Lawn Conditions

Measured and recorded by the Davis Wireless Leaf & Soil Moisture/Temperature Station.

It accurately measures soil temperature and moisture to inform us when the grass requires watering in the summer heat.

Lawn Soil Temperature	Lawn Soil Moisture	Solar Radiation Level
Monthly Evapotranspiration	Yearly Evapotranspiration	Daily Rain

Soil Misture Reading

• 0-10 Saturated Soil. Occurs for a day or 2 after irrigation

• 10-20 Soil is adequately wet

• 30-60 Usual range to irrigate regular soils

• 60-100 Usual range to irrigate heavy clay soils

• 100-200 Soil is becoming dangerously dry for maximum production. Proceed with caution.

Evapotranspriation (ET)

• Is a measurement of the amount of water vapor returned to the air in a given area.

• It combines the amount of water vapor returned through evaporation (from wet vegetation surfaces and the stoma of leaves) with the amount of water vapor returned through transpiration
  (exhaling of moisture through plant skin) to arrive at a total.

• Effectively, ET is the opposite of rainfall, and it is expressed in the same units of measure (inches, millimeters).

• The Vantage Pro uses air temperature, relative humidity, average wind speed, and solar radiation data to estimate ET, which is calculated once an hour on the hour.

• ET requires the optional solar radiation sensor.

Solar Radiation (W/m2)

• Measurement of solar power and is defined as the rate at which solar energy falls onto a surface

• The unit of power is the Watt (abbreviated W). In the case of solar irradiance, we usually measure the power per unit area, so irradiance is typically quoted as W/m², that is, Watts per square meter

6 Week National US Drought Montior

12 Week National US Drought Montior