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Some Effects of Light Intensity, Temperature, and Soil Moisture on the Growth of Alfalfa, Red Clover and Birdsfoot Trefoil Seedlings¹

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.

² Former Graduate Research Assistant, Purdue University, now Extension Agronomist, The Ohio State University, Columbus, Ohio, and Professor of Agronomy, Purdue University, Lafayette, Ind.

Received for publication August 7, 1956.

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