Nitrogen Slide Rules Back in Stock
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 using the Corn Nitrogen Rate Slide Rule (EC168). This was produced with financial support from the Nebraska Corn Board and is back in stock and available free.
"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 online with photos or in a 1-page PDF without photos.)
Complete UNL nitrogen recommendations and further information are available in Extension Circular 117, Fertilizer Suggestions for Corn.
Slide rules can be ordered from local Extension offices or by sending a No. 10, self-addressed stamped envelope with enough postage for 2 oz to Charles Shapiro, 57905 866 Rd, UNL Haskell Agricultural Laboratory, Concord, NE 68728-2828.