	1987	
Fonte/Imprenta: 	Pesquisa Agropecuária Brasileira, Brasília, v.22, n.8, p.825-832, ago. 1987.	
Idioma: 	Inglês	
Conteúdo: 	Soybean cultivar Paraná was grown in 1981-81 at EMBRAPA/CPAC, at Planaltina, Brazil, to determine the residual effects of leveis of K and Mg applied in 1975, upon the yield and seed quality and the severity of diseases caused by Phomopsis spp. and Colletotrichum truncatum on soybean stems. Decreasing yields and seed quality were associated with decreasing soil K and/or Mg levels. Foliar K levels; were directly related. to soil K levels while foliar Mg levels were inversely related to soil K. Foliar K content of 1.3% was sufficient for maximum seed production. Annual return of crop residue increased soil K and Mg, fofiar K and Mg, and cation exchange capacity but not soil organic matter. There was no difference among K treatments in arnount of fruiting structures of C. truncatum and Phomopsis spp. on soybean stems.

Palavras-Chave: 	Cofietotrichum truncatum; critical foliar At level; critical foliar K; crop residue; GIycine max.	
Thesagro: 	Phomopsis.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Unidades Centrais (AI-SEDE)	
Exemplares: 	AI-SEDE - (22674-1) - UPC - AP - -- - 63072081 - P474 -  - DIS