Wairau/Awatere Resource Management Plan Table P8 - Relative Tolerance of Agricultural Crops to Boron Tolerance* Concentration Agricultural Crop of boron in soil water (mg/L)** Very sensitive <0.5 Blackberry Sensitive 0.5-1.0 Peach, cherry, plum, grape, cowpea, onion, garlic, sweet potato, wheat, barley, sunflower, mung bean, sesame, lupin, strawberry, Jerusalem artichoke, kidney beans, lima beans Moderately sensitive 1.0-2.0 Red pepper, pea, carrot, radish, potato, cucumber Moderately tolerant 2.0-4.0 Lettuce, cabbage, celery, turnip, Kentucky bluegrass, oat, corn, artichoke, tobacco, mustard, clover, squash, musk melon. Tolerant 4.0-6.0 Sorghum, tomato, alfalfa, purple, vetch, parsley, red beet, sugar-beet. Very Tolerant 6.0-15.0 Asparagus * Tolerance will vary with climate, soil conditions and crop varieties; values are to be used as a guideline only. ** Maximum concentrations tolerated in irrigation water without reduction in yield or vegetative growth are approximately equal to soil water values. App P - 8