62 
Research Bulletin No. 3 
one with 9. The weight of dry matter in the three plants was 
4.3 grams. On May 17 the plants in both wilted, the one in VI 
suffering as much as the four in V. At no time after the thinning 
of April 27 did the plant in VI appear thriftier than the plants 
in V. None put forth a spike and all were nearly dead before 
June 12. The cylinders were opened on June 14. In VI the 
moisture conditions in both surface soil and subsoil were practi- 
cally indentical with those in XIX, while the subsoil was very 
slightly drier in V. Roots were very extensively and uniformly 
distributed thruout the soil mass. Figure 13 shows well the 
extent of the development of the roots in both. The weight of 
roots in the subsoil of both V and VI was three times as great 
as that of the roots in the subsoil of XIX. The plants in V and 
VI, having started with about the same amount of soil moisture 
and having formed a better developed root system, had made a 
much less economical use of the soil water, practically exhaust- 
ing it before putting forth spikes, than had those in XIX. 
KUBANKA WHEAT. 
A series of 6 cylinders, corresponding to those used for the 
Red Fife wheat, was planted on the same day with Kubanka 
wheat, ten seeds being used for each. On February 28, when the 
plants were from 4 to 9 inches high, they were thinned to the 
most vigorous four in each cylinder. No further thinning was 
intentionally practiced, but on March 26, mice ate off, almost 
level with the surface, one plant in VII and one in VIII. Both 
later put forth tillers. As with the Red Fife wheat, little differ- 
ence in growth was to be observed during the first month. 
Tables 13 and 14 give the data and figures 14 and 15 show the 
condition of the plants and the distribution of roots in the sub- 
soil. 
