The goal of the study was to compare how efficiently crops in Serbia use water when they are irrigated versus when they rely on rainfall. The researchers looked at data from different sources to analyze how much water different crops need and how much they produce. They found that some crops like alfalfa, sorghum, maize, and soybean benefit from irrigation, while others don't show a clear relationship between water use and yield. Factors like extreme temperatures, frost, hail, nutrients, and plant health also play a role in how efficiently crops use water.