308 FORAGE PLANTS AND THEIR CULTURE 



and the resulting plants were not protected by snow 

 during the coldest weather. The drilled rows suffered less 

 than the hills. 



Tabulated according to the geographical origin of the 

 strains, the results are shown in the following table : 



AVERAGE MORTALITY OF REGIONAL STRAINS OF ALFALFA 

 PLANTED IN HlLLS AT DlCKINSON, NORTH DAKOTA, 1908-1909 



5 strains from South America . . . 99.6 % 



2 strains from Africa . . 100.0% 



2 strains from Russia 83.9% 



5 strains from Germany 83.1% 



5 strains from France 89.6% 



1 strain from Italy 98.7% 



1 strain from Spain . 100.0% 



4 strains from Arabia 100.0% 



12 strains from Turkestan 72.3% 



3 strains from Mongolia 33.5 % 



2 strains from Canada 45.4% 



2 strains from Mexico . . 85.0% 



18 strains from United States 83.3 % 



10 strains from Utah 90.4% 



1 strain from Colorado 86.1% 



1 strain from Kansas 84.8 % 



3 strains from Nebraska 76.4 % 



3 strains from Montana . 65.4% 



1 strain Grimm alfalfa, from Fargo, North Dakota ; 2.8% 



1 strain Grimm alfalfa, from Clearwater, Minnesota . 7.0% 



1 strain Turkestan alfalfa, from Highmore, S. D. . 9.2% 



While the mortality may not have been due to cold 

 alone, the data clearly indicate great differences in cold 

 resistance, as a rule correlated with the severity of the 

 winter climate of the region whence the seed was secured. 



Several of the same strains reported on had been sown 

 broadcast in neighboring plots in the spring of 1907, 

 and were exposed to the same conditions in the winter 



