Purity Analysis* (P) Determines percentage of pure seed, inert matter, other crop, and weed seed present in the sample submitted for analysis. Identification is made of the other crop and weed seed found and reported out at the rate of occurrence.
Noxious Exam* (N) Determines rate of occurrence for any prohibited or restricted noxious weed seeds present in the sample. Only the presence of weed seeds noxious to South Dakota are determined the South Dakota noxious test while the presence of any weed seed considered noxious somewhere within the continental United States is determined in the USA Noxious Test. Request USA if seed is to be sold out of state. Does not include UGS check!
Germination Test* (G) Determines percentage of normal seedlings that develop under ideal growing conditions. The percentage of hard seed or dormant seed is also determined when present, and reported as a portion of the total viable percentage. (Also know as standard or warm germ.)
Tetrazolium Test (TZ) A rapid (24–48 hr.) chemical viability test which can be used to estimate the results of the germination test; however, it cannot be used as a legal substitute for the germination test. Results of the TZ test will be phoned, faxed, or e-mailed to the customer when completed.
Accelerated Aging Test (AA) A high humidity, high temperature stress test that is a good indicator of vigor in soybean seed. This test should be conducted in conjunction with a standard germination test.
*Required for sale in South Dakota, SDCL 38-12A.
Cold Test A high humidity, low temperature stress test that has proven to be useful in determining the vigor level of seed corn.
UGS Check A check for undesirable grass seed (on a noxious sample size) in lawn and turf seed/mixtures as indicated in the Delaware, Maryland, New Jersey, Pennsylvania, Virginia, and West Virginia State Seed Laws.
Rough Purity An unofficial test to determine purity of uncleaned seed lots. Used primarily for chaffy grasses (i.e. bluestems, etc.) Only one-fourth of the official purity sample size is tested.
Seed Fill Check A quick test to determine a rough percent of pure seed in samples of bluestems and Indiangrass taken from unharvested fields. Assists the client in determining if harvest is economically feasible.
Electrophoresis This test is used to identify/verify wheat, oats, barley, and millet varieties. Consult the Electrophoresis page or contact the Seed Testing Lab for more information.
Seed Count/Pound The number of seeds per pound will be determined on the sample submitted for analysis by an electronic seed counter. Performed upon request only.
Quick Test (Rush) Samples submitted for analysis are normally tested in the order in which they are received. The request for a quick test will give that sample first testing priority ahead of other samples.
Uncleaned Samples The Seed Testing Laboratory reserves the right to refuse to test screenings or very dirty, unclean samples. If samples of this type are accepted for testing, labor charges will be assessed at the rate of $30.00 per hour.
Smut Test Barley smut tests are available on samples sent to the Seed Testing Laboratory. Research has indicated that a direct relationship exists between the percent of seeds infected with smut and percent of yield loss when infection rates exceed 5 percent.
Sweetclover Species Purity Test Chemical test to determine the percentage of white and/or yellow sweetclover in a seed lot.