What is the "seed purity percentage" a measure of?

The "seed purity percentage" specifically refers to the percentage of pure seeds found within a seed lot. It is calculated by assessing the total amount of pure seed in relation to the total weight of the seed lot, while excluding any inert matter (such as dirt or debris) and seeds from other species. This measure is critical in seed testing and quality assurance, as it helps users understand the quality and viability of the seeds they are purchasing. A higher purity percentage indicates a higher quality of seed, which is essential for successful planting and farming practices.

This definition underscores the importance of knowing what constitutes pure seed, as it directly impacts germination rates, crop yields, and overall agricultural productivity. This measure does not concern the germination potential, the overall weight of the seed lot, or size comparisons of seeds, which distinguishes it as a specific indicator of seed quality.