Wheat Investigations. 9 



matic conditions given by Carlton 15 for the principal wheat 

 growing centres in Russia and in the United States shows that 

 the total precipitation for the growing season at Presque Isle — 

 16.05 inches — is considerably higher than at the principal wheat 

 growing points of the Russian prairies and generally higher than 

 at points in the Great Plains. While this alone would not con- 

 stitute a specially detrimental feature in connection with the 

 cultivation of wheat, a consideration of the peculiarities of the 

 Aroostook growing season indicates that the distribution of the 

 rainfall in the different months of the season may have some 

 effect upon the quality of Aroostook grown wheat. The time 

 of seeding small grains in Aroostook County extends usually 



TABLE 1. 



Temperature, Rainfall in Inches and Number of Clear Days 

 for the 5 Growing Months of the Seasons 1913-1919. Re- 

 corded at Presque Isle, Aroostook County. 











Tear 









Temperature 

 Precipitation 













Month 















No. clear days 



1913 



1914 



1915 



1916 



1917 



1918 



1919 



Average 



f 



Mean Temp. 



48.60 



53.19 



49.50 



50.82 



43.13 



51.00 



50.50 



49.46 



May \ 



Precipitation 



3.53 



2.74 



4.05 



3.45 



3.90 



4.00 



3.32 



3.57 



l 



No. clear days 



15 



18 



10 



12 



8 



17 



11 



13 



f 



Mean Temp. 





56.03 



60.60 



59.65 



59.84 







59.03 



June i 



Precipitation 



1.20 



4.80 



1.95 



2.17 



7.67 





1.26 



3.18 



I 



No. clear days 



18 



12 



12 



10 



10 





15 



13 



f 



Mean Temp. 



69.30 



63.55 



64.10 



65.00 



67.95 







65.98 



July \ 



Precipitation 



5.18 



2.23 



3.40 



3.68 



2.56 





3.80 



3.48 



l 



No. clear days 



9 



24 



IS 



17 



15 





14 



16 



f 



Mean Temp. 



61.40 



60.17 



61.80 



71.90 



66.90 





61.00 



63.86 



August < 



Precipitation 



3.01 



2.35 



3.50 



1.70 



5.30 





1.75 



2.94 



I 



No. clear days 



20 



22 



15 



11 



18 





11 



16 



f 



Mean Temp. 



53.20 



55.80 



56.45 



58.92 



53.05 





53.60 



55.17 



September < 



Precipitation 



2.01 



2.10 



3.25 



4.05 



1.41 





4.56 



2.90 



I 



No. clear days 



19 



19 



19 



15 



19 





13 



17 



Totals for grc 



wing season: 



















Total PrecipitE 



ition 



14.93 



14.22 



16.15 



15.05 



20.84 





14.69 



16.05 



Total No. cles 



r days 



81 



95 



74 



65 



70 





64 



75 



Average mean 



temperature of 



















growing se 



ason 



58.10 



57.75 



58.49 



61.26 



58.18 





55.00 



58.70 



15 Carlton, M. A. The Small Grains, 1916, pp. 699. The MacMillan 

 Co., New York. 



