UNL Extension Publications

*Note: Document is in PDF format. Download the free Acrobat Reader to read or print PDFs, which are 2-4 pages in length unless otherwise noted.

NAWMN Weekly Data Collection Form

Using Modified Atmometers (ETgage®) for Irrigation Management
Describes the atmometer (evapotranspiration gauge) and explains how it can be used for irrigation scheduling. Examples are provided to show how information collected with an atmometer can be used to estimate crop water use for corn and soybean.
PDF version* (975 KB)

Watermark Granular Matrix Sensor to Measure Soil Matric Potential for Irrigation Management* (530 KB; 8 pages)
Defines soil matric potential and describes principles and operational characteristics of one of the electrical resistance type soil moisture sensors for irrigation management. Examples show how soil matric potential can be used for irrigation management.

Extension Circular 765, Magnitude and Trends of Reference Evapotranspiration Rates in South Central Nebraska* (1,00KB; 6 pages)

Enabling Producers to Use Water and Energy Efficiently

Estimating Crop Evapotranspiration

ETgage® and Watermark Sensor Instructions Checklist*
Brief list of steps involved in using the ETgage atmometer.

Irrigation Trigger Levels: Soil types (chart)

Predicting the Last Irrigation of the Season
Presents criteria and rules of thumb for predicting the last irrigation for corn, grain sorghum, soybeans and dry beans.
PDF version* (664 KB)