Unhulled white sweet clover seeds return larger yields of bay and greater profits than do similar scarified seeds.

Seedlings resulting from unhulled seeds are more resistant to low temperatures than seedlings coming from scarified seeds.

Sweet clover seedlings are most resistant to cold when in very early stages of development. They become more susceptible with advance in age.

High soil moisture exerts a protective influence on seedlings which are in a susceptible stage of growth at the time of exposure to low temperatures.

There is some evidence, although not conclusive, that seedlings coming from scarified seeds are more active physiologically than those coming from unhulled seeds.