PLATE XLI 



Fig. I. — Root systems of two Blackhull kafir plants at the time they had reached 

 a height of 6 feet and were blooming. Seed planted on May 26, 19 15. Root sys- 

 tems isolated on September 3, 1915. Greatest depth of root penetration, 6 feet. 

 Greatest lateral extent of the roots, 3 feet 8 inches. 



Fig. 2. — Root system of two Dwarf milo plants at the time the seed was in the milk 

 Stage. The plants stood 3 feet 6 inches high. Seed planted on May 26, 1915. Root 

 systems isolated on September 3, 1915. Greatest vertical penetration of the roots, 

 6 feet. Greatest lateral extent of the roots, 3 feet 8 inches. 



