Weekly Crop Water Demand Report for Farmers

By Scout Nelson

Growers across the Nebraska Panhandle and northeast Colorado rely on clear, timely information to make every inch of water count. This weekly update provides estimated crop water use drawn from local weather data and crop growth conditions. The estimates are based on evapotranspiration (ET), which reflects how much water crops lose through evaporation from soil and transpiration from leaves. Using ET helps farmers decide when to irrigate and how much water to apply.

Water use is never the same in every field. It changes with crop stage, temperature, wind, humidity, soil type, and recent rainfall. A young field needs less water than a flowering field. Sandy soils usually need more frequent irrigation than heavier soils. Windy, hot days increase ET, while cool, cloudy weather lowers it. Because of these differences, the numbers in the weekly tables should be used as guidance, then adjusted for local conditions.

These estimates support efficient irrigation scheduling. Growers can compare weekly crop water use with rainfall and available soil moisture to decide if irrigation is needed. Applying water at the right time prevents crop stress, protects yield, and saves energy. Avoiding over-irrigation also reduces runoff and nutrient loss, helping protect local waterways.

The tables summarize typical crops in the region and are updated each week during the growing season. They reflect conditions measured in the Panhandle and adapted for northeast Colorado, so they are practical for farms on both sides of the state line. The goal is simple: use data to improve decisions.

For best results, pair the tables with on-farm tools such as soil moisture probes, flow meters, and careful scouting. Check pivots and laterals for leaks, verify nozzle packages, and match set times to the recommended water needs. Keep notes on field growth stage so your irrigation plan stays aligned with the crop.

Producers can sign up to receive the weekly table by text message, making it easier to stay current through the season. Using these estimates consistently will help stretch limited water supplies, keep crops healthy, and support long-term water stewardship across the region. Accurate records also improve next year’s planning significantly.

Photo Credit: university-of-nebraska