FACTORS INFLUENCING GROWTH AND SUMMER DORMANCY IN TARAXACUM KOK-SAGHYZ

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Abstract
A setback in rosette diameter and leaf number was observed in both first and second year Taraxacum kok-saghyz plants at a definite stage in the plant ontogeny whatever the time of planting. This condition was evidently not entirely synonymous with the 'summer dormancy' of Russian workers as it did not involve complete loss of leaves, nor endure so long. The length of the 'dormant' period, which occurred at the time of reproduction and could be delayed, although not prevented by removal of flower buds, varied from about two to eight weeks. Various external modifications of environment had no appreciable effect on its onset. Watering and disbudding each increased the total fresh weight yield. Watering affected rosette diameter more markedly than it did root weight; disbudding affected both to approximately the same extent. Shading was not beneficial to growth.

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