HYDRATURE AND PLANT PRODUCTION 



i70 



Fig. 4. Yearly curves of hydrature (osmotic values) of barley (Trabot) with different 

 water supply: Curve 81 = 288 mm; 82=127-7 nim; 83=84-2 mm; 84=76-5 mm. 

 After Kreeb, 1957. 



A 6 8 



Osmotic value in atm 



10 



12 



Fig. 5. Correlation between the osmotic value and refractometer value (percent 

 dissolved material) of alfalfa sap, diluted with water. 



19 



