FIELD CALIBRATION OF THE THETA PROBE FOR DES MOINES LOBE SOILS

@article{Kaleita2005FIELDCO,
  title={FIELD CALIBRATION OF THE THETA PROBE FOR DES MOINES LOBE SOILS},
  author={Amy L. Kaleita and Joshua L. Heitman and Sally D. Logsdon},
  journal={Applied Engineering in Agriculture},
  year={2005},
  volume={21},
  pages={865-870}
}
Knowledge of soil moisture is needed to understand crop water use, hydrology, and microclimate. A reliable, rapid technique is needed, and recently an impedance soil moisture probe (Theta Probe) has been accepted by the scientific community. The purposes of this study were to calibrate the probe for soils of Central Iowa through field sampling, to determine the number of samples needed for calibration, and to determine the effect of temperature on calibration. Laboratory calibration was… 

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References

SHOWING 1-10 OF 24 REFERENCES
Field calibration of a capacitance soil water probe in heterogeneous fields
Soil water research requires methods to perform accurate measurements. A capacitance probe gauge has characteristics that seem to make it an attractive replacement for neutron scatter gauges to
Real-time soil water dynamics using multisensor capacitance probes : Laboratory calibration
There is a continued need for better methods to perform accurate, real-time, nearly continuous soil water measurements at specific depth intervals, with minimal soil disturbance, and covering
Calibration and modification of impedance probe for near surface soil moisture measurements
A reliable and low cost sensor that can measure soil moisture at or near the soil surface is currently not available. The objectives of this study were: (i) to evaluate the possibility of modifying
Calibration of a Frequency Domain Reflectometry Sensor for Humid Tropical Soils of Volcanic Origin
Recently, a frequency domain reflectometry (FDR) was developed for measuring soil water content. It has a multivibrator that sends electromagnetic waves along its probes, and it measures the
PRECISION OF NEUTRON SCATTERING AND CAPACITANCE TYPE SOIL WATER CONTENT GAUGES FROM FIELD CALIBRATION
Soil water content gauges based on neutron scattering (NS) have been a valuable tool for soil water investigations for some 40 yr. However, licensing, training, and safet y regulations pertaining to
Calibration of Capacitance Probe Sensors in a Saline Silty Clay Soil
Capacitance probe sensors are a popular electromagnetic method of measuring soil water content. However, there is concern about the influence of soil salinity on the sensor readings. In this study
Field Evaluation of the Dual‐Probe Heat‐Pulse Method for Measuring Soil Water Content
The dual‐probe heat‐pulse (DPHP) method is useful for measuring water content (θ) and change in water content (Δθ) near the soil surface. The method has been evaluated in laboratory and greenhouse
Measurement of soil water content with a 50-MHz soil dielectric sensor
The Hydra Probe 1 is a relatively inexpensive and widely used soil water content (0, m 3 m -3 ) sensor. It measures both the real (e r ) and imaginary (e i ) components of the complex soil dielectric
...
...