Nitrogen Use Efficiency, Nitrogen Fertilizers, NUE, Nitrogen and the Environment Response Index (N Rich Strips)  that used to be called 2X Strips

N Rich strips (running left and right) near Esperance, Australia (courtesy of David Cox)

Loy Marshall, N Rich STrip on Left (RI = 1.38 at this site).  Jason Lawles on right
Tom Cannon (Darin Drury) Ponca City, OK, RESPONSE INDEX = 1.33
Farmer Cooperator, Tom Cannon & Darin Drury (picture taken April 11, 2002)
Left of flag, 40 lb N as UAN applied in December + 60 lb N/ac as UAN applied May 20, 2002
Right of flag, 40 lb N as UAN applied in December
Reverse of top image
Steve Clark, RESPONSE INDEX = 1.46

Farmer Check (Steve Clark, Amorita, OK), taken March 20, 2002
45 lb N applied preplant as urea

Non-N limiting Strip (Steve Clark, Amorita, OK) taken March 20, 2002
92 lb N applied preplant
Matt Steinert-Beopple (Covington, OK), RESPONSE INDEX = 1.43
1X Strip (Matt Steinert (Beopple Farm), Covington,OK), taken March 28, 2002
10 preplant (as 18-46-0), 30 topdress as UAN, January 12, 2002
Non-N limiting Strip (Matt Steinert (Beopple Farm), Covington,OK), taken March 28, 2002
10 preplant (as 18-46-0), 60 topdress as UAN, January 12, 2002
Kenneth Failes, Cherokee, OK, RESPONSE INDEX = 1.1
Check: 30 lb N preplant as blend (46-0-0, 18-46-0, 35-17-0)
2X Strip: 60 lb N preplant (same blend) 2XStrip to the left of Kenneth Failes and Kyle Freeman
Picture taken March 20, 2002

Loy Marshall, Hennessey, OK, RESPONSE INDEX = 1.1
Check: xx lb N preplant
Non N Limiting Strip: xx lb N preplant
Picture taken March 28, 2002
Lahoma, OK, OFIT Trial, taken March 22, 2002, RESPONSE INDEX = 1.28

 
Measuring the Response Index