Achterstallig onderhoud en werkgelegenheid in bossen en natuurterreinen
Thinning trees by form and defects (tree-class thinnings) and practical or free thinning (according to the surrounding trees) were unsuitable for comparing thinning methods by the subjectivity of the involved tree classification methods.A thinning criterion based on 'top height' and 'stem number' proved objective. By assuming different ratios betwe...