16 BULLETIN 836, U. S. DEPARTMENT OF AGRICULTURE. 
VARIETAL EXPERIMENTS. 
The objects of the varietal experiments were to determine the 
adaptation and value of the different groups of broom corn and the 
best varieties In each group. 
The results obtained from all the lots and selections of all va- 
rieties included in these experiments in any or all of the five years 
from 1914 to 1918, inclusive, are presented in the tables that follow. 
All the agronomic data that are available, so far as they serve to 
show the comparative response of the different varieties to environ- 
ing conditions each season, are presented. - 
The data in the tables include not only the yields, therefore, but 
the row space occupied by each plant and each stalk; the length in 
days of the vegetative and fruiting periods and of the total grow- 
ing period; the percentage of suckers and of stalks héaded; and the 
height of the plants. The yield (in pounds) of good and poor brush 
and the total yield of brush per acre are shown. The average length 
of the brush of each quality and the percentage of good brush in the 
total yield are also given. 
The tabulated data show clearly that the Dwarf varieties of broom 
corn outyield the Standard varieties under such conditions as exist 
at Woodward, Okla. The Dwarf varieties evidently require less 
water and therefore are better adapted to the conditions obtaining 
in the district described than the Standard varieties. 
STANDARD BROOM CORN. 
The groups of broom corn have been described previously. Many 
varietal names are appled to each group; but these are not signifi- 
cant in most, if not all, cases, as they do not represent distinct va- 
rieties. Some of the names applied to Standard broom corn are: 
Australian, California Golden, Chinese Evergreen, Early Long- 
brush Evergreen, Evergreen, Imperial Evergreen, Improved Ever- 
green, Missouri Evergreen, and Tennessee Evergreen. In many 
cases these are local names. The grower should know that he has 
seed of high germination, selected from brush of good quality. The 
manufacturer is not particularly interested in the name applied to 
the brush. What he wants to know is the quality of the brush he 
is buying. This he can not determine by the name, but instead must 
see the brush itself. 
The results obtained with the Standard variety in the varietal ex- 
periment are shown in Tables V and VIII. From 1914 to 1916, in- 
clusive, one plat only of this variety was grown each year. The 
source of that variety (C. I. No. 556) is supposed to be Florence, 
Italy. The stock seed used in the experimental work was obtained 
by the senior writer in 1914 from Lindsay, Okla., the original seed 
having been imported two years previously. The field at Lindsay 
