Evaluation of the tortuosity parameter for forest soils to predict unsaturated hydraulic conductivityInforma UK Limited - Tập 6 - Trang 221-225 - 2001
Yoshiki Shinomiya, Kazunobu Takahashi, Masato Kobiyama, Jumpei Kubota
In order to accurately predict the unsaturated hydraulic conductivity for forest soils, we evaluated the tortuosity parameter for forest soils and investigated the relationships between the tortuosity parameter and parent materials and soil sampling depths. Undisturbed forest soil samples were taken from three parent material types: the granite group, Mesozoic-Paleozoic, and Quaternary. Samples ta...... hiện toàn bộ
Analysis of the relationship between DBH and crown projection area using a new modelInforma UK Limited - Tập 2 - Trang 237-242 - 1997
Koji Shimano
Relations of DBH-crown projection area (CPA) were studied for deciduous and coniferous trees with different models, one of which is newly derived this time. For DBH-CPA relations, a proposed power-sigmoid function was the most suitable one among four models because of its good fit and mechanistic meaning. This model contains the feature that CPA grows with the second power relation to DBH, and the...... hiện toàn bộ
Interception of photosynthetic photon flux density in a mangrove stand of Kandelia candel (L.) DruceInforma UK Limited - Tập 9 - Trang 205-210 - 2004
Md. Nabiul Islam Khan, Rempei Suwa, Akio Hagihara, Kazuharu Ogawa
The canopy structure and interception of photosynthetic photon flux density (PPFD) in a 10-year-old Kandelia candel (L.) Druce stand were investigated before and after artificial defoliation. Leaf and wood areas for different layers were measured through area-weight relationships of subsamples. PPFD was measured at specified heights before and after leaf clipping. The leaf area index (LAI) and woo...... hiện toàn bộ