AREA B 



14 



12 



10 - 



SOIL DEPTHS 

 3-6 in. 



1/3 atm. 



15 atm. 



7/1 



± 



8/1 9/1 

 DATE 



POLYETHYLENE MULCH 



10/1 



16 - 



14 



12 - 



10 - 



8 - 



6 - 



4 - 



7/1 



8/1 



9/1 



DATE 

 WEEDED 



10/1 



Figure 8B. — Feriodia monthly soil moisture levels under two treatments. 



17 



