116 



EXPERIMENTAL FARMS 



5 GEORGE v., A. 1915 



ereuce to previous reports on this subject will show that mangels of the following 

 Mammoth Long Red Half Sugar and Giant Yellow Intermediate have been placed at 

 or near the head of the list and are therefrom to be considered as superior in feeding 

 value, and are in consequence, from this point of view, the most desirable to grow. 



The character of the season, as well as the richness of the soil, influences the com- 

 position and size of root and it will, therefore, be of interest to compare the' averages 

 from the results of the past eight years. 



Mangels. — Yield and Average Composition, 1904-1913. 



Yt^fir. 



1904. 



1905. 



1906. 



1907. 



1908. 



1909. 



1910 



1911 



1912. 



Average for 9 years. 



Number 



of 

 Varieties 

 Analysed. 



10 

 17 

 16 

 10 

 12 

 14 

 8 

 23 

 13 



Average 



Weight 



of 



One Root. 



Lb. 



2 

 3 

 2 

 2 



2 

 3 

 5 

 2 

 2 



Oz. 



11 



9 



7 

 11 



2 



5 

 10 



9 

 14 



Yield 

 per Acre. 



Tons Lb. 



30 1,277 

 39 369 



31 



27 

 23 

 28 

 56 

 29 



159 

 680 

 6'.i0 

 920 

 57 

 61 



Sugar. 



p. c. 



6 

 4 

 5 

 7 

 5 

 6 

 4 

 6 

 5 



62 

 ■67 

 •93 



46 



33 

 •21 

 •46 



43 

 •63 



588 



Influence of Heredity in Mangels. 



It will be evident from what has been said respecting the differences in dry matter 

 and sugar of the several varieties of mangels that heredity may be a factor of some 

 importance in influencing the composition of roots. Tc obtain more direct evidence 

 on this point we have, for the past fourteen years, grown side by side and analysed the 

 Gate Post and Giant Yellow Globe, varieties representing two distinct types of mangels. 

 The roots were grown, as far as was practicable, under identically the same conditions 

 and consequently any differences in composition exhibited by them might be attributed 

 to transmitted qualities. 



The fact that the Gate Post varietj^ has each season for fourteen years without 

 a single exception proved the richer both in dry matter and sugar, affords fairly good 

 evidence that the composition of mangels is influenced by the factor of heredity 

 and, as has been remarked in previous reports, indicates that improvement, as 

 regards nutritive value, might be brought about bj' well-directed breeding experi- 

 ments. 



