Growing Degree Days & Evapotranspiration Data

rainstorm over farm

ET/GDD Tool

soil temperature map of Nebraska

Additional ET Resources

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NERain Reports

The Nebraska Rainfall Assessment and Information Network (NeRAIN) is a citizen weather-monitoring program operated by the Nebraska Department of Natural Resources (NeDNR). The network consists of several hundred volunteers that record precipitation measurements and outstanding weather events for the NeRAIN website. NeRAIN information is updated daily, available to view on an interactive map as well as in several reports, or downloaded in table format.

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Crop Water Use by Plant Growth Stage

These charts can be used with readings from an ETgage® or other ET reference. To use the chart, first identify the change in the ET rate across the horizontal row and then identify the current growth stage in the left column. Follow the two columns to the point where they intersect to identify the ET rate to use in your irrigation scheduling. When planning irrigation, account for soil moisture, precipitation, weather conditions, and the ET rate for growth stage of your crop.


 

Estimating Growth Stage

Each of the Crop Growth Stage Charts listed above also includes illustrations of the growth stages. For more detailed information, see these resources:

Nebraska map of average ET for previous week

Map of Nebraska ET for previous day

Check the High Plains Regional Climate Center's website for local, regional, and national climate data resources you can use when planning for your agricultural operation.

gdd chart

Additional GDD Resources