Dimensionamento do número de amostras para avaliação da fertilidade do solo
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Data
2011-01-01
Autores
Rozane, Danilo Eduardo [UNESP]
Romualdo, Liliane Maria
Centurion, Jose Frederico [UNESP]
Barbosa, Jose Carlos [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Estadual de Londrina (UEL)
Resumo
The determination of the amount of sample units that will compose the sample express the optimization of the workforce, and reduce errors inherent in the report of recommendation and evaluation of soil fertility. This study aimed to determine in three systems use and soil management, the numbers of units samples design, needed to form the composed sample, for evaluation of soil fertility. It was concluded that the number of sample units needed to compose the composed sample to determination the attributes of organic matter, pH, P, K, Ca, Mg, Al and H+Al and base saturation of soil vary by use and soil management and error acceptable to the mean estimate. For the same depth of collected, increasing the number of sample units, reduced the percentage error in estimating the average, allowing the recommendation of 14, 14 and 11 sample in management with native vegetation, pasture cultivation and corn, respectively, for a error 20% on the mean estimate.
Descrição
Palavras-chave
Soil simpling, units samples, Corn, Panicum, native vegetation, horizontal variability
Como citar
Semina-ciencias Agrarias. Londrina: Universidade Estadual de Londrina (UEL), v. 32, n. 1, p. 111-117, 2011.