90 
Journal of Agricultural Research 
Vol. XXVIII, No. 1 
yields included in the plan of experiment had to be abandoned. One hundred 
untreated and 100 treated machine-threshed kernels of each of the varieties, 
Fulcaster (C. I. 6162) and Purplestraw (C. I. 1915), grown on Arlington 
Experiment Farm, in 1921, were used. The treatment was applied on October 
14,1921, and the seed allowed to dry five days at room temperature. On October 
19 the untreated and treated kernels of each variety were sown in the field in 
adjacent sets of 100 seeds, and each set consisted of three successive rows con¬ 
taining 33, 33, and 34 kernels, respectively^ The kernels were spaced 7 inches 
apart in rows 1 foot apart. 8 One month after sowing, the seedlings were counted. 
In July, 1922, the number of plants which had matured and the average number 
of culms per plant were determined. The results are presented in Table XII. 
Table XII.— Effects of the modified hot-water treatment on the development of 
wheat plants from machine-threshed seed 
Variety 
Seed untreated 
Seed treated 
Field 
germina¬ 
tion 
Plants 
over¬ 
wintered 
and 
matured 
Average 
number 
of culms 
per 
plant 
Field 
germina¬ 
tion 
Plants 
over¬ 
wintered 
and 
matured 
Average 
number 
of culms 
per 
plant 
Fulcaster... 
Per cent 
90.0 
79.0 
Per cent 
90.0 
79.0 
12.0 
19.3 
Per cent 
71.0 
76.0 
Per cent 
71.0 
76.0 
11.6 
19.1 
Purplestraw.. 
Average. 
84.5 
84.5 
15.7 
73.5 
73.5 
15.4 
Table XII shows (1) that the field germination was somewhat less and that 
the number of culms per plant was slightly less from treated than from untreated 
wheat and (2) that plants from untreated and treated seed overwintered without 
reduction in numbers. The fact that the number of culms produced per plant 
was less from treated seed than from untreated seed suggests the possibility that 
the injurious effects of treatment on spaced plants may extend throughout their 
life, if we assume that the culms from treated seed did not produce heads of 
greater weight. Repetition of the experiment on a larger scale would be desirable, 
however, before drawing definite conclusions. 
EFFECTS OF THE MODIFIED HOT-WATER TREATMENT ON 
YIELD 
Experiments to determine the effects of the modified hot-water treatment on 
yield have been conducted for three years. On October 19, 1920, definite quanti¬ 
ties of each of two lots of Goens (Red Chaff) wheat from different sources in Indiana 
were weighed and measured, treated, spread out in thin layers and left to dry for 
one week. At the end of this period the treated seed had regained its original 
weight and volume. On October 26, the untreated and treated seed of both lots 
was sown in fortieth-acre plats on Arlington Experiment Farm, Va., at the rate 
of 6 pecks per acre. The results are presented in Table XIII. 
8 Unpublished data by Dr. C. E. Leighty seem to indicate that at this distance the effect of competition 
by wheat plants is nil. 
