122 



PRINCIPLES OF AGRICULTURAL CHEMISTRY 



influence upon the quantity of water transpired. Widstoe 1 found 

 that the transpiration of corn is from 552 per gram dry matter 

 on a loam, to 1616 on a sand or clay. 



Fig. 32. Pot experiments, on moisture used by plants. Utah Station. 

 Demoussy, at the Grignon Experiment Station, found that the 

 poorer the soil, the more water was transpired. The following 

 figures are quoted from him. 

 GRAMS OF WATER TRANSPIRED PER i GRAM DRY MATTER PRODUCED. 



1 Utah Bulletin, No. 105. 



2 Not manured the same as the rye grass. 



