Data/hora: 24/09/2024 12:15:59

Biblioteca(s): 	Embrapa Meio-Norte.	
Data corrente: 	06/07/2007	
Data da última atualização: 	06/07/2012	
Autoria: 	SILVA, P. S. L. e; SILVA, K. M. B. e; FREIRE FILHO, F. R.	
Título: 	Effect of weed control in corn with cowpea intercropping on soil chemical characteristics.	
Ano de publicação: 	2006	
Fonte/Imprenta: 	In: CONGRESSO NACIONAL DE FEIJÃO-CAUPI, 1.; REUNIÃO NACIONAL DE FEIJÃO-CAUPI, 6., 2006, Teresina. Tecnologias para o agronegócio: anais. Teresina: Embrapa Meio-Norte, 2006.	
Descrição Física: 	1 CD-ROM.	
Série: 	(Embrapa Meio-Norte. Documentos, 121).	
Idioma: 	Inglês	
Conteúdo: 	Weeds interfere with nutrient absorption by crops. Therefore, there has been interest in knowing the effects of weeds on soil chemical characteristics, aiming at better fertilization management in order to save fertilizers and reduce pollution problems. The objective of this work was to evaluate the effects of weed control on soil pH and soil Ca, Mg, K, Na, P, and SB contents (sum of bases), when the soil is cultivated with corn. The experiment was conducted as random blocks with 5 replicates and split-plots. Four cultivars (BA 8512, BA 9012, EX 4001 and EX 6004) were grown with weed control (two hoeing operations, or intercropped with cowpea, Vigna unguiculata (L.) Walp.) or without weed control. The weed control measures were assigned to subplots, while cultivars were assigned to plots. Ten weed species predominated in the experiment. The weeding operations increased P content, but reduced S content, while the lack of weed control increased pH (in water). These effects were independent from the cultivars evaluated, which were not different with regard to their effects on soil characteristics.	
Thesagro: 	Capina; Nutriente; Variedade; Vigna Unguiculata; Zea Mays.	
Categoria do assunto: 	F Plantas e Produtos de Origem Vegetal	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/61822/1/FT08Silva.pdf	
Registro original: 	Embrapa Meio-Norte (CPAMN)	
Exemplares: 	CPAMN - (20567-1) - UPC - AA - PP - S 38/07 -  - 2007.00038 - DIS