10 



N. H. AGE. EXPERIMENT STATION. 



[Bulletin 



probably, as at any time during winter and observations were 

 made on the depth of freezing in each plot which gave the fol- 

 lowing figures: 



TABLE No. 4. 



Depth of Freezing Lower Woodman Orchard. 

 March 6, 1916. 



Chart No. 2 shows this in a graphic way and shows Plots 6 

 to 10 are frozen several inches less than the others and it is true 

 that there was a much heavier covering on these plots than on 

 the first five. Plot 2 seems to be an exception and it would not 

 appear just why it should be frozen more deeply than any of the 

 others. No actual temperature records were made during the 

 winter of 1915-1916 but the depth of freezing shows roughly 

 what would have been recorded. The orchard was then all 

 plowed except Plots 1 and 3 in the fall of 1916 so that there was 

 no covering to protect the ground as in the previous winter, and 

 the temperatures ran much the same in the various plots. 



