Nitrogen Use Efficiency, Nitrogen Fertilizers, Wheat Nitrogen Fertilization, Corn Nitrogen Fertilization

orcid.org/0000-0002-1206-1105

Department of Plant and Soil Sciences
Oklahoma State University

b.arnall@okstate.edu
steve.phillips10@okstate.edu

Greenseeder Hand Planter

World Nitrogen Use Efficiency for Cereal Production is 33%
Agronomy Journal, 91:357-363

World Phosphorus Use Efficiency for Cereal Production is 16%
Agronomy Journal 109:1-8

Grain Yield Level and Nitrogen Response are Independent (maize and wheat)
Journal of Precision Agriculture, 12:508

Improving Nitrogen Use Efficiency in Cereal Grain Production with Optical Sensing and Variable Rate Application. Agronomy Journal, 94:815-820

Nitrogen use efficiency, nitrogen algorithms,improved methods of N fertilization for corn and wheat

ONLINE since 1996, Last update: March 30, 2021

DOWNLOADS

Nitrogen Use Efficiency Defined

N, P, K, and S World Use Efficiencies and Cycles (P and K fertilizer calculations)

Nitrogen Cycle (Bumper stickers)http://nue.okstate.edu/N_cycle.html

Nitrogen Fertilizers

Ammonia losses from Urea +NH3 Loss Calculator

Nitrogen Fertilization Methods

Nitrogen Deficiencies

Nitrogen Uptake in Corn and Wheat (Growth Stages)

Yield Goals, YG Prediction

Can grain protein be predicted ?

Growing Degree Days and INSEY

MESONET Files

Nitrogen and Weather

NUE Science Network

NUE in Corn, Wheat, and Rice

World Wheat, Corn, and Rice

Nitrate Critical Levels and Age of Water

Alternative Product Evaluation

History of GreenSeeker Sensor

VRT Application Equipment

Hand Held Sensor History
(2 pages)

Dr. Norman Borlaug
The Green Revolution

Experiment Stations, Plot Research

RESEARCH HIGHLIGHTS

>50% NUE?
Our Approach

1. Resolution for Precision Agriculture

2. In Season Prediction, Wheat Yield

3. In-Season Prediction, Corn Yield, Case for by-plant N

4. Response Index

5. Independence of Yield Potential and N Response

6. Nitrogen Fertilization Algorithm

7. Benefits of Using this Technology

8. Yield Goals

9. Sensors Developed by OSU

10. Cotton Research

11. N Fertilization Approaches

12. Farmer Experiences and
Case Studies

Documentation

Journal Publications

Posters

Conferences and Workshops

Society and Meeting Presentations

Extension of the Concept

Library of Yield Prediction Equations

Undergraduate and Graduate Classes

Journal Publications, Nitrogen Use Efficiency

2021 NUE Conference August , Lincoln, NE

ALL NUE Conferences

FACT: 20% increase in NUE for the world is worth
>25,863,741,747

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?

Sensor Based Nitrogen Rate Calculator, on-line since 2002

Response Index versus Sufficiency

How can the SBNRC Help You?

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

Wheat Grain Protein Optimizer (option 4)

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

Tribute to Dr. Robert Westerman, Dr. John Solie and Dr. Marvin Stone

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

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

North Dakota State University

Australia

Chinese National Academy of Sciences

CIMMYT, India

Saskatchewan, Canada

OSU MS and Ph.D. Graduate Students, 1991-present

Now over 117 OSU Graduate Students Have 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

By-Plant Yield Prediction in Corn Production Systems

Predicting By-Plant Corn Yields

Precision Ag Equipment

Nitrogen Use Efficiency, Facts and Figures

NUE Facts and Figures

Use of sensor CV's for improving mid-season Nitrogen Rate Recommendations

Can sensor CV's assist in refining fertilizer N?

Hand Held GreenSeeker Sensors

Hand-Held GreenSeeker Sensors

Nitrogen Use Efficiency

The Case for By-Plant Management

Oklahoma Soil Fertility Handbook, 2006

OSU Soil Fertility Handbook

Long Term Soil Science Fertilizer Experiments

OSU Long-Term Experiments

Bed Planting 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

OUR WEB SITES

Regional Precision Agriculture Trial for 2005

Collaborative Research Program for Corn Production

VRT Trials, 2002-2005 and RESOLUTION 2004

Field Scale VRT Trials 2003

MEXICO 2002 Results

General NFOA Presentation

Corn Research

Research Highlights

Soil Fertility Research and Education Advisory Board, Checkoff Presentations

Leaf Orientation and Seed Placement

There is no man so good, who, were he to submit all his thoughts and actions to the laws, would not deserve hanging ten times in his life. Michel De Montaigne

OSU Soil/Plant Sample Grinder

OSU Plant/Soil Grinding Procedures

Feeding Our World

NASA (CO2)

Eddy, Guatemala

Honduras, Stalk collection

El Salvador, Hand Planting

email: bill.raun@okstate.edu

Contributors