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Crop requirement <br /> Micronutrient High Medium Low Deficiency situations Fertilizer recommendations <br /> zinc(Zn) onion bean,lima asparagus -low organic matter 1. Broadcast soil application: <br /> spinach beet cabbage -soil pH>7.0 +2-10 lbs Zn/acre(ZnSO4,ZnO) <br /> sweet corn cucumber carrot -very high phosphorus +1-2 lbs Zn/acre(Zn-chelate) <br /> lettuce pea -restricted root zone <br /> potato -sandy soils 2. Band soil application: <br /> tomato -organic soils +2-4 lbs Zn/acre(ZnSO4) <br /> -prolonged cool wet <br /> conditions 3. Foliar application: <br /> -tissue< 15-20 ppm +1.0 lb Zn/acre(ZnSO4)in 20 gal <br /> +0.1-0.2 lbs Zn/ac chelate in 20 gal <br /> manganese(Mn) bean,lima broccoli asparagus -soil pH>6.8 1. Band soil application: <br /> lettuce b.sprouts -restricted root zone +3.0-5.0 lbs NWacre(MnSO4,MnO) <br /> onions cabbage -organic soils +0.5-1.0 lbs Wacre(Mn-chelate) <br /> spinach carrot -sandy soils <br /> cauliflower -prolonged cool wet 2. Foliar application: <br /> celery conditions +1.0-3.0 lbs NWacre(MnSO4,MnO) <br /> cucumber -tissue< 10-20 ppm +0.1-0.25 lbs NWacre(Mn-chelate) <br /> peas <br /> potato 3. Broadcast soil application: <br /> sweet corn +10-25 lbs MWacre(MnSO4,MnO) <br /> tomato (may not be effective due to rapid <br /> turnip soil fixation of Mn <br /> boron(B) beet asparagus bean,lima -low organic matter 1. Broadcast soil application: <br /> broccoli carrot cucumber -high pH(>7.4) +0.5-3.0 lbs B/acre(borax,boric acid) <br /> b. sprouts lettuce pea -strongly weathered [depending on crop sensitivity] <br /> cabbage melon pepper soils <br /> cauliflower onion potato -sandy soils 2. Foliar application: <br /> celery parsnip -droughty conditions +generally not used <br /> mustard radish -tissue< 10-20 ppm <br /> rutabaga spinach (dicots) comments-most common/widespread <br /> turnip sweet corn -tissue<2-10 ppm micronutrient deficiency <br /> sweet potato (monocots) <br /> tomato <br />