EFFECT OF DATE OF SEEDING ON CORN. 3 
The Kansas Agricultural Experiment Station in 1895 and again in 
1896 made seven seedings of corn at intervals of one week from April 
18 to May 30. The early seedings were slower in coming up than the 
later seedings. There were no consistent differences in yield from 
the seedings of April 18 to May 9, the April seedings yielding highest 
in some instances and the May seedings in others. The seedings of 
May 1 and 2, however, gave the highest yields of good ears. Seedings 
made later than May 9 gave greatly reduced yields. 
~The Oklahoma Agricultural Experiment Station in 1898 made seed- 
ings at intervals of one week from March 28 to April 25 and a last 
seeding on May 13. The March 28 seeding gave the greatest yield. 
The seeding of May 13 outyielded that of April 25; otherwise, the 
general tendency was for the yields to decrease as the seeding date was 
delayed. The plants from later seedings matured in less time than 
those from the early seedings; a difference of four weeks in the dates 
of seeding caused only eight days difference in the dates of maturity. 
The Nevada Agricultural Experiment Station in 1894 made seven 
seedings of corn at intervals of 10 days from April 20 to June 20. The 
plants from the April 20 seeding required 142 days to mature; those 
of April 30 required 135 days and those of May 10 only 126 days. 
Data upon ripening were not recorded in connection with seedings 
made after May 10. The highest yield of ears was obtained from the 
April 20 seeding and the highest yield of stalks from the seeding of 
June 20. A difference of 10 days between the dates of seeding, April 
20 and April 30, caused only three days’ difference in the dates of ripen- 
ing. A difference of 20 days between the dates of seeding, April 20 
and May 10, caused but four days’ difference in the dates of ripening. 
‘Seedings of both dent and flint varieties were made by the South 
Dakota Agricultural Experiment Station at intervals of five days 
from May 1 to June 10 during 1888, 1889, and 1890. It is concluded 
from the experiments .“‘ that corn may be planted any time after May 
1 without danger of the seed rotting, but no gain is made in yield or 
maturity by planting before conditions of soil and atmosphere are 
right. These conditions usually come between May 10 arrd 20. Plant- 
ings made during the first half of May showed no difference in yield 
or maturity.” 
In general, the experiments reviewed indicate that the best yields 
of grain may be expected from the early seedings and the most rapid 
development and the greatest growth from the later seedings. 
Neither the extremely early nor the very late seedings are desirable. 
EXPERIMENTS AT THE ARLINGTON EXPERIMENTAL FARM. 
The investigations reported in this bulletin were begun at the Ar- 
lington Experimental Farm, Rosslyn, Va., near Washington, D. C., 
in 1915, and have been continued since that date. They have been 
