Thermal Infrared Emissivity Dependence on Soil Moisture in Field Conditions

2011 ◽  
Vol 49 (11) ◽  
pp. 4652-4659 ◽  
Author(s):  
Juan M. Sanchez ◽  
Andrew N. French ◽  
Maria Mira ◽  
Douglas J. Hunsaker ◽  
Kelly R. Thorp ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Thermal Infrared ◽  
Field Conditions ◽  
Infrared Emissivity

Investigating the Impact of Soil Moisture on Thermal Infrared Emissivity Using ASTER Data

2015 ◽  
Vol 12 (2) ◽  
pp. 294-298 ◽  
Author(s):  
Heshun Wang ◽  
Qing Xiao ◽  
Hua Li ◽  
Yongming Du ◽  
Qinhuo Liu
Keyword(s):  
Soil Moisture ◽  
Thermal Infrared ◽  
Infrared Emissivity ◽  
Aster Data ◽  
The Impact

scholarly journals Effect of Soil Moisture on the Angular Variation of Thermal Infrared Emissivity of Inorganic Soils

2014 ◽  
Vol 11 (6) ◽  
pp. 1091-1095 ◽  
Author(s):  
Vicente Garcia-Santos ◽  
Enric Valor ◽  
Vicente Caselles ◽  
Cesar Coll ◽  
Ma. Angeles Burgos
Keyword(s):  
Soil Moisture ◽  
Thermal Infrared ◽  
Infrared Emissivity ◽  
Angular Variation

scholarly journals Thermal infrared emissivity measurements under a simulated lunar environment: Application to the Diviner Lunar Radiometer Experiment

2012 ◽  
Vol 117 (E12) ◽  
pp. n/a-n/a ◽  
Author(s):  
Kerri L. Donaldson Hanna ◽  
Michael B. Wyatt ◽  
Ian R. Thomas ◽  
Neil E. Bowles ◽  
Benjamin T. Greenhagen ◽  
...  
Keyword(s):  
Thermal Infrared ◽  
Infrared Emissivity ◽  
Lunar Environment ◽  
Emissivity Measurements

EFFECTS OF SOIL MOISTURE TENSIONS ON GROWTH OF WHEAT

1962 ◽  
Vol 42 (1) ◽  
pp. 180-188 ◽  
Author(s):  
J. J. Lehane ◽  
W. J. Staple
Keyword(s):  
Soil Moisture ◽  
Early Stage ◽  
Moisture Stress ◽  
Field Conditions ◽  
Grain Production ◽  
Optimum Conditions ◽  
High Soil Moisture ◽  
Early Stress ◽  
Moisture Supply ◽  
Favorable Conditions

Greenhouse experiments in which wheat was grown on a limited amount of soil moisture showed that crops subjected to moisture stress at an early stage of growth yielded well on all soils tested, but that crops with moisture stress late in the season yielded poorly on loam soils. Late stress was less damaging on clay because high soil moisture tension in this soil resulted in better distribution of moisture use during the critical period.Crops grown under early stress used less moisture, but were equally as efficient in grain production as those grown under optimum conditions. Crops with moisture shortage during heading and filling were inefficient in moisture use.Similar variations in moisture efficiency caused by seasonal trends in available moisture supply have been observed under field conditions. For example, good yields of wheat were produced with a minimum of rainfall in Saskatchewan in 1958 when a shortage of moisture in May and June was followed by more favorable conditions in July.

scholarly journals Application of a Monopole Antenna Probe with an Optimized Flange Diameter for TDR Soil Moisture Measurement

Sensors ◽  
2020 ◽  
Vol 20 (8) ◽  
pp. 2374
Author(s):  
Jacek Majcher ◽  
Marcin Kafarski ◽  
Andrzej Wilczek ◽  
Aleksandra Woszczyk ◽  
Agnieszka Szypłowska ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Root System ◽  
Plant Root ◽  
Time Domain Reflectometry ◽  
Monopole Antenna ◽  
Field Conditions ◽  
Growth Monitoring ◽  
Electromagnetic Simulations ◽  
The Time Domain ◽  
Plant Root System

Soil volumetric water content (θ) is a parameter describing one of the most important factors conditioning proper plant growth. Monitoring soil moisture is of particular importance in the rational use of water resources for irrigation, especially during periods of water scarcity. This paper presents a method of measuring soil moisture in the vicinity of the plant root system by means of a probe designed to be mounted on a mobile device used for precise plant irrigation. Due to the specific field conditions of the measurement, the design of the probe was proposed as a monopole antenna. Electromagnetic simulations of the probe were carried out with Ansys HFSS software to optimise its dimensions. Then a prototype of the probe was manufactured to conduct laboratory measurements with the use of a vector network analyser (VNA) working in the 20 kHz to 8 GHz frequency range. The VNA analyser was configured to work in the time-domain reflectometry (TDR) mode. From measurements of the time distance between reflections from the probe’s elements it is possible to calculate the bulk dielectric permittivity of the soil surrounding the probe. Next, based on commonly used soil moisture dielectric calibrations one can determine θ of the soil sample. The paper presents simulation results and laboratory tests of an antenna probe. Due to its tough and durable design, this type of probe gives the possibility of easy application in field conditions, which makes it especially suitable for mechanically demanding measurement systems. As the sensitivity zone is comparatively large, this probe is well-suited to measuring soil moisture in the vicinity of the plant root system.

Sign in / Sign up

Export Citation Format

Share Document