Case Study – Citrus


  • Hornet: 80cm probe
  • Soil Type: Loam
  • Crop: Oranges
  • Location: Waikerie, South Australia
  • Irrigation type: Drip irrigation

This is an 80cm probe in a 5 year old citrus tree crop on drip irrigation. The soil is a loamy clay. The graph shows 10, 30, 50 and 70cm moisture levels. Notice that the trees went into stress between 3rd and 6th march before the irrigation was ramped up when 4mm was applied every day until the hot period started to subside (see soil temperature, 2nd graph below).

citrus case study graph soil moisture (2)

Notice that over this period it even started to dry out at deeper levels (30 to 70cm). It took 3-4 days of rewetting for moisture levels to lift again at 50cm. To avoid this situation, it is best to keep an eye on the graphs daily so that you keep moisture levels at their optimum.

Citrus crop benefit from the Hornet – optimum production without over or under watering.

Citrus case study graph Temp