322 



Journal of Agricultural Research 



Vol. VI, No. 9 



were isolated for this study were obtained from mature plants which were 

 grown primarily for transpiration studies in the large metal cans pre- 

 viously described. The plants made a vigorous growth and compared 

 very favorably in every way with the plants that were grown under 

 field conditions. 



Three corn plants were grown in each can during both seasons. In 

 1 91 4 the corn reached a height of 5 feet, and in 191 5 it stood 6 feet high, 

 but no grain was produced in either season. In 1914 six Dwarf milo 

 plants were grown in each can, but in 191 5 the number of plants was 

 reduced to three to each can. Six Blackhull kafir plants were grovm to 

 each can in 191 4 and three plants to each can in 191 5. 



The Dwarf milo reached a height of 3 feet in 1914, while in 1915 it 

 stood 4>^ feet high. The Blackhull kafir plants attained a height of 5 

 feet in 1914, but in 1915 they reached a height of 6 feet. Dwarf Black- 

 hull kafir was planted during the season of 191 5 only, and three plants 

 . were grov/n in each can. These plants reached a height of 4>^ feet. The 

 results for the two seasons are shown in Table VI. 



Table VI.' — Relative -weight of the roots and aerial portions of corn, kafir, and milo in 

 IQI4 and igij at Garden City, Kan';. 



1914 



