286 



K. KREEB 

 Table 4 



Diminution of yield, in percent, of control plants at various species by increased salt 



content 



* After Hayward and Wadleigh (1949) 



ing effect overcomes the salt effect. Above 0-5% salt in the soil however, 

 more fertiliser can no longer balance the salt effect, and the yield curve 

 declines. If the same experiment were carried out with non- salt-tolerant 

 crops (for instance potatoes) a typical e-function-shaped curve might be 

 obtained. 



REFERENCES 



Babuschkin, L.N. (1959) Diagnosen dcs Wasserbedarfs von Gemiisepflanzen auf 

 Grund der Saftkonzcntration. Fizlol. Rastctiij 6, 480-483, Russian. 



