University of Nebraska—Lincoln Extension GWC9 Biology and Management of Horseweed

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Slide Rule for Calculating Recommended Nitrogen Rates for Corn

EC168

Corn farmers looking for a quick and easy way to calculate their nitrogen rate or consider adjustments based on nitrogen and corn costs will appreciate a new slide rule from UNL Extension. The Corn Nitrogen Rate Slide Rule (EC168) is free and was produced with financial support from the Nebraska Corn Board.

“The slide rule will help farmers know how much nitrogen is needed for corn and adjust for economic conditions,” said Charles Shapiro, a UNL extension soils specialist. “It’s important to apply nitrogen properly — the cost of under applying is always a lot higher than over applying.” Designed to fit in a glove box or pocket, the slide rule can be used in the field to calculate nitrogen fertilizer needs in six easy steps. To use it, farmers will need to know the amount of soil organic matter in their fields based on soil tests. (See Instructions for Using the Nitrogen Rate for Corn Slide Chart, EC 168 .)

Complete UNL nitrogen recommendations and further information are available in Extension Circular 117, Fertilizer Suggestions for Corn.

To Order
Slide rules can be ordered from local Extension offices or by sending a No. 10, self-addressed envelope with $0.79 postage to Charles Shapiro, 57905 866 Rd, UNL Haskell Agricultural Laboratory, Concord, NE 68728-2828.

Resources

For additional information on soil nutrient information available from UNL Extension, check the CropWatch Web site for the specific crop of interest and then look under the Soil Management category in the left navigation bar.

Extension is a Division of the Institute of Agriculture and Natural Resources at the University of Nebraska–Lincoln cooperating with the Counties and the United States Department of Agriculture.

University of Nebraska–Lincoln Extension educational programs abide with the nondiscrimination policies of the University of Nebraska–Lincoln and the United States Department of Agriculture.