334 



Missouri Agricultural Report. 



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T^«>»i»8iJ3 



Greninger, Carthage; 10 ears white corn, cen- 

 tral zone, second, J. G. Douglass, Shelbina; 

 10 ears yellow corn, central zone, third, J. 

 G. Douglass, Shelbina. 



The central zone comprises the states 

 of Ohio, Indiana, Kentucky, Illinois, Iowa, 

 Missouri, Kansas and Nebraska. Thirty- 

 seven states and the Dominion of Canada 

 were represented with competitive exhibits 

 in the "open-to-the-world" classes. 



In addition to the competitive grain 

 from Missouri, the College of Agriculture 

 sent an interesting display featuring the 

 arrangement and display of Experiment Sta- 

 tion material at county fairs. 



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'*4.i^V^t 



SOME FACTORS INFLUENCING THE 

 YIELD OF CORN. 



(C. B. Hutchison, professor of farm crops, University of Missouri.) 



The average yield of corn in the United 

 States during the five-year period of 1906- 

 First prize single ear 1910 was 28.5 bushcls per acrc. At the same 



shown by boy. Shown ,. ., •ij-tv/t- 



by Oscar Douglass, shei- time the average yield in Missouri was a 

 bina. Mo., in annual Mis- y^^^i^ iggg than 30 bushcls per acrc. During 



souri State Corn Show, ^ ^ 



1914. Winner of RuraUst the scasou of 1913 onc member of the Mis- 

 ^^°^^^* souri Corn Growers' Association grew 114 



bushels of air-dried corn on an acre of ground, and five boys in the 

 boys' corn growing contest of the association averaged more than 

 92 bushels per acre, in spite of one of the most severe drouths the 

 State has ever experienced. Every year yields of considerably 

 more than 100 bushels are reported over the main corn belt, 

 while in the south yields of more than 200 bushels have fre- 

 quently been recorded. It would seem, then, that the corn 

 plant as it exists today is able to yield much more than we 

 ordinarily obtain from it, and that much larger yields may be 

 expected if conditions are made favorable for its growth and 

 development. A brief consideration of some of the factors which 

 are responsible for these low yields is the purpose of this dis- 

 cussion. 



The Important Factors. — Those factors which influence the 

 yield of corn and which are to a greater or less degree under the 



