Five different types of microsprinklers were selected for identification as M-1, M-11, M-111, M-IV and M-V) for studying the Merrium and Keller Distribution Uniformity (DU) and Christiansen’s Uniformity Coefficient (UCC). The DU and UCC were studied at different spacing of microsprinkles and different pressures. The pressures were in the range of 1.0 to 2.0 kg/cm2 with and increment of 0.5 kg/cm2 and the spacings between microspinklers were 3 x 3 m to 10 x 10 m with an increment of 1.0 m (i.e. 3 x 3 m, 4 x 4 m ….., 10 x 10.0 m). The M-V has shown maximum UCC, 94.74 percent at 2 kg/cm2 pressure at the psacing of 3 x 3 m., and the lowest by M-IV i.e. 87.52 percent. More than desired value (70%) of UCC was reported only for MS-I for all pressures under consideration and for spacings 3 m x 3 m to 7 m x 7 m which indicates its superiority over other types of microsprinklers. The highest value of DU, 96.90 percent was recorded for M-II at 2.0 kg/cm2.

Keywords: Distribution uniformity; Microsprinkler spacings; Uniformity coeffieicnet.