DeLano, Daniel R., authorWilliams, Jeffery R., authorO'Brien, Daniel M., author2020-04-082020-04-081997-02-04https://hdl.handle.net/10217/203562Presented at the Central Plains irrigation short course and exposition on February 4, 1997 at the Colby Community Building in Colby, Kansas.An after-tax net present value(NPV) analysis of investing in three irrigation system modifications for the production of corn, grain sorghum, wheat, and alfalfa is conducted. Modifying a high pressure center pivot with low-drift nozzles and adding surge valves to a gated pipe system is economically feasible for each crop.born digitalCD-ROMsproceedings (reports)engCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.Text