1941 Yearbook of Agriculture 



Figure 5 is a record of the average 

 number of days without killing frost. 



This information is directly related 

 to soils in this way. Poorly drained soils, 

 although otherwise desirable for corn 

 production, are usually too wet on May 

 20 to plant corn. For that reason, the 

 crop must be planted later and the yields 

 on the average will not be satisfactory. 



Harvest dates of apples, potatoes, 

 pumpkins, corn, tomatoes and many 

 other crops are related to the first 

 killing frost in the fall. 



The map in Figure 7 portrays the 

 average first killing frost in the fall as 

 September 10 in the White Mountains 

 and September 30 in southern New 

 Hampshire. 



Some soils occur in frost pockets, near 

 large bodies of water, or on various 

 facing slopes in such a way as to pro- 

 duce sharp local variations in growing 

 season from field to field. 



Before large amounts of money are 

 invested in new enterprises which are 

 sensitive to frosts, the local as well as 

 general factors which influence the grow- 

 ing season should be thoroughly studied. 



I SEP! 50 



OCT 10 



19U Yearbook of Agriniltui 



Figure 6, at the left, shows the average dales of the last killing frost in 

 the spring. Figure 7 records the elates of the first killing frost in the fall. 



