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Light is energy released by the sun to support all types of plant and animal life. This energy is transmitted as electro magnetic spectrum which influences every activity on the face of this planet. Artificial light represnets man's efforts to devise a partial substitute for sunlight. Modern artificial electric light has contributed to every phase of our society and serves as a tool for agricultural research.
characteristics of light and some features of plant growth
Kalbfleisch, W. 1959. CHARACTERISTICS OF LIGHT AND SOME FEATURES OF PLANT GROWTH. Canadian Agricultural Engineering 1(1):21-21.
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