160 



THIRD ANNUAL SESSIONS 



SOIL MOISTURE DETERMINATIONS, EDGELEY, NORTH DAKOTA. 



WH£/iT MO/STURE CON^SERMT/Of^ PLOTS 



• SPRING PLOWEO 

 FALL PLOWED 

 F4LL0W 1907 



.FALLOW 1906 



LBS. STRAW 



A SPHIN6 PLOWEO 

 B FALL 



C FALLOW 1907 



D FALL 1908 



/9oa 



16 30 6 /3 27 2» 



l8/t20l7 3/0n 3/ /7 21 



Fig. 5. 





SQILMOISTURE DETERMINATIONS, NORTH PLATTE, NEBRASKA. 



WHEAT MOISTURE CONSERI//ITI0/V PLOTS. 









A — 

 Bo- 

 C ■- 

 D>- 



/S07 



SPRING PLOWEO 24.5 BU.2040 LBS. STRAW 



—0 FALL 26.0 . 2540 .. 



FALLOW 1907 



— ■ FALLOW 1906 31.6 . 3330 



/908 



A SPRIN6 PLOWED 22.7 BU. 1920 LBS. STRAW 

 B FALL .. 27.3 23a0 .. 

 C FALLOW 1907 40.5 .. 4370 » 

 D FALLOW 1908 









Z2 







21 

 20 





1 







\ 





la 











IB 



1 



16 











16 

 It 



i 

 ■k 





12 

 10 











IS 

 10 













\ 





6 





7^ 







a 



6 





6 





















t 



\ 





e 













y 23 6 



11 6 



S 2¥ 1 



4 IS20 29 T 13 litis l9Zt 7 21 S ISZI II 3 







APR. MA 



' c/Uf/£ 



AU6. OCT. 



APR. MAY iJUfJE (JULY MU6. SfPT OCT. 





Fig. 6. 



spring or fall plowed plots. On the first of July, however, all of these 

 plots had reached practically the same moisture content, and this was 

 maintained for the rest of the season. The months of July and August 

 were very dry. 



Summer Fallow. 



"All of the yields were low, but the beneficial effect of the fallow is 

 seen in the greater yield of that plot. The difference in yield is, ho\v- 

 ever, sufficient to justify fallowing in preference to fall plowing. The 



