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Modelling and measurement of radiation interception by olive canopies
Agricultural and Forest Meteorology, 2000We present the formulation, calibration and validation of a model to estimate photosynthetically active radiation (PAR) intercepted by olive (Olea europaeaL.) canopies. The model calculates the PAR transmittance at any point located within the four central trees of the orchard.
M.J. Mariscal, F. Orgaz, F.J. Villalobos
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Interception of photosynthetically active radiation by cacti of different morphology
Oecologia, 1980Ribbing, orientation of cladodes, and variations in stem height were examined theoretically and in the field to see whether the morphology of various cacti could be interpreted as adaptations for intercepting photosynthetically active radiation (PAR). The total daytime PAR incident on different parts of the stem was related to the nocturnal increase in
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The effect of leaf-lobing on the interception of direct solar radiation
Oecologia, 1989The extent to which leaf-lobing influences the interception of direct solar radiation by individual plants was studied by means of computer simulations. The morphology, size and orientation ofAmbrosia artemisiifolia L. leaves were measured and used to construct a prototypeAmbrosia plant upon which a computer simulation was based. The leaf geometries of
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Associations between yield, intercepted radiation and radiation-use efficiency in chickpea
Crop & Pasture Science, 2017Relationships between yield, biomass, radiation interception (PARint) and radiation-use efficiency (RUE) have been studied in many crops for use in growth analysis and modelling. Research in chickpea (Cicer arietinum L.) is limited, with variation caused by environment and phenological stage not adequately described. This study aims to characterise the
Lachlan Lake, Victor Sadras
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Consequences of breeding on biomass, radiation interception and radiation-use efficiency in wheat
Field Crops Research, 1997Abstract Field experiments were conducted during 1991 and 1992 to identify the effect of wheat breeding on crop biomass production and its physiological determinants, i.e. radiation interception and radiation-use efficiency. To address this objective, biomass accumulation and its physiological attributes of seven cultivars (including a commercial ...
Daniel F. Calderini +2 more
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Intercepted flux and the horizontal component of solar radiation
Theoretical and Applied Climatology, 1995For the first time a method is presented to actually measure the radiative flux intercepted by cylindrical and conical objects in radiation fields of any unknown angular distribution.
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A theoretical analysis of radiation interception in a two-species plant canopy
Mathematical Biosciences, 1991Classical radiation interception laws for monospecific canopies cannot be used directly for bispecific canopies. They are always based on the gap frequency concept (i.e., the probability of no interception), which does not provide any information about the sharing of intercepted radiation between species. A theoretical analysis is reported that relates
Sinoquet, Herve, Bonhomme, Raymond
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Mapping interception of photosynthetically active radiation in sweet cherry orchards
Computers and Electronics in Agriculture, 2015Canopy mapping on fractional photosynthetically active radiation (PAR) interception.Canopy projection distortion correction due to sun zenith and azimuth angle changes.Mobile PAR measurement system with a constant spatial resolution of 0.01msample-1.Canopy mapping and correction methods evaluation at dormant and full canopy stages.
Jingjin Zhang +2 more
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Relation of shape of canopy to interception of radiation and yield of wheat
The Journal of Agricultural Science, 1981SUMMARYField experiments were made at the Punjab Agricultural University, Ludhiana, during 1974–5 to 1978–9 to study the possibility of improving wheat yield by more efficient use of radiant energy through modification of the shape of the canopy under varying levels of fertilizers, irrigation and seed rates.
G. S. Dhillon, D. S. Kler
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Plasma Tubes Intercept Micorwave Radiation Independent of Polarization
2007 IEEE 34th International Conference on Plasma Science (ICOPS), 2007Summary form only given. We have been designing a plasma shield intended to protect sensitive microwave equipment from intense electronic warfare signals. A layer of plasma tubes is used as a microwave reflector. The plasma tubes work extremely well in intercepting microwave radiation when the incident wave electric field is parallel to the tubes ...
Igor Alexeff +5 more
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