THE EARLY DEVELOPMENT OF THE OAT PLANT 223 



Make drawings of the plants at the different stages of 

 growth and from the different depths of planting. Show in 

 drawings the three temporary roots that develop first, and 

 in other drawings the permanent roots that develop some- 

 what later and are sent out in whorls from the nodes. Show 

 how the distance between the temporary roots and the whorl 

 of permanent roots depends upon the depth of planting. 

 Show how the older plants begin to tiller by sending out new 

 stems. 



Group the drawings so that they will appear well on the 

 page. The drawings should include the root system, stems, 

 and leaves and their arrangement. 



