DATA:      Batterink et Wijffels (1983)
DIRECTORY: \CANOCO\SAMPLES\PERMUTIO\DUNETEST
PROBLEM:   Determine the significance of differences in vegetation between
           management types
ILLUSTRATION OF:
+ A permutation test
+ A partial test
+ How to account for other variables in a permutation test
+ How an F-ratio is calculated
_______________________________________________________________________________
FILE TYPE    |  FILE NAME    |         DESCRIPTION
-------------+---------------+-------------------------------------------------
 SPECIES     | table01.dta   | see DUNEBOOK example
ENVIRONMENT  | table02.dta   | see DUNEBOOK example
 PROJECTS    | manage1.con   | test of differences among management types
             | manage2.con   | test of differences among management types 
             |               |  after accounting for soil characteristics
             | manage3.con   | test of differences among management types 
             |               |  after accounting for soil characteristics
             |               |  and manure
             | soil1.con     | test of effect of soil characteristics 
             |               |  (A1 thickness and moisture) on the vegetation
             | soil2.con     | test of effect of soil characteristics after
             |               |  accounting for management types
             | manasoil.con  | test of effect of management and soil jointly
-------------+---------------+-------------------------------------------------

Batterink, M. & Wijffels, G. (1983) Een vergelijkend vegetatiekundig onderzoek
naar de typologie en invloeden van het beheer van 1973 tot 1982 in
de Duinweilanden op Terschelling. Report Agricultural University, 
Department of Vegetation Science, Plant Ecology and Weed Science. Wageningen.
101 pp.