Data/hora: 25/06/2024 06:52:46

Biblioteca(s): 	Embrapa Amazônia Ocidental; Embrapa Mandioca e Fruticultura.	
Data corrente: 	27/04/2000	
Data da última atualização: 	27/04/2000	
Autoria: 	HATHEWAY, W. H.; WILLIAMS, E. J.	
Afiliação: 	Rockefeller Foundation, Agricultural Field Staff, and the Institute of Statistics Raleigh, North Carolina, U.S.A.	
Título: 	Efficient estimation of the relationship between plot size and the variability of crop yields.	
Ano de publicação: 	1958	
Fonte/Imprenta: 	Biometrics, p.207-222, 1958.	
Idioma: 	Inglês	
Conteúdo: 	The optimum size of plot in field experimentation depends on the relationship between fixed costs and costs varying with number of units, and on soil variability. Perhaps the most useful measure of soil hetero geneity yet devised is that of Smith [1938], who showed empirically that the logarithm of the variance between plots of a given size was linearly related to the logarithm of the size of the plot. In the presentpaper we consider only the relationship between size and variability. The objects of the paper are, firstly, to show efficient estimates of the constants in this relationship may be determined, and secondly, to illustrate a general method of determining efficient linear estimates when the data are, as in the present instance, correlated and of unequal variability. 	
Palavras-Chave: 	Culturas.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Mandioca e Fruticultura (CNPMF)	
Exemplares: 	CNPMF - (17802-1) - ADD - SP - -- - S664 -  - S664 - DIS
CPAA - (25530-1) - ADD - SP - PP - S0220 -  - S0220 - DIS