RJ

McGrath
Newton, MA Since 1957 617-332-3339

There are week long seminars, even longer actually, devoted to irrigation scheduling. I will try to put it in easy to understand generalized terms for you.

In the northeast we use about 1” – 1¼”of water per week with loamy soil. The water used in two ways.

Plant Use

Evaporation

• Therefore we need to replace about 1” – 1¼” of water per week.

• Rotary sprinklers apply about .25” (that’s point two five) of water in 1 hour. To achieve 1¼” of water they would need to run 5 hours per week. Divided by 7 days a week. Equals about 42.85 minutes per day. Call it 40 miuntes

• Spray type sprinklers apply about 1.5” of water in 1 hour. To achieve 1” of water spray heads don’t even need to run for a full hour per week. 60 minutes divided by 1.5” equals 40 total minutes divided by 7 days equals 6 minuts (rounded)