Table 41. Vegetable Crop Yield Reductions as Influenced by Soil Salinity.

Crop Maximum Soil Salinity Without Yield Loss -Threshold (dD/m)1/ Decrease in Yield at Soil Salinities above the Threshold (% per dD/m)
Sensitive:    

     Bean

1.0

19

     Carrot

1.0

14

     Onion

1.2

16
Moderately sensitive:    

     Turnip

0.9

9

     Radish

1.2

13

     Lettuce

1.3

13

     Pepper

1.5

14

     Sweet potato

1.5

11

     Broad bean

1.6

10

     Corn

1.7

12

     Potato

1.7

12

     Cabbage

1.8

10

     Celery

1.8

6

     Spinach

2.0

8

     Cucumber

2.5

13

     Tomato

2.5

10

     Broccoli

2.8

9

     Squash, scallop

3.2

16
Moderately tolerant:    

     Beet

4.0

9

     Squash, zucchini

4.7

9

1/1 decisiemens per meter (dS/m) = 1 mmho/cm
                                                           = approximately 640 mg/liter salt
Source: California Agriculture. 1984(October).


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