142 



THE SUGAR BEET. 



comparative weights of the roots at different periods of 

 their growth. From July until 5th of August, those 



Fig. 29. 

 Variation in weight of roots during the growth. 



----- line chemical fertilizers ; 

 line barnyard manure. 



with the chemicals are the largest, but from this time 

 until the harvesting pei'iod those with the ordinary 

 manure take the lead, during which time, as shown in 

 fig. 30, the saccharine qualities of the former are con- 

 stantly superior; as for the proportion of alkaline cin- 

 ders they are inferior. (See fig. 31.) We have here 

 every advantage in favor of the chemical compounds. 

 Cinders of the Beet. — As a general thing lightness in 

 weight of the cinders derived from the beet is desir- 

 able; these being composed mainly of the carbonates 



