Moat is a traditional method of irrigation. Moat or pully system is a very old system of irrigation. In India it is popularly known as ‘Ghiri’.In this system, a pully or ghiri is placed on the well with a rope. The one end of this rope is keep free to pull water from the well. A bucket is tied on the other end of the rope to pull water. When we lose the rope, bucket moves into the well. When we pull rope towards us, bucket came out from well with water in the bucket. It is easy to pull bucket through pully because it changes direction of force or load.