Oklahoma State University

Reference Strips: Nitrogen Rich Strip

Reference Strips: N-Rich Strips

The N-Rich Strip is an area in the field that has received enough fertilizer N so that no matter what the environmental conditions may be, N will not be limiting during the growing season.  The rest of the field that receives the standard preplant rate is called the Farmers Practice.  The N-rich strip is used in conjunction with the GreenSeeker™ hand held sensor to determine mid-season N rates. Reference strips give you the capability of measuring crop’s N needs at topdress. The amount of N needed to reach maximum yields changes from one year to the next and having a reference strip in your field is an easy way to gauge the current demand.


The Whats and Hows of Video on Applying N-Rich Strips

Current Report CR:2277: Applying Nitrogen Rich Strips
Fact Sheet PSS-2258: The Evolution of Reference Strips in Oklahoma


The Whats and Hows of reading N-Rich Strips and using the Online Sensor Based Calc


N-Rich Strip Brochure

N-Rich Strip Brochure



Do you want to use the N-Rich strip Logo??
Download the Zipfile here. Download


Students sensing Reference Strips

NRich Strip Midseason and Harvest




 I also have sings to place in your fields if you like. Send me a note and I will get you some. 

Document Actions