Nitrogen Use Efficiency, Nitrogen Fertilizers,nitrogen algorithms, NUE, Nitrogen and the Environment

Department of Plant and Soil Sciences
Oklahoma State University
Driving Directions to OSU

OSU Hand Planter

Nitrogen use efficiency, nitrogen algorithms,improved methods of N fertilization for corn and wheat
World Nitrogen Use Efficiency for Cereal Production is 33%,
Agronomy Journal 91:357

Nitrogen Use Efficiency, Nitrogen Fertilizer, Nitrogen ManagementTrimble Pocket Sensor, Greenseeker, NDVI, nitrogen                    

Last update: October 12, 2015                                                          I-Phone APP for NDVI Sensor N Rates

Growing Degree Day Calculator
Nitrogen Facts
Nitrogen Use Efficiency
Nitrogen Cycle
Nitrogen Fertilizers
Ammonia losses from Urea +NH3 Loss Calculator
Nitrogen Fertilization Methods
Nitrogen Deficiencies
Nitrogen Uptake in Corn and Wheat
Can grain protein be predicted ?
Nitrogen and Weather
NUE Science Network
NUE in Corn, Wheat, and Rice
World Wheat, Corn, and Rice
Nitrate Critical Levels
Alternative Product Evaluation
Hand Held Sensor History
Dr. Norman Borlaug
The Green Revolution
Experiment Stations, Plot Research

>50% NUE?
Our Approach

1. Resolution for Precision Agriculture
2. In Season Prediction, Wheat Yield
3. In-Season Prediction, Corn Yield
4. Response Index
5. Independence of Yield Potential and N Response
6. Nitrogen Fertilization Algorithm
7.  Benefits of Using this Technology
8.  Sensors Developed by OSU
9. Cotton Research
10. N Fertilization Approaches
11. Farmer Experiences and
Case Studies


Journal Publications
VRT Application Equipment
Conferences and Workshops
Society and Meeting Presentations
Extension of the Concept
Library of Yield Prediction Equations
Undergraduate and Graduate Classes
OSU MS and Ph.D. Graduate Students, 1991-present

Nitrogen Rich Strips for Improved Nitrogen Fertilizer Management

14 th annual NUE Conference
Univ. Idaho

NUE Conferences 2003-2015

FACT: 20% increase in NUE for the world is worth 

105,890,000 Mg of N fertilizer consumed each year in the world; 60% for cereal production

GreenSeeker Field Results

Do Optimum N Rates Change Each Year?

NUE Tools
Sensor Based Nitrogen Rate Calculator, Topdress and Sidedress N rates for Corn and Wheat, Nitrogen management
Sensor Based Nitrogen Rate Calculator, on-line since 2002

How can the SBNRC Help You?

Corn Producers, Why do you apply more N than Needed?

Wheat Grain Protein Optimizer (option 30)
How do I get started using the GreenSeeker Technology
I'm interested in improving how I use N fertilizer, what can I do?

Trimble GreenSeeker handheld sensor
Additional Site
Pocket Sensor
Nitrogen Rich Strips
Don't apply more N than you need (pictures)

Current Algorithms Used

Wheat N Rich Strips for Corn
Apply for Graduate School at Oklahoma State University in Precision Agriculture
Advanced Training in Applied Precision Agriculture
Collaborative Research with USDA-ARS
Mesonet Files
Iowa State University, NSTL
University of Nebraska, USDA-ARS

Collaborative Projects

Sub Saharan Africa
Phosphorus Use Efficiency
Phosphorus Indicator Plants
Kansas State University
INTA Argentina
CIMMYT/Mexico, Guatemala
Virginia Tech
North Dakota State University
Chinese National Academy of Sciences
Saskatchewan, Canada
Now over 100+ OSU Graduate Students Have Now Worked with CIMMYT in Mexico, Turkey, China, Argentina, India, Russia, and Uzbekistan
  Causes of Plant to Plant Variability in Yield within Corn Production Systems By plant corn nitrogen management for improved nitrogen use efficiency International Programs in Sensor Based Nitrogen Management
GreenSeeker Sensor activities around the world
Use of sensor CV's for improving mid-season Nitrogen Rate Recommendations
Can sensor CV's assist in refining fertilizer N?

Precision Sensing Equipment Developed at Oklahoma State University
Precision Ag Equipment

 Web Sites Developed in addition to NUE
By-Plant Yield Prediction in Corn Production Systems
Predicting By-Plant Corn Yields
Hand Held GreenSeeker Sensors
Hand-Held GreenSeeker Sensors
Nitrogen Use Efficiency, Facts and Figures
NUE Facts and Figures

International Maize and Wheat Improvement Center (CIMMYT) in Mexico City

GreenSeeker Sensors

Oklahoma State University
Oklahoma State University

The Hunger Site

If these were our children, wouldn't we be doing more?


Dr. Norman Borlaug endores the GreenSeeker N Management Approach for wheat and corn production

P Solubility


  Oklahoma Soil Fertility Handbook, 2006
OSU Soil Fertility Handbook
Long Term Soil Science Fertilizer Experiments
OSU Long-Term Experiments
Bed Planting Production Systems for Spring Wheat and Winter Wheat
Bed Planting Wheat
How to increase nitrogen use efficiency in corn and wheat production systems, N use efficiency
How to increase nitrogen use efficiency in cereals
Web Sites Developed in addition to NUE

Regional Precision Agriculture Trial for 2005
Collaborative Research Program for Corn Production

VRT Trials, 2002-2005 and RESOLUTION 2004

Field Scale VRT Trials 2003

OFIT Trials

MEXICO 2002 Results

General NFOA Presentation

Corn Research


Research Highlights


Soil Fertility Research and Education Advisory Board, Checkoff Presentations

OSU 2009 Research Program



Feeding Our World




Progress 1989-2011


New N Management

Discovery Channel Producer Jenn Sunnerton Visits OSU and the Precision Ag Team

There is no man so good that if he placed all his actions and thought under the scrutiny of the laws, he would not deserve hanging ten times in his life.  "Michel de Montaigne, Essays, 1595,
What do I know?, Que sais-je?  Que se yo?