University Courses
For the past 5 years I have taught SOIL
4111-Introduction to
Precision Agriculture, this course was first taught by one of my
mentors Dr. Pierre Robert.
In SOIL
4111
students are introduced to essential aspects of
precision agriculture including: soil/landscape and crop spatial
variability, new technologies such as GIS, DEM, GPS, sensors, variable
rate machinery, precision agriculture software, remote sensing,
geostatistics, sampling,
experimental designs, precision integrated crop management, data
acquisition, processing, and management; and socio-economical and
e-marketing aspects.
I also helped in the development of a
new graduate level soil science course: SOIL
4005/5005 - Laboratory and Field
Techniques in Soil Science.
Additionally, I have given
guest lectures and organized
recitation sessions for courses in Basic Soil Science, Wetland Soils
and Vadose Zone Hydrology.
What is Manure Worth?
The Manure
Value Calculator
The "What is Manure Worth?" Excel spreadsheet has been developed over
several years to calculate the value of manure as a replacement for
commercial fertilizers under a range of application rates and methods,
crop nutrient needs, application costs, and fertilizer prices. It was
recently revised to make it more user-friendly. For
more information please check the project's
website.
Workshops
Small-group workshops are underway across the state for farmers and
other agricultural professionals. Presenters will explain the factors
impacting the economic value of manure and how to maximize manure
value. Participants will learn how to use the “What is Manure
Worth?” worksheet and use their own data to analyze the
economics of their own manure management practices. Participants are
recruited by local UMN extension staff, County Feedlot Officers,
producer organizations, and staff of Soil and Water Conservation
Districts. If you would like to host a workshop, see the workshop
brochure or contact me. For more information about the 2010
workshops please check the calendar.
Grower Learning Groups
In addition to working with
Minnesota’s growers on
the on-farm Nitrogen trials, I had the unique opportunity to help
farmers conduct research on their own farms. During 2005-2006, the UMN
funded my work with the Grower Learning Groups (GLG). The idea was to
collaborate with farmers to develop research questions based on the
farmer’s
management concerns, set-up statistically valid on-farm experiments,
and perform the statistical analyzes to test the farmer’s
hypotheses. This experience was very rewarding, farmers were developing
their own research questions and the following cropping season they
were making management adjustments based on their on-farm and regional
research findings.
Here is an example of one of
the outreach projects that I got
involved as part of the Precision Agriculture Center: Midwestern
Water Quality Project (CAP).

Contact Information
Office Address:
Soil
Science, Office S505
Ph: +1 (612) 625-4731
Fax: +1 (612) 625-2208
jahernan at umn.edu
Mailing Address:
Borlaug Hall, Rm. 439
Univ. of Minnesota
1991 Upper Buford Circle
Saint Paul MN, 55108