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Precision Ag Webinar Series

Precision Ag Webinar Series is Sponsored by USDA-NRCS On-Farm Trials Program.


February 08. 2021

Time:  9:00-9:50 am (PST) Monday, February 8


We have conducted on-field nitrogen fertilizer experiments on rainfed winter wheat with variable rate application since 2016 on 4 farms across Montana. The experiments have allowed us to construct models to predict grain yield and protein and thus assess different fertilizer application management strategies. Site-specific application of top-dress nitrogen fertilizer in spring is almost always the profit maximizing approach for application. Sometimes, a full-field uniform rate selected with our models will produce more profit, but the models indicate that the site-specific variable rate application is always superior to the full-field uniform rate that the producer would have selected. The cost of having the experiment in the field was also assessed.

Presented by: Dr. Bruce Maxwell

Dr. Bruce Maxwell Dr. Maxwell is a Professor of Agroecology, having spent over 20 years of Research on Precision Agriculture as applied to on-farm experimentation and maximizing producer profits from site-specific input application.

Time: 10:00- 10:50 am (PST) Monday, February 8

Presented by: Dr. Dave Huggins


Spatial Variability and Temporal Stability: Keys to Precision Farming

Understanding time and space is no easy matter, but that is what precision agriculture is about! Currently many farmers are collecting relevant data from their fields including crop yield and quality, however, it is a challenge to use these data effectively to make precision farming decisions. In 1998, the WSU Cook Agronomy Farm near Pullman WA was initiated to further understand the spatial and temporal variability of crop and soil properties including crop yield and quality, soil carbon sequestration, soil acidification and other factors at a field scale. In this talk we summarize the spatial variability of crop data and present analyses useful for evaluating if precision N management goals are met. In addition, we grapple with temporal variability and field differences in the predictability of outcomes that would aid the design of N management zones.


Dr. David Huggins David Huggins is the Research Leader of the USDA-ARS Northwest Sustainable Agroecosystems Research Unit in Pullman WA and Director of the Cook Agronomy Farm Long-Term Agroecosystem Research (LTAR) site.

February 09

Time: 9:00-9:50 am (PST) Tuesday, February 9


This session will guide you through the basics of designing an on-farm trial in a free software R. We will discuss common issues around trial design and how to handle them. With a boundary file, you can design a trial and output it as a shapefile. Materials for this lesson are available online and can be accessed after the talk.

Presented by: Brittani Edge

Brittani Edge Brittani Edge is a PhD student at the University of Illinois at Urbana-Champaign specializing in precision agriculture and on-farm research. She worked with others at UIUC to design and host a workshop for producers who want to learn more about designing and analyzing their own on-farm trials.

Time: 10:00-10:50 am (PST) Tuesday, February 9


GPS, on-the-go sensors, aerial imagery (drone, fixed wing, etc.), satellite imagery, soil sensors allow farmers to conduct research alone or with researchers. This presentation will discuss with farmers, consultants, and extension personnel about participating on-farm research, and how growers can utilize their GPS and yield monitors to establish and complete their own on-farm trials. We will also present an opportunity to collaborate with WSU researchers in the next three years to get your started.         

Presented by: Aaron Esser & Haiying Tao           

Aaron Esser is a regional Dryland Extension Specialist. Aaron graduated from the University of Idaho with a bachelor’s degree in Agricultural Economics and a Masters in Plant Science and really enjoy the interaction. Aaron has been with WSU Extension for 23 years mostly focused on dryland agricultural production in the Lincoln-Adams Extension Area. Since joint WSU, Aaron has helped growers design, establish and complete well over 100 scientifically replicated on-farm trials across the region. Today, Aaron’s extension role has been expanded to manage the WSU Wilke Research and Extension Farm.

Dr. Haiying Tao Haiying Tao is an assistant professor of Soil Fertility and Residue Management in the Department of Crop and Soil Sciences at WSU. Her current research and extension focus on soil fertility and crop residue management, soil health, digital agriculture, land application of manure, nutrient management planning. She is the director of WSU Farmers Network

February 10

Time: 9:00-9:50 am (PST) Wednesday, February 10


This presentation will walk through current precision ag technologies and the value they can provide farmers. Using precision ag technologies to support on-farm research will also be discussed.      

Presented by: John Fulton  

Dr. John Fulton Dr. Fulton is a Professor in the Food, Agriculture and Biological Engineering Department at The Ohio State University (OSU).  His research and Extension focuses on precision agriculture, machinery automation, and use of spatial data to improve crop production and the farm business. 

Time:  10:00-10:50 am (PST) Wednesday, February 10


This session will present simple code for analyzing and reporting an on-farm trial. This will assume you have implemented an on-farm trial and have the yield and the input data. We will introduce some of the basics of creating reports using trial results in R, so that you understand how the reports are made and can edit your own report. However, the template of the report is automated to talk about the trial, the trial data, weather data for the year, and the basic results. Materials for this session are available online and can be accessed after the talk.

Presented by: Brittani Edge

Brittani Edge Brittani Edge is a PhD student at the University of Illinois at Urbana-Champaign specializing in precision agriculture and on-farm research. She worked with others at UIUC to design and host a workshop for producers who want to learn more about designing and analyzing their own on-farm trials.

February 11

Time:  9:00-9:50 am (PST) Thursday, February 11


Real-world application of variable rate when utilizing drones, in field sensors, and other precision technologies. This webinar will demonstrate a producer’s experience in use of sensors and drones for precision applications, as well as utilize microclimate predictions through sensor network for spray timing and operation management. 

Presented by: Andrew Nelson

Andrew Nelson Andrew is a farmer in eastern WA and Software Engineer from Nelson Farms, Inc., and Silver Creek Farms, Inc. Andrew has been an active software engineer consultant for the past 15 years, working on projects in finance, retail, government, and technology companies.  Andrew took over farm operations when moving back to the family farm 8 years ago.  His farm is always looking at new technologies to make his farm more efficient in terms of use of inputs, increase output, or decrease operating time and costs.

Time: 10:00-10:50 am (PST) Thursday, February 11


The WSU AgWeatherNet program has developed a new web- and mobile-app for weather-related agricultural decision support. In this webinar, we will discuss how to use this free platform, current features, and future plans. This will also provide dryland grain producers with an opportunity to suggest features that would make this app more useful for their industry.

Presented by Dr. Dave Brown

AWN Director and Associate Professor of Soil Science

Dr. Dave Brown Dr. Brown directs the WSU AgWeatherNet program, managing staff who maintain a state-wide weather station network and online platforms that deliver agricultural weather-related decision support. His AgWeatherNet research program is focused on agricultural meteorology, particularly questions related to site-specific forecasts and near real-time agricultural decisions. As an Associate Professor of soil science, Dr. Brown’s research focuses on soil sensing, data science, and precision agriculture.


The following Webinar is sponsored by Washington State Department of Agriculture Specialty Crop Block Grant Program..

Washington State Department of Agriculture 


February 23, 2021

Time: 12:00-1:00PM PCT, February 23, 2021


Learn how manure can be transformed into an economically viable fertilizer through concentrating, blending, and pelletizing nutrients. 



   Dr. Pius Ndegwa, Biological Systems Engineering

   Dr. Lisa W. DeVetter, Horticulture

   Dr. Haiying Tao, Crop and Soil Sciences

   Peter F. Alege, PhD candidate

   Qianwen Lu, PhD candidate

“The farmer is the only man in our economy who buys everything at retail, sells everything at wholesale, and pays the freight both ways.”

-John F. Kennedy


WSU Farmers Network

Washington State University
Johnson Hall RM. 171
Pullman, Wa. 99163

Keith Curran   
 (509) 288-2324

Dr. Haiying Tao
(509) 335-4389

“You know, farming looks mighty easy when your plow is a pencil, and you’re a thousand miles from the corn field.”

-Dwight D. Eisenhower