The cost of a seed test is small compared with your investments in land preparation and harvest. Seed tests are required by law if you sell seed. But it's also important to know what to expect when you plant "home-grown" seed.
Everson, L. E.
"Make Sure Your Seed is Best by Test,"
Iowa Farm Science: Vol. 13
, Article 2.
Available at: https://lib.dr.iastate.edu/farmscience/vol13/iss6/2