Agronomists
Dr. Zack Ogles
Manager of Agronomy
Dr. Zack Ogles is a graduate of Auburn University where he received his M.S. degree in Horticulture and his PhD in Agronomy and Soils. In 2016, Dr. Ogles joined Tessenderlo Kerley as an Agronomist where he was responsible for the Southeastern United States. Since that time he has transitioned into the role of Manager of Agronomy with responsibilities throughout North America. Dr. Ogles specializes in the area of soil fertility and crop production.
Throughout his career Dr. Ogles has had the opportunity to work with a diverse array of crops and management systems. He has experience with numerous vegetable crops, row crops, as well as turf grasses. The goal of his research program with Tessenderlo Kerley fertilizers is to provide interested growers with relevant, up-to-date information that will increase productivity and profitability in a sustainable manner.
Over the past five years Dr. Ogles has conducted many trials geared towards optimizing conventional and organic fertigation practices in vegetable production. Specific nutrients included in this work are calcium, sulfur, nitrogen and magnesium. As of late, much of his research has shifted into the area of nitrogen stabilization and use efficiency. He currently has a patent pending for nitrification inhibition, which is of particular interest due to environmental impact of nitrates as well as the economic losses felt by grower.
Wesley Haun, CPA, CCA
Agronomist – Sales & Research
Wes has a Bachelor of Science Degree in Agricultural Mechanization. Masters Degree in Plant & Soil Science – University of Tennessee. His professional certifications include Certified Professional Agronomist, Certified Professional Soil Scientist, and Certified Crop Adviser.
Wes coordinates soil fertility and crop nutrition research with various research organizations in United States of America and internationally. He leads seminars, publishes technical bulletins, and newsletters on applications of Sulphur Bentonite and micronutrients. His training and publications incorporate research results which demonstrate agronomic benefits of a complete plant nutrient management program that includes products offered by Tiger-Sul, Inc. He has a diverse agronomy background that spans retail sales/consulting at farm gate to technical agronomist at regional, national, and international levels.
David Annis, Jr., CPA, CCA
Market Development Manager
David has a Bachelor of Science Degree in Plant Protection and Pest Management from University of Arkansas, Master of Science in Agriculture from Arkansas State University. His professional certifications include Certified Professional Agronomist (CPA) and Certified Crop Advisor (CCA) for over twenty years.
David works with fellow agronomists, dealers, and farmers to help them manage their soil fertility and maximize their profitability. He conducts strip trials, trainings, and publishes newsletters and technical bulletins on applications of sulphur bentonite and micronutrients. Prior experience includes Texas A&M University, The Samuel Roberts Noble Foundation and University of Arkansas as a consultant, researcher, specialist, and educator in the areas of agronomy, entomology, plant pathology, plant growth regulators and precision agriculture. David has focused on practical agronomic solutions, research and education for over thirty-five years.