Table 9: Classification of soil salinization, depending on the crop and its salinity threshold.
Crops without a threshold indicated are considered not being affected by salinity (adapted from Hanson et al., 2006)
Crop | Threshold Salinity (dS/m) | 75% of threshold | Low | Moderate | High |
Barley | 8 | 6 | <6 | 6 - 8 | >8 |
Bean, Common | 1 | 0.75 | <0.75 | 0.75-1 | >1 |
Broad bean | 1.6 | 1.2 | <1.2 | 1.2-1.6 | >1.6 |
Canola | 10.4 | 7.8 | <7.8 | 7.8-10.4 | >10.4 |
Corn | 1.7 | 1.275 | <1.275 | 1.275-1.7 | >1.7 |
Cotton | 7.7 | 5.775 | <5.775 | 5.775-7.7 | >7.7 |
Cowpea | 4.9 | 3.675 | <3.675 | 3.675-4.9 | >4.9 |
Crambe | 2 | 1.5 | <1.5 | 1.5-2 | >2 |
Flax | 1.7 | 1.275 | <1.275 | 1.275-1.7 | >1.7 |
Guar | 8.8 | 6.6 | <6.6 | 6.6-8.8 | >8.8 |
Kenaf | |||||
Millet, channel | |||||
Oat | |||||
Peanut | 3.2 | 2.4 | <2.4 | 2.4-3.2 | >3.2 |
Rice, paddy (field water)** | 1.9 | 1.425 | <1.425 | 1.425-1.9 | >1.9 |
Rye | 11.4 | 8.55 | <8.55 | 8.55-11.4 | >11.4 |
Safflower | |||||
Sesame | |||||
Sorghum | 6.8 | 5.1 | <5.1 | 5.1-6.8 | >6.8 |
Soybean | 5 | 3.75 | <3.75 | 3.75-5 | >5 |
Sugar beet | 7 | 5.25 | <5.25 | 5.25-7 | >7 |
Sugarcane | 1.7 | 1.275 | <1.275 | 1.275-1.7 | >1.7 |
Sunflower | 4.8 | 3.6 | <3.6 | 3.6-4.8 | >4.8 |
Triticale | 6.1 | 4.575 | <4.575 | 4.575-6.1 | >6.1 |
Wheat | 6 | 4.5 | <4.5 | 4.5-6 | >6 |
Wheat (semi-dwarf) | 8.6 | 6.45 | <6.45 | 6.45-8.6 | >8.6 |
Wheat, durum | 5.9 | 4.425 | <4.425 | 4.425-5.9 | >5.9 |
Alfalfa | 2 | 1.5 | <1.5 | 1.5-2 | >2 |
Alkali grass, nuttall | |||||
Alkali sacaton | |||||
Barley (forage) | |||||
Bentgrass | 6 | 4.5 | <4.5 | 4.5-6 | >6 |
Bermuda grass | 6.9 | 5.175 | <5.175 | 5.175-6.9 | >6.9 |
Bluestem, Angleton | |||||
Brome, mountain | |||||
Brome, smooth | |||||
Buffelgrass | |||||
Burnet | |||||
Canary grass, reed | |||||
Clover alsike | 1.5 | 1.125 | <1.125 | 1.125-1.5 | >1.5 |
Clover, Berseem | 1.5 | 1.125 | <1.125 | 1.125-1.5 | >1.5 |
Clover, Hubam | |||||
Clover, ladino | 1.5 | 1.125 | <1.125 | 1.125-1.5 | >1.5 |
Clover, red | 1.5 | 1.125 | <1.125 | 1.125-1.5 | >1.5 |
Clover, strawberry | 1.5 | 1.125 | <1.125 | 1.125-1.5 | >1.5 |
Clover, sweet | |||||
Clover, white Dutch | |||||
Corn, forage | 1.8 | 1.35 | <1.35 | 1.35-1.8 | >1.8 |
Cowpea (forage) | 2.5 | 1.875 | <1.875 | 1.875-2.5 | >2.5 |
Dallis grass | |||||
Dhaincha | |||||
Fescue, tall | 3.9 | 2.925 | <2.925 | 2.925-3.9 | >3.9 |
Fescue, meadow | |||||
Foxtail, meadow | 1.5 | 1.125 | <1.125 | 1.125-1.5 | >1.5 |
Glycine | |||||
Grama, blue | |||||
Guinea grass | |||||
Harding grass | 4.6 | 3.45 | <3.45 | 3.45-4.6 | >4.6 |
Kallar grass | |||||
Kikuya grass | |||||
Love grass | 2 | 1.5 | <1.5 | 1.5-2 | >2 |
Milkvetch, cicer | |||||
Millet, Foxtail | |||||
Oatgrass, tall | |||||
Oat (forage) | |||||
Orchard grass | 1.5 | 1.125 | <1.125 | 1.125-1.5 | >1.5 |
Panicgrass, blue | |||||
Paspalum, Polo | |||||
Rape | |||||
Rescue grass | |||||
Rhodes grass | |||||
Rye (forage) | 7.6 | 5.7 | <5.7 | 5.7-7.6 | >7.6 |
Ryegrass, Italian | |||||
Ryegrass, perennial | 5.6 | 4.2 | <4.2 | 4.2-5.6 | >5.6 |
Salt grass, desert | |||||
Sesbania | 2.3 | 1.725 | <1.725 | 1.725-2.3 | >2.3 |
Sirato | |||||
Sphaerophysa | 2.2 | 1.65 | <1.65 | 1.65-2.2 | >2.2 |
Sundan grass | 2.8 | 2.1 | <2.1 | 2.1-2.8 | >2.8 |
Timothy | |||||
Trefoil, big | 2.3 | 1.725 | <1.725 | 1.725-2.3 | >2.3 |
Trefoil, narrowleaf bird's foot | 5 | 3.75 | <3.75 | 3.75-5 | >5 |
Trefoil, broadleaf bird's foot | |||||
Vetch, common | 3 | 2.25 | <2.25 | 2.25-3 | >3 |
Wheat (forage) | 4.5 | 3.375 | <3.375 | 3.375-4.5 | >4.5 |
Wheat, durum (forage) | 2.1 | 1.575 | <1.575 | 1.575-2.1 | >2.1 |
Wheat grass, standard crested | 3.5 | 2.625 | <2.625 | 2.625-3.5 | >3.5 |
Wheat grass, fairway crested | 7.5 | 5.625 | <5.625 | 5.625-7.5 | >7.5 |
Wheat grass, intermediate | |||||
Wheat grass, slender | |||||
Wheat grass, tall | 7.5 | 5.625 | <5.625 | 5.625-7.5 | >7.5 |
Wheat grass, western | |||||
Wild rye, Altai | |||||
Wild rye, beardless | 2.7 | 2.025 | <2.025 | 2.025-2.7 | >2.7 |
Wild rye, Canadian | |||||
Wild rye, Russian | |||||
Artichoke | 6.1 | 4.575 | <4.575 | 4.575-6.1 | >6.1 |
Asparagus | 4.1 | 3.075 | <3.075 | 3.075-4.1 | >4.1 |
Bean, Common | 1 | 0.75 | <0.75 | 0.75-1 | >1 |
Bean, Mung | 1.8 | 1.35 | <1.35 | 1.35-1.8 | >1.8 |
Beet, red | 4 | 3 | <3 | 3-4 | >4 |
Broccoli | 2.8 | 2.1 | <2.1 | 2.1-2.8 | >2.8 |
Brussels sprouts | |||||
Cabbage | 1.8 | 1.35 | <1.35 | 1.35-1.8 | >1.8 |
Carrot | 1 | 0.75 | <0.75 | 0.75-1 | >1 |
Cauliflower | |||||
Celery | 1.8 | 1.35 | <1.35 | 1.35-1.8 | >1.8 |
Corn, sweet | 1.7 | 1.275 | <1.275 | 1.275-1.7 | >1.7 |
Cowpea | 4.9 | 3.675 | <3.675 | 3.675-4.9 | >4.9 |
Cucumber | 2.5 | 1.875 | <1.875 | 1.875-2.5 | >2.5 |
Eggplant | 1.1 | 0.825 | <0.825 | 0.825-1.1 | >1.1 |
Garlic | 3.9 | 2.925 | <2.925 | 2.925-3.9 | >3.9 |
Kale | |||||
Kohlrabi | |||||
Lettuce | 1.3 | 0.975 | <0.975 | 0.975-1.3 | >1.3 |
Muskmelon | 1 | 0.75 | <0.75 | 0.75-1 | >1 |
Okra | |||||
Onion | 1.2 | 0.9 | <0.9 | 0.9-1.2 | >1.2 |
Onion, Seed | 1 | 0.75 | <0.75 | 0.75-1 | >1 |
Parsnip | |||||
Pea | 3.4 | 2.55 | <2.55 | 2.55-3.4 | >3.4 |
Pepper | 1.5 | 1.125 | <1.125 | 1.125-1.5 | >1.5 |
Potato | 1.7 | 1.275 | <1.275 | 1.275-1.7 | >1.7 |
Purslane | 6.3 | 4.725 | <4.725 | 4.725-6.3 | >6.3 |
Pumpkin | |||||
Radish | 1.2 | 0.9 | <0.9 | 0.9-1.2 | >1.2 |
Spinach | 2 | 1.5 | <1.5 | 1.5-2 | >2 |
Squash, scallop | 3.2 | 2.4 | <2.4 | 2.4-3.2 | >3.2 |
Squash, zucchini | 4.9 | 3.675 | <3.675 | 3.675-4.9 | >4.9 |
Strawberry | 1 | 0.75 | <0.75 | 0.75-1 | >1 |
Sweet potato | 1.5 | 1.125 | <1.125 | 1.125-1.5 | >1.5 |
Tomato | 2.5 | 1.875 | <1.875 | 1.875-2.5 | >2.5 |
Tomato, cherry | 1.7 | 1.275 | <1.275 | 1.275-1.7 | >1.7 |
Turnip | 0.9 | 0.675 | <0.675 | 0.675-0.9 | >0.9 |
Turnip, greens | 3.3 | 2.475 | <2.475 | 2.475-3.3 | >3.3 |
Watermelon | |||||
Almond | 1.5 | 1.125 | <1.125 | 1.125-1.5 | >1.5 |
Apple | |||||
Apricot | 1.6 | 1.2 | <1.2 | 1.2-1.6 | >1.6 |
Avocado | |||||
Blackberry | 1.5 | 1.125 | <1.125 | 1.125-1.5 | >1.5 |
Boysenberry | 1.5 | 1.125 | <1.125 | 1.125-1.5 | >1.5 |
Castorbean | |||||
Cherimoya | |||||
Cherry, sweet | |||||
Cherry, sand | |||||
Currant | |||||
Date palm | 4 | 3 | <3 | 3-4 | >4 |
Fig | |||||
Gooseberry | |||||
Grape | 1.5 | 1.125 | <1.125 | 1.125-1.5 | >1.5 |
Grapefruit | 1.2 | 0.9 | <0.9 | 0.9-1.2 | >1.2 |
Guayule | 15 | 11.25 | <11.25 | 11.25-15 | >15 |
Jojoba | |||||
Jujube | |||||
Lemon | 1.5 | 1.125 | <1.125 | 1.125-1.5 | >1.5 |
Lime | |||||
Loquat | |||||
Mango | |||||
Olive | 4 | 3 | <3 | 3-4 | >4 |
Orange | 1.3 | 0.975 | <0.975 | 0.975-1.3 | >1.3 |
Papaya | |||||
Passion fruit | |||||
Peach | 1.7 | 1.275 | <1.275 | 1.275-1.7 | >1.7 |
Pear | |||||
Persimmon | |||||
Pineapple | |||||
Pistacio | |||||
Plum; Prune | 2.6 | 1.95 | <1.95 | 1.95-2.6 | >2.6 |
Pomegranate | |||||
Pummelo | |||||
Raspberry | |||||
Rose apple | |||||
Sapote, white | |||||
Tangerine |