Jacob Hamilton Shreckhise
404 A Clay Circle
Blacksburg, VA 24060
PhD Horticulture Expected May 2017
Dissertation: Assessing phosphorus chemical fate and improving phosphorus use efficiency for containerized nursery crops
Co-Advisors: Dr. Alex Niemiera and Dr. Jim Owen
B.S. Environmental Horticulture May 2013
Overall GPA: 3.96/4.0
In major GPA: 4.0/4.0
Current Research Objectives
To determine the concentration and form of phosphate in pore-water of lime- and micronutrient-amended and un-amended soilless substrates used to produce containerized crops when fertilized with liquid nitrogen, phosphorus and potassium.
To determine the minimum concentration of phosphorus needed in pore-water to produce maximal growth of selected woody ornamental taxa in containerized crop production.
To determine the controlled-release fertilizer-phosphorus rate required to maintain minimally sufficient pore-water phosphorus concentrations for optimal growth of containerized nursery crops
Woody Landscape Plants Teaching Assistant under Dr. Alex Niemiera August 2013-May 2015; January 2011-December 2011
- Instructing an undergraduate level plant identification lab
- Informing students on how to properly identify and differentiate woody plant species
- Creating, distributing and grading weekly quizzes
Herbaceous Landscape Plants Teaching Assistant under Dr. Holly Scoggins March-May 2013
- Describing unique identification features of over 100 herbaceous perennials
- Supervising and grading weekly quizzes
Floral Design Teaching Assistant under Dr. Alan McDaniel and Ms. Barbara Leshyn August 2010-May 2013
- Critiquing floral arrangements and teaching student the elements of design
- Processing and preparing floral material
Graduate Research Assistant under Dr. Jim Owen May 2015-present
- Installing filter socks to reduce sediment and nutrient runoff at container nursery
- Measuring saturated hydraulic conductivity using UMS KSAT software
Undergraduate Researcher under Dr. Alex Niemiera June 2011-Aug. 2013
- Researched the effect of pH on urea hydrolysis in pine tree substrate
- Organized and performed lab experiments
- Collected and analyzed data
Experiment Coordinator for Scott’s Fertilizer Company under Dr. Alex Niemiera June 2011-Aug. 2012
- Applied specified fertilizer rates to tested container plants
- Communicated with company’s area representative on project specifics
- Measured growth indexes, substrate solution pH and electrical conductivity
Extension call on irrigation management for a container nursery July 2015
- Taught growers how to measure leaching fraction in a nursery setting
- Demonstrated measurement of irrigation distribution uniformity
Workshop Leader for 4-H Convention at Virginia Tech July 2011
- Taught 4-H students key identifying features of woody landscape plants
- Discussed the importance of scientific nomenclature
- Examined students’ plant identification knowledge upon conclusion of workshop
Judge for the VA State FFA Convention at Virginia Tech July 2011
- Judged cutting propagation technique of competitors
- Processed flowers for corsage design competition
Summer Foreman and Nursery Manager at Shreckhise Shrubbery Sales and Landscaping June 2005-Aug. 2010
- Maintained irrigation system and fertilization of nursery crops
- Assisted customers in developing their home landscape
- Supervised work crews and installed residential landscapes
Publications and presentations
- Niemiera, A.X., L.L. Taylor, and J.H. Shreckhise. 2014. Urea hydrolysis in pine tree substrate is affected by urea and lime rates. HortScience 49(11):1437-1443.
- Shreckhise, J.H., J.S. Owen, Jr., J.C. Brindley, A.X. Niemiera. 2015. Evaluating growth response of three containerized ornamental taxa to varying low pore-water concentrations of phosphorus. HortScience 50(9):S24-S25.
- Shreckhise, J.H., J.S. Owen, Jr., A.X. Niemiera. 2015. Predicting pH of Sphagnum peat moss and pine bark substrates amended with ground and pulverized dolomitic limestone. Southern Nursery Assoc. Res. Conf. (in press)
Outreach and Extension Publications
- Shreckhise, J.H., J.S. Owen, Jr., J.C. Brindley, A.X. Niemiera. 2015. Evaluation of phosphorus nutrient use efficiency in several woody ornamental nursery crops. Virginia Nursery Landscape Assoc. Nwsl. 85(3):48-51.
- Shreckhise, J.H. News – IPPS Southern Region Meeting. Virginia Nursery Landscape Assoc. Nwsl 84(4):8-10.
Presentations Delivered at Professional Meetings
- Shreckhise, J.H. Predicting pH of Sphagnum peat moss and pine bark substrates amended with ground and pulverized dolomitic limestone. Southern Nursery Assoc. Res. Conf.
- Shreckhise, J.H. Growth Response of Three Containerized Ornamental Taxa to Varying Low Pore-water Concentrations of Phosphorus. Am. Soc. Hortic. Sci. Southern Region.
- Owen, J.S., Jr., J.H. Shreckhise, A. Niemiera, M. Eick. 2015. Rethinking phosphorus fertility in container nursery production: Identifying the fate and lowest rate of phosphorus. Horticultural Research Institute – $18,000
- Shreckhise, J.H. International Plant Propagators’ Society, Southern Region Travel Grant.
- Shreckhise, J.H., J.S. Owen, Jr., A.X. Niemiera, and J. Brindley. 2014. Evaluation of phosphorus nutrient use efficiency in several woody ornamental nursery crops. Virginia Agricultural Council – $16,890.
- Sidney B. Meadows Scholarship Endowment Fund 2012
- Julian H & Margaret S Gary Scholarship (3×) 2010; 2011; 2012
- George W. Shreckhise Memorial Scholarship (3×) 2009; 2011; 2012
- President’s Horticulture Scholarship 2011
- Cyrus McCormick Scholarship 2011
Awards and Honors
- Southern Nursery Association Bryson L. James Student Research Competition. 2015. Second Place, Ph.D. Category July 2015
- American Society for Horticultural Science Norman F. Childers M.S. Graduate Student Paper Competition. First place. January 2015
- 2013 Outstanding Senior Award for Horticulture May 2013
- President of Pi Alpha Xi, the Honor Society for Horticulture April 2011-May 2013
- American Society for Horticultural Science Outstanding Horticulture Student April 2012
- Sixth place in a national landscape installation competition at Student Career Days March 2012
- Dean’s List 2009-2013
- Third place in a national woody plant identification competition at Student Career Days 2011