Data/hora: 06/06/2024 10:24:26

Biblioteca(s): | Embrapa Gado de Corte.
Data corrente: | 20/08/1999
Data da última atualização: | 24/08/2011
Autoria: | NILAKHE, S. S.; MARTIN, P. B.; VALERIO, J. R.; KOLLER, W. W.; SOUZA FILHO, J. A. G. de; SILVA, A. A. da.
Afiliação: | EMBRAPA. Centro Nacional de Pesquisa de Gado de Corte (Campo Grande, MS).
Título: | Sampling plans for spittlebug eggs in pastures of Brachiaria decumbens.
Ano de publicação: | 1984
Fonte/Imprenta: | Pesquisa Agropecuaria Brasileira, Brasilia, v.19, n.8, p.935-941, ago. 1984.
Idioma: | Inglês
Conteúdo: | Sampling study of spittlebug eggs in pastures of Brachiaria decumbens was  conducted by using a sample unit of 15 x 15 cm. The number of samples required for a certain level of precicion was inversely proportional to population density. A crude estimate of number os samples necessary for 10, 15 and 20% of precision were 133,59 and 33, respectively. A study of sampling variation showed that differences between plots were much more important than the block differences; therefore plot to plot variation must be considered wwhile sampling spittlebug eggs. The distribution  pattern of numbers of eggs per 225cm2 of pasture fitted the negative binomial series. The sequential sampling plan presented here would reduce the sampling time over the conventional (fixed sample numbers) sampling.
Palavras-Chave: | Amostra; Egg; Spittlebugs.
Thesagro: | Brachiaria Decumbens; Cigarrinha das Pastagens; Deois Flavopicta; Ovo; Zulia Entreriana.
Thesaurus Nal: | sampling.
Categoria do assunto: | --
Registro original: | Embrapa Gado de Corte (CNPGC)
Exemplares: | CNPGC - (4691-1) - UPC - AP - PP - 630.5 -  - 630.5 - DIS