Doris BaxterDoris Baxter retired in 1982 as Officer-In-Charge of the USDA Federal Seed Laboratory in Sacramento, California. Throughout her long career she was active in all aspects of seed testing, but specialized in purity testing and taxonomy associated with eed testing. After many years of conducting federal seed testing workshops for purity analysts across the United States, she wanted to pass on her expertise in purity testing to successive generations of analysts, thus, the origin of this book. Doris earned her Master of Arts degree in botany from the University of Michigan. Read More Read Less