Results 1 to 10 of about 90,034 (280)

Estimating Changes in Leaf Area, Leaf Area Density, and Vertical Leaf Area Profile for Mango, Avocado, and Macadamia Tree Crowns Using Terrestrial Laser Scanning [PDF]

Remote Sensing, 2018
Vegetation metrics, such as leaf area (LA), leaf area density (LAD), and vertical leaf area profile, are essential measures of tree-scale biophysical processes associated with photosynthetic capacity, and canopy geometry.
Dan Wu, Stuart Phinn, Kasper Johansen, Andrew Robson, Jasmine Muir, Christopher Searle   +5 more
doaj   +10 more sources

Ground-based estimation of leaf area index and vertical distribution of leaf area density in a Betula ermanii forest [PDF]

Silva Fennica, 2009
We developed a ground-based method for estimating leaf area index (LAI) and vertical distribution of leaf area density (LAD) for two Betula ermanii plots, combining an allometric method for tree leaf area with the MacArthur–Horn (MH) method using a ...
Sumida, Akihiro, Nakai, Taro, Yamada, Masahito, Ono, Kiyomi, Uemura, Shigeru, Hara, Toshihiko   +5 more
doaj   +5 more sources

Effect of cover crops on maize-velvet leaf competition: leaf area density and light interception

Acta Agriculturae Slovenica, 2016
Cover crops influence on canopy structure and light interception of maize (Zea mays L.) and velvetleaf (Abutilon theophrasti Medik), was studied in a field experiment. Treatments included planting of bean (Phaseolus vulgaris L.), soybean (Glycine max (L.)
faezeh zaefarian, zahara shakibafar, Mohammad Rezvani, Hamid SALEHIAN   +3 more
doaj   +6 more sources

Research on Leaf Area Density Detection in Orchard Canopy Using LiDAR Technology

Applied Sciences
Precise detection of canopy parameters is vital as it offers essential information for pest management in orchards. Among these parameters, leaf area density stands out as a key indicator of orchard canopies.
Mingxiong Ou, Yong Zhang, Zhiyong Yu, Jiayao Zhang, Weidong Jia, Xiang Dong   +5 more
doaj   +3 more sources

Joint Estimation of Leaf Area Density and Leaf Angle Distribution Using TLS Point Cloud for Forest Stands

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
The foliage density $(u_l)$ and the leaf angle distribution (LAD) are important properties that impact radiation transmission, interception, absorption and, therefore, photosynthesis.
Ameni Mkaouar, Abdelaziz Kallel, Zouhaier Ben Rabah, Thouraya Sahli Chahed   +3 more
doaj   +2 more sources

Orchard variable-rate spraying method integrating GNSS and wind-excited audio-conducted leaf area density [PDF]

Frontiers in Plant Science
IntroductionConventional air-assisted sprayers used in orchards often suffer from excessive pesticide waste, high residue levels, and uneven droplet distribution on fruit tree canopies.
Hangxing Zhao, Hangxing Zhao, Hangxing Zhao, Shenghui Yang, Shenghui Yang, Shenghui Yang, Wenwei Li, Wenwei Li, Han Feng, Han Feng, Shijie Jiang, Shijie Jiang, Weihong Liu, Weihong Liu, Jingbin Li, Yongjun Zheng, Yongjun Zheng, Songchao Zhang   +17 more
doaj   +2 more sources

Leaf density explains variation in leaf mass per area in rice between cultivars and nitrogen treatments [PDF]

Annals of Botany, 2016
Leaf mass per area (LMA) is an important leaf trait; however, correlations between LMA and leaf anatomical features and photosynthesis have not been fully investigated, especially in cereal crops. The objectives of this study were (a) to investigate the correlations between LMA and leaf anatomical traits; and (b) to clarify the response of LMA to ...
Dongliang Xiong, Shaobing Peng, Jianliang Huang   +2 more
exaly   +3 more sources

Retrieval of effective leaf area index (LAIe) and leaf area density (LAD) profile at individual tree level using high density multi-return airborne LiDAR

International Journal of Applied Earth Observation and Geoinformation, 2016
Abstract As an important canopy structure indicator, leaf area index (LAI) proved to be of considerable implications for forest ecosystem and ecological studies, and efficient techniques for accurate LAI acquisitions have long been highlighted. Airborne light detection and ranging (LiDAR), often termed as airborne laser scanning (ALS), once was ...
Yi Lin
exaly   +3 more sources

Estimating Leaf Area Density of Individual Trees Using the Point Cloud Segmentation of Terrestrial LiDAR Data and a Voxel-Based Model

Remote Sensing, 2017
The leaf area density (LAD) within a tree canopy is very important for the understanding and modeling of photosynthetic studies of the tree. Terrestrial light detection and ranging (LiDAR) has been applied to obtain the three-dimensional structural ...
Shihua Li, Leiyu Dai, Hongshu Wang, Yong Wang, Ze He, Sen Lin   +5 more
doaj   +3 more sources

Functional traits of tree saplings and adults in a tropical cloud forest restoration context

Botan‪ical Sciences, 2020
Background: The use of tree species’ functional traits is a promising approach in forest restoration. However, some traits may change during ontogeny. Questions: Does intraspecific variation in functional traits occur between sapling and adult stages?
Guadalupe Williams-Linera, Avril Manrique-Ascencio   +1 more
doaj   +1 more source