On engines with belt-driven cooling fans, a fan clutch is often used to save energy and reduce noise. The fan clutch disengages slows or disengages the engine's cooling fan when extra cooling isn't needed. The fan pulls air through the radiator and air conditioning condenser when the vehicle isn't moving fast enough to provide adequate airflow for cooling.
St Augustine grass will go dormant when the soil temperatures fall below 55 degrees. If the soil remains warmer than 60 degrees all year, the grass will stay green. It will, however, slow in growth as the soil drops in temperature. Disadvantages of St Augustine grass. One of the disadvantages of St Augustine grass is its poor wear tolerance.
Crabgrass is a common problem in the typical lawn. Crabgrass is an annual grass that germinates once soil temperature reaches 55 to 60 degrees Fahrenheit for seven to 10 consecutive days.It grows all summer and produces seed that will germinate the following season.rabgrass is a common problem in the typical lawn. Crabgrass is an annual grass that germinates once soil temperature reaches 55 to 60 degrees Fahrenheit for seven to 10 consecutive days.