At a Glance

The Cook soybean cultivar is a Maturity Group VIII (Relative maturity 8.1). Cook has a determinate growth habit, purple flowers, tawny pubescence and tan pod walls. Seeds are yellow with dull coats and black hila.

Although Cook matures around the same time as Kirby and Coker 6738, Cook’s seed weight is 27% greater than Kirby and 20% greater than Coker 6738. It is similar in protein and oil content to Kirby.


Cook soybeans are resistant to major races of frogeye leafspot and has moderate resistance to southern root knot nematode. It also is resistant to stem canker and powdery mildew. It is susceptible to peanut and Javanese root knot nematodes and to the soybean cyst nematode.


Cook was developed by H.R. Boerma, R.S. Hussey, D.V. Phillips, E.D. Wood and S.L. Finnerty at the Soybean Improvement Center at the University of Georgia Agricultural Experiment Station in Athens, Ga. Cook is a soybean variety that is protected under the Plant Variety Protection Act, which means it can only be sold by individuals licensed by the University of Georgia Research Foundation (UGARF) and Georgia Seed Development (GSD).


Dr. Roger Boerma

Dr. Roger Boerma

Roger was born and raised on a grain and livestock farm in central Illinois. He earned his Bachelor of Science degree in General Agriculture from Illinois State University and his Master of Science and his Doctorate in Plant Breeding and Genetics from the University of Illinois.

He joined the University of Georgia as an Assistant Professor of Agronomy in 1973 and spent most of his career at UGA as becoming a Distinguished Research Professor and Director of the Center for Applied Genetic Technologies. His accomplishments include developing 25 soybean varieties for Southeastern producers, publishing 171 scientific journal papers and contributing chapters to numerous books. He has received six plant variety protection certificates, six patents, and has four patents pending. A popular conference speaker, he also has directed and mentored more than 30 students and associates working on advanced degrees.

Roger has used his understanding of agribusiness and the challenges facing farming to improve crops that contribute to Georgia’s agriculture industry. Roger was named Executive Director of the Georgia Seed Development Commission in 2011. Under his leadership, the Commission develops foundation plant material production and markets seed and plant materials designed to improve crop yields for growers in Georgia and across the United States.