INORGANIC CONSTITUENTS. 



13 



The weight of the entire plant gradually decreased from the begin- 

 ning, until after 12 days a loss of approximately 40 per cent was 

 recorded. 



SEEDLINGS GROWN IN NUTRIENT SOLUTIONS. 



EFFECT OF SOLUTION CONTAINING ONE FERTILIZING ELEMENT ON 

 ABSORPTION OF PLANT FOOD. 



Table 2 shows the effect of growing seedlings in solutions contain- 

 ing only one fertilizing element on the absorption of that constituent 

 by the plant, and likewise on the absorption of the other constituents 

 dissolved from the seeds, as compared with the absorption of these 

 same elements by plants grown in water cultures. The solutions 

 used contained, respectively, 100 and 150 parts per million of nitrate 

 in the form of sodium nitrate, 64 and 150 parts per million of phos- 

 phoric acid in the form of sodium phosphate, and 50 and 150 parts 

 per million of potash in the form of potassium chlorid. 



TABLE 2. Amounts of nitrogen, phosphoric acid, and potash in the axes (plumule +radi- 

 cle) at the end of 9 days, when grown in different nutrient solutions. l 



See page 30, appendix, for detailed data on which this table is based. Figures for 12 days. 



