References of "Grayet, J.-P"
     in
Bookmark and Share    
Full Text
See detailPrécision des échantillonnages relatifs à la répartition des arbres par catégories de grosseur.
Grayet, J.-P.; Rondeux, Jacques ULg

Book published by Faculté des Sciences Agronomiques (1980)

The precision of samplings which concern the distribution of trees by girth classes is studied in various forest types (unevenaged and evenaged hardwood stands, evenaged coniferous stands). When sampling ... [more ▼]

The precision of samplings which concern the distribution of trees by girth classes is studied in various forest types (unevenaged and evenaged hardwood stands, evenaged coniferous stands). When sampling intensities of 1 to 10 % (plots of 10 ares), the estimated semi confidence intervals at a 95 % probability level are varying from 10 to 2 %. In coniferous forests (plots of 4 ares) for the same area limits and sampling intensities the semi confidence intervals are varying from 4 to 1 %. [less ▲]

Detailed reference viewed: 7 (0 ULg)
Full Text
See detailPrincipes et applications d'inventaires forestiers par parcelles de gestion
Rondeux, Jacques ULg; Grayet, J.-P.

Book published by Faculté des Sciences Agronomiques (1978)

Conventional sampling systems cannot localize information by smallforest units such as a compartment or a stand unless we increase the sampling intensity and the cost too. When management becomes more ... [more ▼]

Conventional sampling systems cannot localize information by smallforest units such as a compartment or a stand unless we increase the sampling intensity and the cost too. When management becomes more intensive the "unit area inventory" based upon sampling inside compartments is considered for giving in-place information about individual stand units (inventory) and their specific treatment. The authors present some procedures they have used in intensively managed forests. Individual stands are identified and mapped, then estimates are made of volume, species, structure by means of temporary plots or angle count samples systematically located or left to judgment. Computer programs have been written in order to assist the manager in applying such a type of inventory. [less ▲]

Detailed reference viewed: 12 (0 ULg)