Synopsis The growth response from increased light on alfalfa, red clover and birdsfoot trefoil seedlings in growth chambers was curvilinear for tops and linear for roots. Root growth was affected more than top growth by reduced light intensity. Increasing temperatures from 60° to 90° F. reduced seedling growth. Decreasing soil moisture reduced seedling growth correspondingly. Red clover was affected less by reduced light than alfalfa and birdsfoot trefoil. There was less growth of birdsfoot trefoil than the other two species.

No abstract

Synopsis Alfalfa, red clover, and birdsfoot trefoil seedlings gave a linear growth response to light treatments ranging from 2,400 to 14,400 foot‐candle‐hours per day. During the period from 41 to 56 days after seedling emergence, under the highest light treatment, red clover made 20% more top growth and 50% less root growth than alfalfa. Under the lowest light treatment the top growth of red clover was approximately twice that of alfalfa.