134 



Journal of Agricultural Research 



Vol. X, No. 3 



accounted for by assuming that the large application of water to the 

 already wet soil would more than satisfy the capillary demand of the soil, 

 and consequently the excess water would penetrate rapidly downward, 

 leaving the two surfaces equally moist. In all initial percentages and for 

 all irrigations the moisture content decreased with depth from the point 

 of application of the water. 



Average percenfa ge of rnoisfui'e m the soil for the 10 

 day^ aftsr the apphcaiion of different quantities of wafer 



15 inc hes of ivotBr &66 inches of wa1/;r_ .5inrhfs of h//i1ifr 



I 



^ 

 ^ 





I niftaL moisiure 2^% 



20 ' jS 



InitioL moisture 5 %> 



ImfiaL rnois'^ufe IC /^ 



In/ hoi moist i. 



/nii/aL moisture 20'^ 



Fig. i6. — Diagram showing the effect of the initial percentage of moisture en the downward distribution of 

 moisture in soils after the application of varying quantities of irrigation water. 



Effect on the Horizontal Distribution of Moisture 

 determined by weighing one end op a column op soil 



Ten brass tubes similar to those previously described were filled with 

 Greenville loam containing 24.36 per cent of moisture, the soil being com- 

 pacted by pressing layers of equal thickness into the tubes. Similar 



