41 



The above data clearly indicate that while rather marked differences 

 can often be detected in oats in respect of their tendency to stool, yet it is 

 quite unsafe to accept ' stooling propensity ' as a basis of sort valuation. 



In 1904 Vestergaard (80 p. 107) studied 67 different strains of barley 

 representing in all about 20,000 plants, each of which was grown on from 

 two to three different plots. This material was divided into four different 

 classes according to yield and the following data obtained: 



