FIGURE IV-2. Salt tolerance of field crops* 







10 



ECe 



12 



IN MILLIMHOS PER CM. AT 25 C 

 14 16 18 20 22 



Barley .... 

 Sugarbeets 

 Cotton . . . 

 Safflower . 

 Wheat .... 

 Sorghum 

 Soybean . . 

 Sesbania . 



Rice (Paddy) 



Corn 



Broad bean , 



Flax 



Beans 



:^^ 





TZ 



m 











I l-f-'-l^ 



25% 

 10% 50% 



YIELD REDUCTION 



*The indicated salt tolerances apply to 

 the period of rapid plant growth and 

 maturation, from the late seedling stage 

 onward. Crops in each category are 

 ranked in order of decreasing salt tol- 

 erance. Width of the bar next to each 

 crop indicates the effect of increasing 

 salinity on yield. Crosslines are placed 

 at 10 , 25 , and 50-percent yield re- 

 ductions. 



only if that threshold were exceeded? Most studies 

 indicated that some damage began with any in- 

 crease and that there was no threshold where 

 damage first appeared or became markedly worse. 

 Recent data by Bernstein (14) give EC values 



causing 10, 25, and 50-percent yield decrements 

 for a variety of field and forage crops from late 

 seedling stage to maturity, assuming that sodium 

 or chloride toxicity is not a growth deterrent. 

 These values are shown in figures 1, 2, and 3. The 



FIGURE IV-3. Salt tolerance of forage crops* 







ECe IN MILLIMHOS PER CM AT 25 C 

 12 14 16 18 20 22 



Bermuda grass 



Tall wheatgrass ... 

 Crested wheatgrass 



Tall fescue 



Barley hay 



Perennial rye 



Hardinggrass 



Birdsfoot trefoil . . . 

 Beardless wildrye . . 



Alfalfa 



Orchardgrass 



Meadow foxtail .... 

 Clovers, alsike & red 



:m 



::^ 







foffi-w=w!«-f ;-^s> 



iMiifi 



The indicated salt tolerances apply to 

 the period of rapid plant growth and 

 maturation, from the late seedling stage 

 onward. Crops in each category are 

 ranked in order of decreasing salt tol- 

 erance. Width of the bar next to each 

 crop indicates the effect of increasing 

 salinity on yield. Crosslines are placed 

 at 10 , 25 , and 50-percent yield re- 

 ductions. 



YIELD REDUCTION 



462-246 O - 72 - 11 



149 



