Physical & Varietal Purity Analysis
The objective of the Physical analysis is to determine what proportion of the seed sample is pure crop and what is inert matter, weed seed, and other crop. The remainder of the submitted sample is examined for the presence of noxious weed seeds. This test is completed on most crops.
The Varietal Purity analysis is completed in addition to the physical analysis. This test is a visual test used to determine if any seeds of a different variety have been inadvertently mixed with the variety being tested. This test is most commonly completed on soybeans and oats.