Results 271 to 280 of about 3,913,387 (306)

Canopy temperature and growth of differentially irrigated alfalfa

Agricultural Meteorology, 1983
Abstract Plant temperature of alfalfa (Medicago sativa L.) grown with different amounts of irrigation water has not been reported. The objective of this experiment was to determine if progressive differences in canopy temperature existed among plots of alfalfa (ev. Cody) subjected to 7 graded watering treatments.
M.B Kirkham, D.E Johnson, E.T Kanemasu, L.R Stone   +3 more
openaire   +1 more source

Airborne Remote Sensing Used to Estimate Percent Canopy Cover and to Extract Canopy Temperature from Scene Temperature in Cotton

Transactions of the ASABE, 2007
The goal of this research was to separate the soil and plant temperatures and create an image map of plant water stress. Data from hyperspectral imagery (HSI) and thermal infrared (TIR) sensors were collected using an airborne platform over three seasons, involving three different varieties of Acala cotton, four different fields, and a total of ten ...
null W. R. DeTar, null J. V. Penner
openaire   +1 more source

Automated Irrigation Based on Threshold Canopy Temperature

Transactions of the ASAE, 1992
An automated drip irrigation system was controlled by continuously measuring cotton canopy temperature and computing 15-minute averages in a three-year field study between 1988-1990. Irrigation was applied only when average canopy temperature exceeded predetermined threshold values.
null D. F. Wanjura, null D. R. Upchurch, null J. R. Mahan   +2 more
openaire   +1 more source

Estimating evapotranspiration from midday canopy temperature

Irrigation Science, 1986
Measurements were made at New Delhi (India) on wheat (Triticum aestivum L.) and mungbean (Vigna radiata L.) crops growing during the winter and summer seasons respectively, to evaluate the use of the equation of Bartholic, Namken and Wiegand (1970) for estimating daytime evapotranspiration from a single measured canopy temperature.
P. L. Gupta, P. S. N. Sastry
openaire   +1 more source

Canopy temperature as a crop water stress indicator

Water Resources Research, 1981
Canopy temperatures, obtained by infrared thermometry, along with wet‐ and dry‐bulb air temperatures and an estimate of net radiation were used in equations derived from energy balance considerations to calculate a crop water stress index (CWSI). Theoretical limits were developed for the canopy air temperature difference as related to the air vapor ...
R. D. Jackson, S. B. Idso, R. J. Reginato, P. J. Pinter   +3 more
openaire   +1 more source

Investigation of crop canopy temperature in apple orchard

Physics and Chemistry of the Earth, Parts A/B/C, 2005
Abstract The paper shows a sophisticated case study for a possible determination of transpiration in apple orchard. The trial measurements were carried out in the Study Orchard of Horticultural and Food Industry University situated in Szigetcsep situated South of Budapest.
L. Tőkei, Z. Dunkel
openaire   +1 more source

Canopy temperature as a measure of salinity stress on sorghum

Irrigation Science, 1992
A complete understanding of plant response to combined water and salinity stress is desirable. Previous growth chamber and greenhouse experiments with sorghum and maize indicate that soil salinity, by negatively affecting growth processes, may reduce consumptive water use, thus prolonging the supply of available soil moisture.
GerardJ. Kluitenberg, JamesW. Biggar
openaire   +1 more source

Canopy temperature of sugarcane as influenced by irrigation regime

Agricultural and Forest Meteorology, 1986
Abstract A field study was conducted in the pre-monsoon dry and hot climatic environment of northern India, with differentially irrigated sugarcane to evaluate canopy temperature ( T c ) as an index of water stress. The stressed crop experienced low to moderately high water deficits.
openaire   +1 more source

Variation in Canopy Temperature, Air Temperature and Relative Humidity Within wheat and Mustard Canopies under Sole and Intercropped Situations

Journal of Experimental Agriculture International
A two year field experiment was conducted at the B.C.K.V., Mohanpur, West Bengal (Lat. 22˚58' N and long 88˚31' E) to study the diurnal variation of air temperature, canopy temperature and Relative humidity within crop canopy under wheat and mustard intercropping system.
Sarika Jena, Pintoo Bandopadhyay, Rajib Nath   +2 more
openaire   +1 more source

An alternative to define canopy surface temperature bounds

Agricultural Water Management, 2010
Abstract Canopy temperature, which may be estimated by infrared thermometry (IRT), can serve as an indicator of plant water status. Idso et al., 1981a , Idso et al., 1986 proposed the nowadays much used concept of the crop water stress index, which relates observed canopy surface temperature (Ts) to maxima and minima temperature bounds.
openaire   +1 more source