138 The Sugar-Beet in America 
me [7 nnn 7 ee 7 80 
46 - 7S 
V/4. 70 
14. +" _ 
3 : 
N 12 - 2 
$ = 
> > 
5 Q 
*% & 
cS 8 
$ f 6 
3 é 
es 7. es na ae 
g Linch |2% inches|5 inchesi& Inches 
SX | None - Coated be *, |Weetly 
s weedy] weekly | weedly | weekly 
Ss = : 
— (6) 26 Oz 64 96 Total 
B Percent Sucrose Percent Purity 
Fic. 16. — Effect of weekly irrigations on percentage of sucrose and 
purity. Utah. 
have given rather conflicting results. Observations by 
Schneidewind ! and others in Germany in the period from 
1896 to 1906 showed that, although the yields are smaller, 
root crops are richer in carbohydrates and protein in dry 
years than in wet ones; hence the net influence of weather 
is not so great as it is ordinarily thought to be. High- 
bred, resistant strains showed less variation in dry and 
wet years than did common varieties. 
1 Landw. Jahrb. 36 (1917), No. 4, pp. 474-581. 
