97 



The following table gives the results of freezing Marianna plum 

 roots: 



Table 33. Showing Relative Resistance to Low Tempera- 

 ture of Year-Old Seedling Plum Roots Grow- 

 ing and in a Thoroughly Dormant 



Condition. 

 Date of Freezing, March 22, 1913. 



Where Stored 



Location 



of 



Root 



Results 



Outside . 



Outside . 



Outside . 



Outside . 



Cold storage. . . 



Cold Storage. 



Cold storage. 



Greenhouse .... 



Top even with 

 surface 



3.5 inches be- 

 low surface.., 



4 inches below 

 surface 



4 inches below 

 surface 



Top even with 

 surface 



7 inches below 

 surface 



7 inches below 

 surface 



Top even with 

 surface 



Very slight in- 

 jury of cam- 

 bium in first 10 

 in. Cortex and 

 cambium 

 jured in 

 mainder. 



m- 

 re- 



Cambium and 

 cortex injury 

 throughout. 



Cambium and 

 cortex injury 

 throughout. 



Cambium and 

 cortex injury 

 throughout. 

 Pith injured 

 slightly in last 

 4 inches. 



Very slight in- 

 jury in cambi- 

 um in first 7 in. 

 Cortex and 

 cambium in- 

 jury in remain- 

 der. 



Slight injury of 

 cambium and 

 cortex through- 

 out. 



Slight injury of 

 cambium and 

 cortex through- 

 out. 



Very severe in- 

 jury of cortex 

 and cambium 

 throughout. 

 Pith and sap 

 wood injured. 



