FALL-SOWN OATS IN THE SOUTH | 29 
the Coastal Plain the increase was from 50 to 60 per cent. Muriate of 
potash gave a slight increase in yield when applied to the sandy soils 
of the Coastal Plain. When potash was not applied the straw grown 
on these soils was weak and yields were reduced. On such soils the 
use of muriate of potash seems desirable. The data show that the 
application of muriate of potash does not pay on Piedmont soils. 
Bundles of grain from unfertilized and fertilized plots of fail-sown 
oats are shown in Figure 9. 
TIME OF APPLYING NITROGENOUS FERTILIZERS 
Experiments were conducted to determine the proper time of 
applying fertilizers to fall-sown oats. Acid phosphate was applied at 
seeding at the rate of 400 pounds per acre. In the spring nitrate 
of soda at the rate of 100 pounds per acre or*ammonium sulphate at 
the rate of 80 pounds per acre was applied as a top-dressing. The 
spring applications were made on different dates to determine the 
most effective time of application. These experiments, conducted at 
_Athens, Ashburn, Tifton, and Quitman, covered periods varying from 
two to five years. The data are given in Table 18. 
TaBLE 18.—Comparison of yields of winter oats at four localities in Georgia from 
the application of fertilizers at different dates during two or more years in the 
period from 1915 to 1917 and 1921 to 1925, inclusiwe 
[On the date stated application of a nitrate as a top-dressing was made in the form of either nitrate of soda 
(100 pounds per acre) or ammonium sulphate (80 pounds per acre) | 
Acre yields (bushels) 
Average 
Locality and application 
1915)1916/1917)1921|1922)1923/1924)1925 
Over no nitrate 
over first date of 
applying 
| 1921 to 1925 
| 
Increase or decrease 
Increase or decrease 
Increase or decrease 
over no nitrate 
Increase. or decrease 
over first date of 
applying 
1915 and 1916 
| 1922 to 1925 
| 1915 to 1917 
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