Results 251 to 260 of about 91,258 (295)

Light interception, photosynthesis and crop productivity

Outlook on Agriculture, 1982
For a crop plant, it is suggested that photosynthetic productivity is governed by the capacity for carbon dioxide fixation available at any given time; by a host of environmental and physiological factors which may limit photosynthesis to less than capacity; and by the rate at which assimilate is partitioned into useful yield organs.
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Canopy Structure, Light Interception, and Photosynthesis in Maize

Agronomy Journal, 2003
The amount and distribution of leaf area and leaf angles in a crop canopy determine how photosynthetically active radiation (PAR) is intercepted and consequently influences canopy photosynthesis and yield. Factors such as plant shape, plant populations, and row width will affect these leaf distributions and can occur in an almost infinite number of ...
D. W. Stewart, C. Costa, L. M. Dwyer, D. L. Smith, R. I. Hamilton, B. L. Ma   +5 more
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Analysis of Light Interception by Single Plants

Annals of Botany, 1981
The two traditionally distinct treatments of growth analysis, using either relative growth rate (RGR) or crop growth rate (CGR), can be integrated in a single treatment in which RGR is a component of CGR. CGR can alternatively be analysed as the product of incident light receipt, efficiency of light interception (as determined by leaf area index and ...
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Beam light interception by twisted leaf surfaces

Agricultural Meteorology, 1976
Abstract Formulae allowing the calculation of the shadow projected by a twisted leaf surface (helicoid) on a plane perpendicular to the sun's rays have been presented. The effect of leaf twisting on beam light interception in plant canopies is discussed. The effect of leaf twisting is similar to the effect of an increased erectness of the canopy.
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Orchard level simulation of fruit tree light interception

Acta Horticulturae, 2017
Several functional-structural plant models have been built for studying fruit trees, most of which focus on single trees. Simulating an entire orchard has been a difficulty due to two challenges: one is in computing, limited by processor capability and memory capacity, as well as the sequential nature of conventional approaches; the other is the ...
Han, Liqi, Hanan, J., Costes, Evelyne
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TOWARDS A 3D STRUCTURAL TOMATO MODEL FOR CALCULATING LIGHT INTERCEPTION

Acta Horticulturae, 2011
A number of physiological tomato models have been proposed the last decades, their main challenge being the correct simulation of fruit yield. For this, an accurate simulation of light interception, and thus photosynthesis, is of primary importance.
Sarlikioti, V., Marcelis, L.F.M., de Visser, P.H.B.   +2 more
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Modeling light-interception for a cotton population model

1998
Light-interception by crops has been intensively studied since the early 1960s. Simple models of light interception for single plant, crop-rows, and for continuous canopy have been developed. More complex models, using crop geometry, have also been investigated and some of the studies tried to model plant competition.
Jallas, Eric, Sequeira, R.A., Thanisawanyangkura, Sornprach, Sinoquet, Hervé, Turner, Sammy, Crétenet, Michel   +5 more
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Interception of Light and Light Penetration in Plant Tissues

1996
There are three potential fates for a photon arriving at a tissue: it can be reflected, absorbed, or transmitted. All three factors are inter-related. The probability of one of these fates depends on the wavelength and the angle of incidence of the radiation, and on several characteristics of the tissue.
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Light regimes in Populus plantations using Voxel-based Light Interception

International Journal of Remote Sensing, 2011
Three-dimensional light interception by three uniform Populus canopies was studied using the Voxel-based Light Interception Model (VLIM) in combination with ground-based Light Detection and Ranging (LiDAR) measurements. As the VLIM was developed and validated in a virtual environment to ensure reference data availability, the objective was to test the ...
D. Van Der Zande, K. Dieussaert, J. Stuckens, W. Verstraeten, P. Coppin   +4 more
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Canopy Architecture Affects Light Interception in Sweet Cherry Your

2012 Dallas, Texas, July 29 - August 1, 2012, 2012
Canopy light interception is fundamental factor contributing to horticultural crop performance and quality. No studies have evaluated light interception of modern fruit tree architectures such as compact fruiting walls. Herein we report on daily trends in Photosynthetically active radiation (PAR) interception in sweet cherry trees trained to vertical ...
null Jingjin Zhang, null Ruilong Luo, null Patrick Scharf, null Matthew Whiting, null Qin Zhang   +4 more
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