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ARS Home Pacific West Area Riverside, California Agricultural Water Efficiency and Salinity Research Unit Docs Databases





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- Fiber, Grain and Special Crops
- Grasses and Forage Crops
- Boron Tolerance of Crops

Boron Tolerance Limits for Agricultural Crops Mass (1990)
 - Very Sensitive - Common Name
Botanical Name
Threshold (a); mg/L
Slope; %per mg/LLemon (b)
Citrus limon
<0.5
--Blackberry (b)
Rubus sp.
<0.5
--
 
 - Sensitive - Common Name
Botanical Name
Threshold (a); mg/L
Slope; %per mg/LAvocado (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
3.3Sunflower
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
12Bean, 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/LBroccoli
Brassica oleracea botrytis
1.0
1.8Pepper, 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
1.4Potato
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/LCabbage (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
4.4Cowpea
Vigna unguiculata
2.5
12Oats
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/LAlfalfa (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
4.1Tomato
Lycopersicum
5.7
3.4
 
 - Very Tolerant - Common Name
Botanical Name
Threshold (a); mg/L
Slope; %per mg/LSorghum
Sorghum bicolor
7.4
4.7Cotton
Gossypium hirsutum
6.0-10.0
--Celery (b)
Apium graveolens
9.8
3.2Asparagus (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.


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