Jan. 15, 1921 



Freezing of Fruit Buds 



661 



Table IV. Result of natural freezes — Continued 



SUMMARY 



(1) Efficient orchard heating demands an economical use of labor and 

 fuel and requires knowledge of the temperatures that cause injury to the 

 buds. 



(2) This paper contains the results of seven years' experiments in 

 freezing 24,000 apple, peach, cherry, and apricot buds, together with a 

 record of the natural freezes that occurred in the orchards near Logan, 

 Utah, during the same period. 



(3) Ben Davis apple buds in full bloom have experienced temperatures 

 of 25 , 26 , and 27 F. without injury, but 28 usually kills about one- 

 fifth. Twenty-nine degrees or above are safe temperatures. Twenty- 

 five degrees kills about one-half and 22 about nine-tenths. On several 



