Archive of Sowacs discussion group for

MAY 1996
  • 36 (Soil Moisture, Crop Water Use: Can someone explain1. How do m agnets increase infiltration rates? 2. What is time domain reflectometry)
  • 35 (Re: Value of Different Systems - grower's experiences)
  • 34 (Value of Different Systems)
  • 33 (RE>soil moisture - positioning of sensors)
  • 32 (Discussion grp - Soil Water Content Sensors)
  • 31 (Insulation of TDR electrodes & installtn -Reply)
  • 30 (Re: Soil moisture variablity)
  • 29 (Re: Insulation of TDR electrodes & installtn)
  • 28 (Soil moisture variablity)
  • 27 (To TDR or not to TDR?)
  • 26 (iPoint data vs Continuous data)
  • 25 (Re: Sensor design economics--Your comments, please) nsulation of TDR electrodesw
  • 24 (Insulation of TDR electrodes)
  • 23 ( Re: MODELLING THE )Capacitance probe references
  • 22 (MODELLING THE SOIL WATER BALANCE UNDER RAINFED WHEAT )
  • 21 (Neutron probe access tubes (1.5" inner dia.))
  • 20 (Loggers with variable logging periods)
  • 19 (Measurement of water table depth using peizometers)
  • 18 (Measuring water potential by `AquaLab' -Reply)
  • 17 (PIZARRO HUMBERTO--TENSIOS TO MEASURE HYSTERSIS)
  • 16 (Measuring water potential by `AquaLab' -Reply)
  • 15 (Measuring water potential by `AquaLab')
  • 14 (tensiometers - hysteresis & range)
  • 13 (Insulation of TDR electrodes & installtn)
  • 12 (tensionics from Moutonnet Pierre)
  • 11 (Gravel bar water flow sensors?)
  • 10 (re TDR,Radar,shockwave Marty Grogan) **** Description of the basic concept behind TDR-based sensors.
  • 9 (re TDR,Radar,shockwave Martin Schmitz)
  • 8 (Water content vs suction/potentialRESENT Oops!)
  • 7 (Re: TDR vs Radar vs shockwave reflection?)
  • 6 (Watermark sensor comments)
  • 5 (TDR vs Radar vs shockwave reflection?)
  • 4 (Topps reference?)
  • 3 (psychrometry)
  • 2 (Soil Suction and Soil Water Content) **** Discussion on c alibration (in situ or not), whether we should be measuring soil water content or "suction", suce ss of thermal conductivity sensors
  • 1 (welcome to the automated list)
  • The second outgoing message outlines the principle of operation of TDR and FDR and the ir respective differences and problems (23 April 1996). As an example, the capacitance sensors used in the SENTEK EnviroSCAN is discussed. A lot of the discussion is ta ken directly from the TRICKLE-L archives.