Your existing system...

Is equipped with 23 degree impact sprinklers on top.
Has non-uniform water application.
Is equipped with reduced angle impact sprinklers.
Is equipped with low pressure sprinklers on top.
Is equipped with low pressure sprinklers on drops.
Has no end gun shut off.
Has had no uniformity check in the past five years.
Has had no uniformity, calibration or maintenance check in the past five years.
Has had no major maintenance check in the past five years.
Is missing or has faulty pressure gauges.
Is not being scheduled by measured weather, soil, or plant conditions.
Has runoff and ponding during irrigation.
Applies water to non-cropland or a non-target crop.

Source: Evans, R.O., K.A. Harrison, J.E. Hook, C.V. Privette, W.I. Segars, W.B. Smith, D.L. Thomas, and A.W. Tyson. 1998. Irrigation conservation practices appropriate for the Southeastern United States. D.L. Thomas (ed.) Geologic Survey Project Report No. 32. Georgia Geologic Survey, Georgia Department Of Natural Resources, Environmental Protection Division, Atlanta, GA 30334. 43p.