188 



THE PRINCIPLES OF SOIL MANAGEMENT 



was not able to raise water to the height, even when 

 moist. 



Buckingham obtained the following results, which 

 show a very considerable vertical movement in fine 

 sandy loam soils to a height of nearly four feet. 



Table XXXIV 



It must be kept in mind, in examining these figures, 

 that the evaporation conditions in the different experi- 

 ments were not uniform, and therefore, that the results 

 are not strictly comparable. They do, however, show 

 the movement of a very large amount of water in this 

 way through distances of several feet. The amount 

 so moved in these sandy soils per year is several times 

 the total amount required to produce normal crops. 

 (See page 134.) There is also indication that in the short 

 period of a day the amount of water moved is sufficient 

 to meet the needs of a considerable mass of growing 

 plants. It is regrettable that no figures are available 

 for silt and clay soils, and to greater heights and hori- 

 zontal distances, in order that a more complete idea 

 of the availibility of water supplies at a distance of six, 



