1916] PRITCHARD—SUGAR-BEET BREEDING 427 
While only a few of the beet breeders’ problems have been 
outlined, they are fundamentally important and need investiga- 
tion for the purpose of developing more economical methods. 
Character of material employed 
The material employed consisted of (1) an American variety 
of sugar-beets, known as Morrison’s Kleinwanzleben; (2) an 
unnamed variety originated at Madison, Wisconsin, in 1912 by 
making selections from 11 foreign varieties and designated for 
convenience in reference as Madison Original Selections; (3) 5 
South Dakota varieties bred for several years at Brookings, South 
Dakota; and (4) an old, well-established European variety, Klein- 
wanzleben’s Original. 
Morrison’s Kleinwanzleben is composed of a large number of 
separate strains or families which have been preserved and im- 
Proved by continuous selection. Ten years were devoted to this 
work at Fairfield, Washington, and 3 years at Madison, Wisconsin. 
The records obtained from these families and their individual 
components have furnished all the progeny row data not otherwise 
accounted for in the tables and figures. 
Madison Original Selections are composed of beet families 
which originated from roots containing 18-26 per cent sugar. 
As no records of their performance were available until 1914, they 
have contributed few data to this paper. 
The 5 South Dakota varieties used in our experiments at 
Brookings were originated by selecting rich roots from foreign 
Stock and making subsequent tests and selections primarily upon 
the basis of a high percentage of sugar. About an equal number of 
roots were taken at random from each of these varieties to compile 
the data from this material, which are used in table I and graph 
A of fig. 51. 
Kleinwanzleben’s Original was the variety planted in the check 
tows. It is one of the most uniform, most highly bred, and most 
widely used varieties of sugar-beets on the market. The seed was 
taken from an unopened bag, sealed by the Rabethge & Giesecke 
Company at their plant, in order to increase ‘the probability of 
