314 



Journal of Agricultural Researcn 



Vol. VI, No. 9 



The evaporation during 5-day periods for the two growing seasons 

 is shown graphically in figure i . 



GENERAIv OUTLINE OF THE WORK 



The experiments herein reported were conducted with Pride of Saline 

 corn, Blackhull kafir, and Dwarf milo. The plants were grown both in 

 the field and in large galvanized-iron cans. The investigations with 

 the plants in the field included (i) the isolation of the root systems of 



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Fig. I. — Evaporation from a free water surface (tank) at Garden City, Kans., during the growing seasons 



of 1914 and 1913. 



corn, Blackhull kafir, and Dwarf milo at three stages of their growth; 

 (2) a study of these root systems in relation to their general extent, as 

 well as the number of their primary and secondary roots; (3) a com- 

 parative study of the leaf and sheath areas of these three plants at four 

 periods of their growth; (4) a study of the soil-moisture content and 

 the depth of root penetration. 



The plants grown in the large iron containers furnished the material 

 for a study of the relative dry weights of the roots and aerial portions 

 of corn, Blackhull kafir, and Dwarf milo. 



