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8 recherche sur le mot-clé
'Echantillonnage systematique' 
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article/chapitre/communication
article/chapitre/communication
J. Holland ; L. Winder ; J. Perry | 1999
article/chapitre/communication
D. Legg ; K. Shufran ; K. Yeargan | 1985
article/chapitre/communication
P. Aubry ; D. Debouzie | 2000Many ecologists use two-dimensional systematic sampling to estimate mean density of individuals over the domain sampled. They usually calculate the variance of the mean as if the sample were a simple random sample, using the unbiased estimator u[...]
article/chapitre/communication
D. Chessel ; Pierre Donadieu | 1977
article/chapitre/communication
article/chapitre/communication
J. Holland ; J. Perry ; L. Winder | 1999The within-field spatial distribution of some common farmland arthropods from the Carabidae, Araneae and Collembola was assessed using two-dimensional grids of pitfall traps distributed across whole winter wheat fields. In the first year, the ex[...]
article/chapitre/communication
J. Thioulouse ; F. Houllier ; J. Onillon | 1985
