EFFECT OF LIGHT INTENSITY ON THE PHOTOSYNTHETIC EFFICIENCY OF TOMATO PLANTS

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Abstract
Different light intensities were constantly maintained in three blocks of tomato plants. (1139.9, 583.1, and 261 average daily foot candles). The leaf area was detd. by the factor Y (area) = 3.16 + 0.417X + 0.307X2; X being the length of the leaf from the base of its first leaflets to the tip of the midrib. The plant materials manufactured were determined by the "Modified Sachs Method." There were great differences in the growth rates, leaf areas, fruit and photosyntate production of the several groups of plants exposed to the different light intensities, and there were equally great variations between the individual plants within the same group.