96 



Development and Activities of Roots of Crop Plants. 



again thinned and containers 1, 2, 3, and 4 were removed from the trench and 

 examined, while soil samples were obtained, by the use of a geotome, from 

 containers 5, 9, 10, and 11. After securing the samples the holes left by the 

 soil-tube were carefully refilled with moist soil, which was tamped into place. 



Table 30. — Water-content of soil on May 19 and June 15. 



The water-content at the various levels, together with the loss during the 

 period, may be seen in table 30. These data, with a statement of root dis- 

 tribution, are summarized in table 31, while the actual root distribution is 

 shown diagrammatically in figure 40. 



An examination of table 30, and especially table 31, shows that the water- 

 content in the several containers with plants had been reduced from 4 to 10 



