ot 9.2 inches, which must be supplied from inigalion if maximum corn 

 ) ields are to be obtained. For an average year, the best production of forage 

 crops at Concord will require an additional 5 inches of water supplied from 



irrigation 



1941 Yearbook of Agriculture 



Figure 1, on the left, shows the average annual precipitation in inches in 

 New Hampshire, while Figure 2, at right, shows the average warm season pre- 

 cipitation in inches in New Hampshire from April to September, inclusive. 



Average annual precipitation in New Hampshire varies from 38 inches 

 in the southwestern and northern parts of the State to 46 inches in the 

 extreme northern part. (Figure 1.) Several mountain peaks receive about 

 twice these values. Average warm season precipitation (April through 

 September) varies from 20 to 30 inches. (Figure 2.) 



Temperature 



The average annual temperature for New Hampshire varies from 40 de- 

 grees Fahrenheit in the northern part of the State to 45 degrees in the 

 southern part. January temperatures average from 12 to 22 degrees, in- 

 creasing fairly regularly from north to south. (Figure 3.) 



In the north the 12-degree average January temperature and the 66- 

 degree average July temperature (Figure 4) affirm the statement that 

 the cold temperature in the northern areas helps in the accumulation of soil 

 organic matter. The average annual temperature of 40 to 45 degrees is 

 approximately the temperature maintained in home refrigerators to preserve 



11 



