86 o 
Journal of Agricultural Research 
Vol. XXTII, Na in 
Fig. xi. —Graphs showing soil and air temperatures for the season of 1920 and percentage of stand of spring r 
and winter wheat sown at different dates. A, Fall-sown Turkey wheat; B, spring-sown Marquis, 
wheat. The squares of the graph paper are filled in for the seedling period of each sowing, as, for in¬ 
stance, August 34 to 29. This represents the period during which the enviromental factors influenced 
the development of seedling-blight. To avoid confusion the curves for percentage of stand of plants 
are plotted on the date sown. The distance between the solid lines and broken lines showing stand ot 
control and inoculated plots represents the percentage of seeding-blight. 
