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. 



Container. 



Depth of sample. 



- 



T\/T ntr 1Q 



iviay ±y. 



June lo. 



OSS. 





feet. 



p. ct. 



p. ct. 



p. ct. 





U to U./ 



oU . o 



oo ^ 



ft Q 



O . O 





V. i tO l.O 



Oft ft 

 ZO . O 



OA K 

 zo . o 



Q 

 4 . o 





1.3 to 2 



26.9 



25.2 



1.7 



JNo. 3 



u to u.o 



97 7 

 Z< . i 



o^ 



4 2 





u.o to 1 



Oft Q 



Oft 1 



2.2 





1 to 1.0 



07 Q 

 Z i . y 



07 1 







l.o to ^ 



op; q 

 ZO . V 



Oft 1 

 ZO . 1 



TU . z 



"NT— C 



utou./ 



OQ Q 



zy . o 



1R ft 







0.7 to 1.3 



31.5 



26.5 



5.0 





1.3 to 2 



31.2 



28.0 



3.2 



TVTy. n 



u to U.O 



oU . 'k 



04. ft 

 zt . o 



K ft 

 o . o 





0.5 to 1 



28.6 



24.9 



3.7 





1 to 1.5 



28.5 



25.9 



2.6 





1 K +n O 



l.O to z 



OQ ft 



zy . o 



07 ft 



£ 1 . O 



o n 





z to Z.O 



OQ ft 



zy . o 



oq n 

 ^y . u 



n s 



w . o 





Z.o to O 



Oft 4 

 Zo . *t 



OQ 



zy . o 



1 h Q 



t^u . » 





3 to 3.5 



27.2 



27.8 



+0.6 



JNO. 11 ... . 



u to u.o 



QO F. 

 oZ . O 



04. 4 

 z^t . t 



s i 



O . 1 





u.o to 1 



Q1 ft 

 di . O 



03 7 



ft 1 





1 to l.O 



Qrt J. 

 OU . "1 



03 n 



Zo . U 



7 4 





l.o to Z 



3Q ft 

 oU . O 



Oft ft 

 Zo . o 



o n 

 z . u 





z to Z.O 



07 7 

 Z/ . / 



Oft Q 

 Zo . O 



i n ft 





Z.O tO O 



07 7 

 Z/ . / 



07 3 

 Z / . O 



n 4 



U . ^: 





3 to 3.5 



27.6 



27.3 



0.3 



No. 2 



to 0.7 



29.5 



31.1 



+ 1.6 





0.7 to 1.3 



29.6 



30.6 



+ 1.0 





1.3 to 2 



31.9 



32.4 



+0.5 



No. 4 



to 0.5 



27.1 



28.2 



+ 1.1 





0.5 to 1.0 



28.0 



28.6 



+0.6 





1.0 to 1.5 



28.6 



28.3 



0.3 





1.5 to 2 



28.6 



29.0 



+0.4 



No. 10 



to 0.5 



27.2 



27.8 



+0.6 





0.5 to 1 



27.0 



27.6 



+0.6 





1 to 1.5 



28.3 



28.0 



0.3 





1.5 to 2 



28.1 



27.8 



0.3 





2 to 2.5 



27.4 



27.8 



+0.4 





2.5 to 3 



30.5 



30.3 



0.2 





3 to 3.5 



30.2 



30.1 



0.1 



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 



