Abstract
In laboratory studies cold-hardened ladino clover stolons and alfalfa roots arid crowns were injured less severely when cooled slowly (2[degree]F/hr) from 36 to 10 and 5[degree]F than when cooled rapidly (7 to 10[degree]F/hr) to the same temperature. Undercooling of 4 to 6[degree]F was observed with slow cooling and a freezing point of 27[degree]F was observed. Undercooling was not detected under conditions of a rapid drop in temperature and the freezing point was indistinct.

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