| 单词 | even-aged |
| 释义 | > as lemmaseven-aged even-aged adj. (of woodland) consisting of trees that are approximately the same age; of or relating to such woodland; contrasted with uneven-aged. ΘΚΠ the world > plants > by growth or development > defined by habit > tree or woody plant > wood or assemblage of trees or shrubs > [adjective] > containing trees of same or different age or species even-aged1889 pure1889 all-aged1905 uneven-aged1905 1889 W. Schlich Man. Forestry I. 145 The cover overhead protects the soil and adjoining layers of air against sun and wind; in even aged woods more against sun, and in uneven aged woods more against wind. 1895 Trans. Royal Sc. Arboricultural Soc. 14 127 Advanced silviculture grows most crops on the even-aged principle. 1962 Times 1 Jan. 6/4 Trees in even-aged woods had gone down in swathes. 2003 B. D. Harvey et al. in P. J. Burton et al. Towards Sustainable Managem. Boreal Forest xi. 423 Each even-aged management zone..should be harvested over a period of 5–10 years while uneven-aged management zones could be actively managed over much longer time periods. < as lemmas |
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