16 



CORN 



RELATION OF THICKNESS OF STAND TO PER CENT OF BARREN STALKS 



It has been found that the thickness of planting affects the per 



cent of barren stalks. In a five year's test in Iowa, the results have 



been as follows : 



TABLE NO. 36 



**SHOWING PER CENT OF BARREN STALKS AS AFFECTED BY THICKNESS 



OF PLANTING. 



(This table shows the number of barren stalks per 100 plants) 



As the rate of seeding increases the per cent of barren stalks rises. 

 This has been found to be particularly true in dry years. 



The effect of barren stalks on yield is well shown in the following 

 table .giving the results of an experiment conducted in Ohio* in 1906. 



SINGLE ROW COMBINED LISTER AND DRILL. 

 Used in very dry soils in order to get the corn deep into the 

 ground so as to obtain moisture. 



TABLE NO. 37 

 SHOWING RELATION OF BARREN STALKS TO YIELD 



From the above table it is seen that as the per cent of barren stalks 

 increase the average yield of corn decreases. It should be stated how- 

 ever, that planting too thick on a thin soil, or in a dry season, tends 

 to increase the per cent of barren stalks. 



'Ohio Bulletin No. 140. 

 **County Demonstration Sl.itinn Repoi-fy, Town 



