REPORT OF THl? CHEMIST 177 



S^33iufMAL PAPER "No. 1b 



Mangels — Yield and Average Composition, 1904-1910. 



It will be seen that in dry matter and sugar the mangels of 1910 fall considerably 

 behind those of former years. In all probability this is to be attributed to the large 

 size of last season's roots, the average weight being 5 lbs. 10 ounces, as compared with 

 weights generally somewhat less than 3 lbs in previous years. The character of the 

 season has naturally a great influence on the size of the root and the latter, as is \* eil 

 known, is an important factor in determining composition — the larger the root, other 

 things being equal, the poorer its quality. The relation between weight of root and 

 yield per acre is a fairly constant one when comparing crops under the same cultural 

 treatment, a very large root will mean a heavy crop. In consequence we find a lower 

 feeding value, weight for weight, when the yield is extraordinarily large than when 

 the crop is a medium one. 



INFLUENCE OF HEREDITY IN MANGELS. 



For eleven seasons we have analysed the Gate Post and the Giant Yellow Globe, 

 varieties representing two distinct types of mangels. The roots submitted to analysis 

 have always been grown side by side so that as far as soil, seasonal and cultural condi- 

 tions were concerned, the environment has been practically identical for both varieties. 

 If characteristics of composition can be transmitted; if, in other words, heredity is a 

 factor influencing the percentage of dry matter and the sugar content, evidence thereof 

 should be forthcoming from the results of this investigation. The data are presented 

 in the following tabular scheme : — 



Dry Matter and Sugar in Gate Post and Giant Yellow Globe Mangels. 



16—12 



