GROWING THE CROP 



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FIG. 157. The upper photograph shows heads of six-row, four-row, and two-row barley. 

 The lower diagram in cross-section shows the position of spikelets in each type. Note that 

 in the four-row barley the lateral rows overlap, while in the two-row they are sterile. (Pro- 

 ductive Farm Crops.) 



