| УДК |
Аннотация: In recent years there have been many advances towards the practice of forestry in British Columbia. Among these have been attampts at regulating the annual cut in accordance with the principles of sustained yield. This has drawn attention to methods of assessing the growth potentialities of logged lands. This report gives a practical method for estimating the site-quality of logged land in terms of site index and of forest associations, either of which may be of value to the forester. More field data have gone into the preparation of a method for predicting forest associations than into the site-index method, and the former has a higher degree of success in prediction. Four site classes, however, have been predicted in terms of site index as compared to three forest associations. It should be stressed that this method of estimating site-quality, by means of stump diameter-growth measurements, is not an exact one, but merely serves as a rough guide toward the mapping of logged land.
Экземпляры всего: 1
ИЛ-Иф (1)
Свободны: ИЛ-Иф (1)