See what Mark Seed can do for you. Your SCN solution & more. Mark Seed Company recognizes agriculture is an ever changing, evolving industry. Every year, we pride ourselves on being able to offer new & developing technologies to our growers. Our top notch research & technology team has kept pace by bringing new & better products to the market for over thirty-five years. Co-owners Mark & Steve Terpstra have been in the industry their entire lives. "We love the seed business", said Steve. According to Mark, "our father instilled the drive to continually seek new & improved product for our grower customers. His legacy guided us through the discovery and perfection of Cyst Tech® soybean seed...the seed that will change the face of Midwestern agriculture".