n6 GRAIN BREEDING 



The same number of seeds from each of the different 

 heads are selected for planting each individual row. The 

 seeds are planted the same distance apart in the row and 

 the same space is left between the individual rows. 



Fig. 63. Crossing small grains. 



This system of planting admits of easy comparison of 

 individual plants of the same variety or of different varie- 

 ties by simply comparing the rows. 



The entire plot receives the same care and attention and 

 is finally harvested, each row separately. 



The rows are threshed and the yields from the individual 

 rows determined. A few of the high yielding rows of the 

 best quality are retained for increase plots, and the remain- 

 der cast out. The following year a comparative test for 

 yield and desirable characteristics is made between the 

 increase plots, and only those plots of grain that come up 

 to the desired standard are retained for a field test. 



The object of the breeder is to isolate single individual 

 plants that have in them the power of perpetuating their 



