1917 TO 1923 21 
seedings each year is 2.9 bushels per acre, with a total average yield 
of 30.6 bushels for the 4-peck rate. 
These variations in yield have not been fully consistent, however, 
either from year to year or between seedings at different dates for the 
same year. The average of the October 1 seeding for the 6-year 
period shows a difference of 1.3 bushels per acre in favor of the 6-peck 
rate over the 4-peck rate, whereas with the October 15 seeding there 
is a difference pf 0.1 of a bushel in favor of the 4-peck rate. Between 
the 3-peck and the 4-peck rates the average difference for the seven 
seedings each year was 1.2 bushels per acre in favor of the 4-peck 
rate. The variation was fairly consistent throughout the test. 
This trial was conducted on fallow throughout the entire period of 
the experiment, but the theory that the results might be reversed with 
less favorable tillage methods does not find much support. The 
results in years of light rainfall showed practically the same type of 
variation between the 3, 4, and 6 peck rates of seeding as was shown 
in the years with better moisture conditions. 
With the thicker seedings, above the 4-peck rate, the stand usually 
was considerably thicker, the straw yield heavier, and sometimes the 
quality of the grain poorer. Consequently, it appears that the 4-peck 
rate of seeding has given the most profitable yields. 
SPRING WHEAT, OATS, AND BARLEY 
Rate-of-seeding tests with spring grains were conducted with only 
a single date of seeding. Results with these crops for each year and 
the averages for the periods in which the experiments were conducted 
are shown in Table 17. These crops were grown on corn ground 
except in 1923, when they were on fallow. Consequently, the yields 
of these crops have averaged considerably smaller than those of 
mnter wheat in proportion to the average yields secured in rotations. 
The 4-peck rate averaged highest with wheat. Both lighter and 
heavier seedings yielded slightly more in some years, and the 2-peck 
rate averaged within 0.6 bushel of the 4-peck rate. The 4-peck 
seeding produced sufficiently higher yields to warrant seeding at the 
heavier rate in only two years, 1918 and 1920, and in other years 
there was but little difference. With oats and barley for the time 
the tests were run, seeding at 4 pecks per acre seemed to show the 
most profitable yields. 
DATE-OF-SEEDING TESTS 
Date-of-seeding trials ^^'ith winter wheat, spring wheat, oats, and 
barley were conducted the same as those to determine the best 
rates of seeding. Results T\ith these trials, however, are more con- 
clusive. The yields for the different dates for each year and for the 
period the experiments were conducted with each crop are shown in 
Table 18. 
The October 1 seeding of winter wheat yielded highest in three of 
the six years. The 6-year average yield was 35.7 bushels per acre, 
as compared with 34.2 bushels for the seeding of September 15. 
Yields from seedings either earlier or later than these dates averaged 
more than 2 bushels less, and seeding either earlier than August 15 
or later than October 15 caused a sharp decline in yield. The latest 
seeding yielded best in only one year, 1922. Consequently, seeding 
