Results 261 to 270 of about 1,404,825 (297)

Rapid Measurement of Crop Canopy Cover

Agronomy Journal, 1990
AbstractStudies of photosynthesis, transpiration, water erosion, and wind erosion can require measurement of crop canopy cover, the percent of the soil surface covered by plant foliage. This study was conducted to evaluate the meter‐stick method and an electronic method of measuring canopy cover for accuracy, speed, and ease of use.
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Mulch Cover and Canopy Effect on Soil Loss

Transactions of the ASAE, 1988
ABSTRACT THE influence of simulated crop canopy cover, canopy height, and straw mulch cover on soil loss was studied in the laboratory. Runoff was significantly reduced by increased mulch cover but was unaffected by canopy cover or canopy height. However, soil loss was significantly reduced by increased mulch cover and also by canopy cover when the ...
null M. J. Khan, null E. J. Monke, null G. R. Foster   +2 more
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The Distribution and Canopy Cover of Woody Species

1995
This chapter analyses the distribution and importance of woody plants in the Sahel and Sudan zones in West Africa (SSWA), according to climatic zones (Sect. 2.1.2), landscape and geomorphological units (Sect. 2.1.3) and land-use types (Sect. 2.1.4). Canopy cover is utilised as the parameter indicating woody species’ importance (Sect. 2.1.5).
Henk Breman, Jan-Joost Kessler
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CANOPY COVER AND SHADE DETERMINATIONS IN RIPARIAN ZONES

Journal of the American Water Resources Association, 2005
: Three instruments commonly used to measure stream canopy cover were evaluated: the clinometer, a modified spherical convex densiometer Model A, and a hemispherical image system. The hemispherical image system was also used to model shade. At each of five locations throughout Oregon, canopy cover above a stream was measured from the center of the ...
Claudia E. Kelley, William C. Krueger
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Responses of crustose corallines to epiphyte and canopy cover

Journal of Phycology, 2000
Although a dense cover of epiphytes is generally considered to be harmful for some coralline algae (Corallinaceae, Rhodophyta), crustose corallines in the littoral zone seem to be preserved from bleaching when covered by canopy plants and epiphytes during summer.
Marcia A. De O. Figueiredo, Joanna M Kain ( Jones), Trevor A. Norton   +2 more
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Flow over a hill covered with a plant canopy

Quarterly Journal of the Royal Meteorological Society, 2004
AbstractWe develop an analytical model for atmospheric boundary‐layer flow over a hill that is covered with a vegetation canopy. The slope of the hill is assumed to be small enough that the flow above the canopy can be treated within the linear framework of Hunt. Perturbations to the flow within the canopy are driven by the pressure gradient associated
J. J. Finnigan, S. E. Belcher
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Evaporation Studies of Canopy-Covered On-Farm Reservoir

Journal of Irrigation and Drainage Engineering, 2012
AbstractThe present study used fifteen existing evaporation models that use flux gradient, energy balance, and mass transfer approaches to estimate the rate of evaporation from a regular-sized open on-farm reservoir (OFR). Statistical analysis was performed to screen the models.
Bharat C. Sahoo, Sudhindra N. Panda, Pravin Patil   +2 more
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Polygonal plot method for estimating the canopy‐spread cover of shrubs

Proceedings of the Annual Congresses of the Grassland Society of Southern Africa, 1971
An optical method for measuring canopy-spread cover of shrubs is described by means of an illustrated example. Boundaries of plots are hypothetical lines joining the centres of wholly visible shrubs or groups of shrubs surrounding the observation point.
G, Coetsee, DP, le Roux
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A Rapid Method for Estimating Arboreal Canopy Cover

Ecology, 1967
The per cent of a tract of savannah or woodland that is covered by tree canopy is measured by point quadrat sampling along a series of straight line transects using a vertical viewing tube.
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Assessment of In-situ Canopy Cover Measurement Techniques and GEDI Vertical Canopy Cover in the Indian Western Himalayan Region

Global Ecosystem Dynamics Investigation (GEDI) mission, operating from International Space Station, is a full-waveform LiDAR measuring vertical 3-dimensional structure of terrestrial ecosystems. The vertical canopy cover (CC) available from the GEDI L2B product has applications in forest ecosystem, forest health and climate change studies, and ...
Akshay Paygude, Hina Pande, Poonam Seth Tiwari   +2 more
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