Results 261 to 270 of about 899,925 (302)
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Errors in Measuring Absorbed Radiation and Computing Crop Radiation Use Efficiency
Agronomy Journal, 1993AbstractRadiation use efficiency (RUE) is often a crucial component of crop growth models that relate dry matter production to energy received by the crop. RUE is a ratio that has units g J−1, if defined as phytomass per unit of energy received, and units J J−1, if defined as the energy content of phytomass per unit of energy received.
Kevin P. Gallo +2 more
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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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Night Temperature Affects Radiation‐Use Efficiency in Peanut
Crop Science, 1992Three peanut (Arachis hypogaea L.) cultivars were grown under optimal field conditions in two environments in subtropical Australia contrasting primarily in night temperature. Mean minimum temperatures during the growing season were 16.7 °C (Kingaroy, cool) and 20.1 °C (Bundaberg, warm).
Bell, M. J. +2 more
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Estimating theoretical radiation‐use efficiency for kale crops
Grass and Forage Science, 2013AbstractEstablishing the radiation‐use efficiency (RUE) of forage brassica crops will aid our understanding of their photosynthetic performance. The concept of RUE has been developed for cereals and legumes, but there is limited information for forage brassica crops.
E. Chakwizira +3 more
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Effect of Maize Maturity on Radiation‐Use Efficiency
Agronomy Journal, 1991AbstractMaize (Zea mays L.) production has expanded into short‐season regions but it is not known whether the radiation‐use efficiency (RUE, g MJ−1)1 of new early hybrids differs from those grown in traditional maize‐growing regions. In this study, spectral reflectance measurements were used to derive estimates of photosynthetically active radiation ...
D. J. Major +2 more
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Increasing Radiation Efficiency Using Antenna Shape Optimization Approach
IEEE Antennas and Wireless Propagation Letters, 2018From the characteristic mode point of view of electrically small antennas, radiation efficiency normally decreases significantly if multiple modes are well excited. Among all these well-excited modes, the one with the lowest modal radiation efficiency determines how much actual radiation efficiency is guaranteed.
Ruiyang Li +3 more
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Use of tile overlays to reduce the radiation efficiency of radiating surfaces
The Journal of the Acoustical Society of America, 2002An intriguing possibility for reducing the radiation efficiency of a structure is to overlay its radiating surfaces with a contiguous set of low mass tiles. Experimental results show that significant reductions in sound power are possible depending on number of tiles, their geometry, attachment methods, mass, stiffness, and the amount of shear damping ...
Gary Koopmann +2 more
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Effect of Radiation Environment on Radiation Use Efficiency and Growth of Sunflower
Crop Science, 1997The level of incident radiation and the proportion of radiation that is diffuse affects radiation use efficiency (RUE) in crops. However, the degree of this effect, and its importance to growth and yield of sunflower (Helianthus annuus L.) have not been established. A field experiment was conducted to investigate the effects of radiation environment on
Bange, M.P. +2 more
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Efficient coherent radiation discrimination by using super-étalons
Optical Society of America Annual Meeting, 1990In many applications, the discrimination of coherent radiation against an incoherent background is required. Several approaches based on various forms of Fabry-Perot étalons have been investigated.1 Because of the intrinsic physical limitations of the étalons, the discrimination achievable with those devices is typically low.
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Characterizing ultrasonic transducers using radiation efficiency and reception noise figure
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 1998Transducer performance is considered separately for transmission and reception operations. The transmission operation is traditionally characterized by its traditional transfer function. Using a Thevenin source, the transfer function may be scaled to become the absolute radiation efficiency.
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