UNITED STATES DEPARTMENT OF AGRICULTURE 
BULLETIN No.1014 
Contribution from the Bureau of Plant latter 
WM. A. TAYLOR, Chief 
Washington, D. C. Vi January 11, 1922 
ARE ‘a ‘| 
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EFFECT OF DATE OF SEEDING ON GERMINATION, 
GROWTH, AND DEVELOPMENT OF CORN. 
By E. B. Brown, Agronomist, and H. S. GARRISON, Scientific Assistant, Corn Investi- 
gations, Office of Cereal Investigations. 
CONTENTS. 
Page. Page. 
Commonly observed effects of date of seeding. 1 | Results obtained—Continued. 
Siateexperiments=-osnos- Saas Ss. Soe. 1 Effects on height and rate of growth..... 8 
Experiments at the Arlington Experimental Effects on development..............-.-- 9 
TRA ars oe a5 re Ses ma ek Sos arin mam Aan aa 3 Correlation of effects.................---- 9 
Restritstob bain edeeee tm ee ie se oe Si CS uM ary a eee core eo ay teen eres 11 
Effects on germination...-..........-.--- 8 
COMMONLY OBSERVED EFFECTS OF DATE OF SEEDING. 
Corn growers in localities with a long season have observed that 
early and late seedings of the same variety of corn usually show wide 
differences in rate of growth, total growth, and number of days 
required to reach maturity. In general, corn which is seeded early 
requires a longer time to come up than that which is seeded later. 
The plants also grow more slowly, bear their ears lower, and do not 
attain so great a height. The number of ears to the plant, the size 
of the ears, and the number of suckers have not been found to be 
affected consistently by the time of seeding. 
STATE EXPERIMENTS. 
Numerous experiments on seeding at different dates have been 
conducted by the State agricultural experiment stations. The 
primary purpose of most of these experiments has been to determine 
the relative value of the different dates of seeding in influencing the 
crop yields. In the published results of some of the experiments 
the only data presented have been comparisons of yields from the 
different seedings. In others, additional data have been presented 
upon the height of stalks and the number of days from seeding to 
maturity. 
68201°—21—Bull. 1014 —1 
