QUESTIONS 57 



It is reasonable to expect that a corn that has been adapted to a 

 certain set of conditions will do better under those conditions than 

 some variety from a distance. This fact has been demonstrated 

 many times by farmers and experiment stations. For example : In 

 eastern Nebraska the rainfall is about 30 inches, while in the western 

 part of the state it is about eighteen inches, and the elevation is 

 about 2000 feet higher. An experiment was tried for two years in 

 western Nebraska. Farmers grew in the same field a number of 

 varieties mostly from eastern Nebraska in comparison with varie- 

 ties grown in western Nebraska, with the following results in yield 

 of bushels per acre 1 : 



Influence, of Adaptation 



Varieties mostly Native 



Year from eastern western Difference 



Nebraska varieties in yield 



1908 24.1 30.5 6.4 



1909 20.9 25.4 4.5 



Average 22.5 27.9 5.4 



The importance of using native-grown seed has been demon- 

 strated many times in other states. 



QUESTIONS 



1. What effect do cool nights have on maturing of corn? 



2. Do dent and flint corns differ in adaptation to climate? 



3. Describe a good corn soil. 



4. How long should the growing season be for good corn ? 



5. How much water is required to make a bushel of corn? 



6. How much rain is needed for a good crop? 



7. Explain the importance of adaptation or acclimated corn. 



1 Nebraska Agricultural Experiment Station Bulletin 126, 1912. 



