ee CEREALS AT THE AKRON FIELD STATION 91 
Previous to 1920 all grain from nursery rows was threshed \by 
flailing; but a nursery thresher was made that year, which has since 
been used. 
EXPERIMENTS WITH WHEAT 
The experiments with wheat at Akron included both winter and 
spring varieties in plats and nursery rows. Varietal, rate-of-seeding, 
and date-of-seeding experiments have been conducted, and consid- 
erable attention has been given to the production of improved varie- 
ties by selection. It had been shown that winter wheat is the crop 
of prime importance in that part of the Great Plains in which Akron 
is located. Consequently, the experiments with winter wheat have 
been much more extensive than those with any other cereal and in 
most seasons have equaled in number and extent those with all other 
cereals combined. ‘The experiments with spring wheat have ranked 
second inimportance. <A harvesting scene in a winter-wheat field in 
northeastern Colorado is shown in Figure 10. 
WINTER WHEAT 
The experiments with winter wheat have included comparisons of 
varieties and selections and of different rates and dates of seeding. 
Fic. 10.—Harvesting wheat with a header in northeastern Colorado 
The greater part of the nursery experiments has been with winter 
wheat. The results of field and nursery experiments show that only 
the hard red winter wheats of the Turkey or Crimean group are 
adapted. Most of the winter-wheat varieties included in the plat 
experiments are of this type. Many different types have been grown 
in the nursery, but the best results were obtained from varieties or 
strains of the Crimean group. Heads and kernels of the two most 
important varieties of wheat in northeastern Colorado, Turkey and 
Kanred, are shown in Figure 11. 
VARIETAL EXPERIMENTS 
The winter-wheat varietal experiments were begun in the fall 
of 1907. The 1909 crop was almost completely winterkilled, and 
no winter-wheat plats were sown in the fall of 1918. The varietal 
experiments to 1917 were grown chiefly on fallow. In 1917 and 
succeeding years the varieties were sown in quadruplicated plats, 
