Why doesn’t SWAN schedule from actual soil moisture probes?

Why doesn’t SWAN schedule from actual soil moisture probes?

Soil moisture probes (SMP) are valuable tools to monitor your soil moisture status, however their accuracy can vary and is dependent on many factors. Because of this SWAN does not include SMP data to generate an irrigation schedule.

The factors that may affect the accuracy of your SMP data include:

  • Location of the SMP in the field. SMPs provide information about one single point in your farm, which means conditions such as soil type variations, air pockets around the probe, soil impermeable layers or simply SMPs installed far from the root zone, could supply misleading information about the actual soil moisture status.
  • Unlike SMP data, SWAN’s model considers how your crop water use is affected when your crop is subjected to stress factors. It then uses this information to generate an accurate irrigation schedule.
  • Some probes may not be calibrated to be used in a specific soil type, which could lead to inaccurate soil moisture readings.

Other factors to consider are:

  1. Not everyone has SMPs in every field.
  2. Probes cannot give information on future soil moisture status.
  3. Probes can stop working.

    • Related Articles

    • How do you know that the SWAN estimate of soil moisture is accurate?

      The algorithms used to calculate soil moisture balance have been tested in the field, and refined over many years of use in a variety of situations. As long as the parameters that are fed into the model have been set up appropriately, the estimations ...
    • When does the data get into SWAN?

      Data is collected from a range of sources and uploaded into SWAN on a regular basis. The frequency depends on the type of data, and how often SWAN has been asked to collect the data. Forecast weather data is collected twice a day, once early in the ...
    • Description of Health Indexes available via SWAN Systems

      Turf - NDVI With the March 2021 release of SWAN Systems came a whole new suite of health indexes to assist you in monitoring the health of your plants. To find out which one is best suited to your needs, please refer to the list below. NDVI – ...
    • What if the forecast rain doesn’t eventuate?

      The SWAN Systems model of your fields will be updated every time new information is received, this includes weather forecasts and observed rainfall at nearby weather stations. As the model steps through the days, forecasted rainfall amounts will be ...
    • Why should I believe what SWAN recommends?

      SWAN Systems operates utilising scientifically proven algorithms backed up by many years farming and consulting to irrigation industries such as horticulture.  Now that it is available as a SaaS solution, anyone with a subscription can get the ...