نتایج جستجو برای: three mowing heights including 2

تعداد نتایج: 4125365  

Journal: :Remote Sensing 2015
Xiliang Ni Yuke Zhou Chunxiang Cao Xuejun Wang Yuli Shi Taejin Park Sungho Choi Ranga B. Myneni

Spatially-detailed forest height data are useful to monitor local, regional and global carbon cycle. LiDAR remote sensing can measure three-dimensional forest features but generating spatially-contiguous forest height maps at a large scale (e.g., continental and global) is problematic because existing LiDAR instruments are still data-limited and expensive. This paper proposes a new approach bas...

2018

Stampfli A. 1992. Effects of mowing and removing litter on reproductive shoot modules of some plant species in abandoned meadows on Monte San Giorgio. Bot. Helv. 102: 85-92. Reproductive shoot modules have been counted in a permanent plot experiment on Monte San Giorgio (Southern Switzerland) since 1988. The 8 species presented here, including the dominant grass (Molinia arundinacea) and seven ...

2017

Stampfli A. 1992. Effects of mowing and removing litter on reproductive shoot modules of some plant species in abandoned meadows on Monte San Giorgio. Bot. Helv. 102: 85-92. Reproductive shoot modules have been counted in a permanent plot experiment on Monte San Giorgio (Southern Switzerland) since 1988. The 8 species presented here, including the dominant grass (Molinia arundinacea) and seven ...

Journal: :Remote Sensing 2022

Grassland management practices and intensities are key factors influencing the quality balance of their provisioning regulating ecosystem services. Most European temperate grasslands exploited through mowing, grazing, or a combination both in relatively small units. Grazing mowing can however not be considered equivalent because first is gradual selective second not. In this study, aim to diffe...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت دبیر شهید رجایی - دانشکده علوم انسانی 1392

the main purpose of the present study was to investigate the relationship between listening proficiency and metacognitive listening strategies awareness among low, mid, and highly self-regulated students. three hundred and seventy one efl students participated in this study (all grade 3 and 4 high-school students who were studying in khansar in academic year 1391-92). to gather the data, three ...

2014
Anja Schmithals Norbert Kühn Anil Shrestha

North American prairie vegetation has been a role model for designing highly attractive plantings for German urban green spaces for the past decade. In combination with gravel mulch top layers on planting sites and non-selective maintenance techniques like mowing or burning, prairie plantings are considered to be cost-effective and low-maintenance. This study was undertaken to assess the impact...

2017
Mikkel Kragh Peter Christiansen Morten Stigaard Laursen Morten Larsen Kim Arild Steen Ole Green Henrik Karstoft Rasmus Nyholm Jørgensen

In this paper, we present a multi-modal dataset for obstacle detection in agriculture. The dataset comprises approximately 2 h of raw sensor data from a tractor-mounted sensor system in a grass mowing scenario in Denmark, October 2016. Sensing modalities include stereo camera, thermal camera, web camera, 360 ∘ camera, LiDAR and radar, while precise localization is available from fused IMU and G...

2005
C. Milesi C. D. Elvidge J. B. Dietz B. T. Tuttle R. R. Nemani

Lawns are ubiquitous in the American urban landscapes. However, little is known about their impact on the carbon and water cycles at the national level. The limited information on the total extent and spatial distribution of these ecosystems and the variability in management practices are the major factors complicating this assessment. In this study, relating turf grass area to fractional imper...

2001
MARILYNN R. BARTELS MARK V. WILSON

Sidalcea nelsoniana is a perennial herb native to wetland prairies of the Willamette Valley, Oregon that is listed as threatened under the federal Endangered Species Act and by the State of Oregon. Because of extreme habitat loss and encroachment by woody species and weedy pest plants in remaining wetland prairies, conservation of S. nelsoniana will likely require active management of the habit...

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