153 



seed is imported from such countries as Germany, France, Chili and America, 

 all of which countries occupy a more southern position than that of Sweden. 

 As a result of this difference in latitude, sorts produced from seed obtained 

 from the countries indicated are invariably less hardy than the Swedish 

 sorts which have become acclimatized and are now quite as hardy as are the 

 wild strains. 



During the years 1907-1910 careful comparative trials were conducted rj 

 at Svalof with a large number of Swedish and foreign clover sorts. These 

 trials showed that the Red Clover from the province of Silesia, Germany 

 gave, after the favorable winter of 1907-8, almost as high a total yield as 

 did the best Swedish clover. The winter of 1908-09, however, was more 

 severe with the result that the Silesian clover yielded from 15 to 20% less 

 than the Swedish, while the English and Chilian were completely killed out. 

 Tons per acre. 



2 



Swedish. "German." English and Chilian. 



FIG. XLVI. Comparison of Swedish and foreign Red Clover Sorts. The lower vertical 

 lines indicate the first cutting of 1908, the horizontal lines the second cutting of 1908 and 

 (lie upper vertical lines the crop of 1909. [WITTE, H. Sveriges Utsadesforenings Tidskrift 

 910, p. 321. 



