essai de plein champ

OBS: Des produits de préservation peuvent être ajoutés au bois ou au sol.

CONT: While most species of timber are susceptible to termite attack, the degree of susceptibility varies. Usually the durability of timbers against termites is assessed by what is known as the ""graveyard test"" in which stakes of standard dimension, of different species of timber, are arranged vertically in soil in a termite-infested site, with the top of the stakes protruding above ground like the headstones in a graveyard, and assessing the damage at intervals. Based on this, timbers are rated as susceptible, moderately resistant, and highly resistant.
OBS: Preservatives may be added to the timber or to the soil.