Boron Tolerance Limits for Agricultural Crops
Mass (1990)
- Very Sensitive -
| Common Name |
Botanical Name |
Threshold (a); mg/L |
Slope; %per mg/L |
| Lemon (b) |
Citrus limon |
<0.5 |
-- |
| Blackberry (b) |
Rubus sp. |
<0.5 |
-- |
- Sensitive -
| Common Name |
Botanical Name |
Threshold (a); mg/L |
Slope; %per mg/L |
| Avocado (b) |
Persea americana |
0.5-0.75 |
-- |
| Grapefruit (b) |
C. x paradisi |
0.5-0.75 |
-- |
| Orange (b) |
C. sinensis |
0.5-0.75 |
-- |
| Apricot (b) |
Prunus armeniaca |
0.5-0.75 |
-- |
| Peach (b) |
P. persica |
0.5-0.75 |
-- |
| Cherry (b) |
P. avium |
0.5-0.75 |
-- |
| Plum (b) |
P. domestica |
0.5-0.75 |
-- |
| Persimmon (b) |
Diospyros kaki |
0.5-0.75 |
-- |
| Fig, kadota (b) |
Ficus carica |
0.5-0.75 |
-- |
| Grape (b) |
Vitis vinifera |
0.5-0.75 |
-- |
| Walnut (b) |
Juglans regia |
0.5-0.75 |
-- |
| Pecan (b) |
Carya illinoinenis |
0.5-0.75 |
-- |
| Onion |
Allium cepa |
0.5-0.75 |
-- |
| Garlic |
A. sativum |
0.75-1.0 |
-- |
| Sweet potato |
Ipomea batatas |
0.75-1.0 |
-- |
| Wheat |
Triticum aestivum |
0.75-1.0 |
3.3 |
| Sunflower |
Helianthus annuus |
0.75-1.0 |
-- |
| Bean, mung (b) |
Vigna radiata |
0.75-1.0 |
-- |
| Sesame (b) |
Sesamum indicum |
0.75-1.0 |
-- |
| Lupine (b) |
Lupinus hartwegii |
0.75-1.0 |
-- |
| Strawberry (b) |
Fragaria sp. |
0.75-1.0 |
-- |
| Artichoke, Jerusalem (b) |
Helianthus tuberosus |
0.75-1.0 |
-- |
| Bean, kidney (b) |
Phaseolus vulgaris |
0.75-1.0 |
-- |
| Bean, snap |
P. vulgaris |
1.0 |
12 |
| Bean, lima (b) |
P. lunatus |
0.75-1.0 |
-- |
| Peanut |
Arachis hypogaea |
0.75-1.0 |
-- |
- Moderately Sensitive -
| Common Name |
Botanical Name |
Threshold (a); mg/L |
Slope; %per mg/L |
| Broccoli |
Brassica oleracea botrytis |
1.0 |
1.8 |
| Pepper, red |
Capsicum annuum |
1.0-2.0 |
-- |
| Pea (b) |
Pisum sativa |
1.0-2.0 |
-- |
| Carrot |
Daucus carota |
1.0-2.0 |
-- |
| Radish |
Raphanus sativus |
1.0 |
1.4 |
| Potato |
Solanum tuberosum |
1.0-2.0 |
-- |
| Cucumber |
Cucumis stivus |
1.0-2.0 |
-- |
| Lettuce (b) |
Lactuca sativa |
1.3 |
1.7 |
- Moderately Tolerant -
| Common Name |
Botanical Name |
Threshold (a); mg/L |
Slope; %per mg/L |
| Cabbage (b) |
Brassica oleracea capitata |
2.0-4.0 |
-- |
| Turnip |
B. rapa |
2.0-4.0 |
-- |
| Bluegrass, Kentucky (b) |
Poa pratensis |
2.0-4.0 |
-- |
| Barley |
Hordeum vulgare |
3.4 |
4.4 |
| Cowpea |
Vigna unguiculata |
2.5 |
12 |
| Oats |
Avena sativa |
2.0-4.0 |
-- |
| Corn |
Zea mays |
2.0-4.0 |
-- |
| Artichoke (b) |
Cynara scolymus |
2.0-4.0 |
-- |
| Tobacco (b) |
Nicotiana tabacum |
2.0-4.0 |
-- |
| Mustard (b) |
Brassica juncea |
2.0-4.0 |
-- |
| Clover, sweet (b) |
Melilotus indica |
2.0-4.0 |
-- |
| Squash |
Cucurbita pepo |
2.0-4.0 |
-- |
| Muskmelon (b) |
Cucumis melo |
2.0-4.0 |
-- |
| Cauliflower |
B. oleracea botrytis |
4.0 |
1.9 |
- Tolerant -
| Common Name |
Botanical Name |
Threshold (a); mg/L |
Slope; %per mg/L |
| Alfalfa (b) |
Medicago sativa |
4.0-6.0 |
-- |
| Vetch, purple (b) |
Vicia benghalensis |
4.0-6.0 |
-- |
| Parsley (b) |
Petroselinum crispum |
4.0-6.0 |
-- |
| Beet, red |
Beta vulgaris |
4.0-6.0 |
-- |
| Sugar beet |
B. vulgaris |
4.9 |
4.1 |
| Tomato |
Lycopersicum |
5.7 |
3.4 |
- Very Tolerant -
| Common Name |
Botanical Name |
Threshold (a); mg/L |
Slope; %per mg/L |
| Sorghum |
Sorghum bicolor |
7.4 |
4.7 |
| Cotton |
Gossypium hirsutum |
6.0-10.0 |
-- |
| Celery (b) |
Apium graveolens |
9.8 |
3.2 |
| Asparagus (b) |
Asparagus officinalis |
10.0-15.0 |
-- |
Notes:
(a) Maximum permissible concentration in soil water without yield reduction. Boron tolerances may vary, depending upon climate, soil conditions, and crop varieties.
(b) Tolerance based on reduction in vegetative growth.
