38 



reacoaably be expeeted to very ssriousiy modify r^isuitB. 



Wa3-r«nton (Physical Propertiss of Soils, iOl), quot©» 

 ©xperimentB on capillarity made by King (Wisconsin Station) 

 when the water ws» m&intained at different depths beneath 

 the surface. The results follow in Table XVI. 



Table XVI t Rate of Capillarity, where '"ater was 



Maintained at Different 'Depthe from the Surface. 

 Pounds per Square-foot Surface. 

 Soil rii stance Wat-r^r Level beneath Surface 

 1 ft. 2 ft. 3 ft. 4 ft, 



» 



Fine Sand 2.37 lbs, 8.07 1.23 .91 

 Clay Loam 2.05 1.62 1.00 .90 



The evaporation or amount transferred to the surface by 

 capillarity was sufficient where the water was four feet 

 beneath the surface "for the most luxuriant growth." 



These results, however, are not eecured in the field 

 since crops suffered with the water table within five feet 

 of the surfaee. The roots would easily penetrate to 

 within four feet of the water table. Warrenton assigns as 

 a reason for this that in the laboratory the soils are 

 usually screened so thstt the particles are of a fairly 

 uniforai size, while in the field there is a greater varia- 

 tion J and that the water level in the field does not tf^^Jl^y 



