By selecting a plant type, you select values for both.
The crop coefficient adjusts the gathered ET to the ET amount
required by the specific plant material.
Some plants may need much less water than the relative daily ET
to thrive, e.g., native plants, while other plants may require
more. The crop coefficient allows WeatherTRAK ET plus to
customize each station to a particular type or group of plants to
give you efficient water usage.
The root depth is necessary for proper irrigation because
different watering patterns can affect how deep the applied
water infiltrates the soil. Deep-rooted plants require a different
irrigation pattern than shallow-rooted plants to supply water
deeper into the soil.
WeatherTRAK ET plus adjusts the watering pattern to account for
the plant type selected.
10. Set Root Depth
You set the depth of your plant’s roots. The default values are
based on standard values for selected plant and soil types which
you can adjust as required.
• Larger root depths allow for longer intervals (days) between
watering.
• Smaller root depths create shorter intervals between
watering.
11. Set Microclimate
You enter the amount of direct sunlight your plants receive each
day.
If the area is:
• Sunny all day, this will water exactly to ET.
• Sunny most of day, this will decrease watering by 10% of ET.
• Shady most of the day, this will decrease watering by 20%
of ET.
• Shady all of the day, this will decrease watering by 30%
of ET.
Programming Your WeatherTRAK ET plus 33
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