33 



These two oirciuastanees art relatively connected. When the 

 soil eontains little water* the solution in the soil is com- 

 paratively eoncentratea in oharaoter. Fhen much rain haa 

 fallen, the supply of watwr in the soil siay b« ample, but 

 It eontains v®ry little plant Too4l, "The presence of 

 mueh soluble saline matter in the soil is probably a check 

 to a rapid transpiration of water by plants." 



