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Basic Comparison of Monitoring Equipment

System
Advantages
Disadvantages
Monitoring Soil Moisture Tension (kPa)
Tensiometers
  • Relatively cheap
  • Easy to install
  • Can be read by yourself
  • Allows continuous monitoring
  • Labour Intensive to collect and record data
  • Requires regular maintenance
  • Can be inaccurate in extremely wet or dry soil
Gypsum Blocks
  • Relatively cheap
  • Easy to install yourself
  • Can be read by yourself
  • Continuous monitoring possible
  • Labour intensive to collect and record data
  • Requires a digital meter to be brought to each sensor site to take the readings
  • Can be inaccurate in extremely wet soil
Monitoring Total Soil Water Content
Neutron probe
  • Portable can be moved around sites
  • Very reliable and accurate
  • Not suitable for continuous monitoring
  • As the equipment is very expensive and contains radioactive material, it is generally used by consultants
  • Less accurate in the top 10 cm of soil
Capacitance Probes Eg. Enviroscan
  • Continuous monitoring
  • Accurate at all depths
  • Enable rapid reading and recording of results
  • Expensive
  • Need skill interpreting results

(Source: Guide to best practice water management - orchard crops.)



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