A study looked at how different irrigation methods and potassium fertilization affect water use in potato crops. They tested sprinkler and drip irrigation, varying the amount of water and potassium used. Results showed that the most water was used at the lowest irrigation level, with sprinkler irrigation using more water than drip irrigation. The crop's water needs varied at different growth stages, with the highest water productivity seen with high irrigation and potassium levels in the drip irrigation system.