Some people with chest pain have normal or minimal narrowing of heart arteries; in these patients, vasospasm is a more likely cause for the pain, sometimes in the context of Prinzmetal's angina and syndrome X.
You are here. Pure Live Seed. Pure live seed (PLS) is a measure used by the seed industry to describe the percentage of a quantity of seed that will germinate. PLS is obtained by multiplying the purity percentage by the percentage of total viable seed, then dividing by 100.
Seed Source and Rate. Seeding rate depends onseed quality and method of seeding. When planting ina well-prepared seedbed, 10 to 15 pounds of pure liveseed (PLS) is adequate. PLS refers to the amount of liveseed of the desired species in a bulk lot. As an example,100 pounds of bulk smooth brome seed that has a ger-mination of 90 percent and a purity of 95 percent con-tains 85.5 pounds of pure live seed (100 Ã .90 Ã .95 =85.5). If a poor seedbed exists, seeding rates as high as20 pounds.