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Crop Code No. 099

 

 

 

 

 

Tobacco

 

Soil Groups 1, 2, or 3

 

 

 

Desired pH 5.8 – 6.2

Phosphorus

Potassium

 

Low

Medium

Sufficient

High

Excessive

 

Pounds of N-P2O5-K2O per acre

Low

70-120-200

70-120-140

70-120-120

70-120-100

70-120-80

Medium

70-  80-200

70-  80-140

70-  80-120

70-  80-100

70-  80-80

Sufficient

70-  40-200

70-  40-140

70-  40-120

70-  40-100

70-  40-80

High

70-  20-200

70-  20-140

70-  20-120

70-  20-100

70-  20-80

Excessive

70-    0-200

70-    0-140

70-    0-120

70-    0-100

70-    0-80

COMMENTS (1, 70, 72, 89, 90, 650, 651, 652, 653)

70  Apply 100-150 lbs magnesium sulfate (Epsom salts), or 20-30 lbs magnesium oxide, or 90-140 lbs sulfate of potash-magnesium per acre, or as a mixed fertilizer containing sufficient magnesium to supply 10 to 15 lbs magnesium per acre.  (When lime is not recommended and soil test magnesium is low)

72  Apply 435 lbs gypsum per acre, or a calcium-containing fertilizer to supply 100 lbs calcium per acre, or 500 lbs dolomitic or calcitic limestone per acre.   (When lime is not recommended and soil test Ca is less than 400 lbs calcium per acre)

89  Apply "preplant" fertilizer in two bands about 8 to 12 inches apart and slightly below the root crown at time of transplanting or within 10 days after transplanting.

If the clay layer is within 12 inches of the surface, the nitrogen rate should be decreased to 60 lbs nitrogen per acre, and if the clay layer is deeper than 16 inches from the surface, increase to 80 lbs nitrogen per acre.  For the tobacco following soybeans or highly fertilized corn (greater than 120 lbs nitrogen per acre), reduce nitrogen rate to 50 to 60 lbs nitrogen per acre.

Any nitrogen in addition to that applied preplant and recommended potassium should be sidedressed.  For sidedressing nitrogen the nitrate form is preferable but recent studies indicate that nitrogen solutions or ammonium nitrate can be successfully used.  All nitrogen should be in the nitrate form. Use calcium nitrate if no potassium is recommended.  Potassium nitrate is preferred if additional potassium is needed.  If formulated fertilizer is used, it is preferred that all the nitrogen should be in the nitrate form and potassium should be in the nitrate or sulfate form.  Potassium chloride (muriate of potash) should not be used as a potassium source.

For Extended Harvest System use the following adjustments to the normal rate:

Early Harvest: 3/4 normal nitrogen rate

Mid-harvest: normal nitrogen rate

Late Harvest: 1 and 1/4 normal nitrogen rate

 

90  If lime is to be applied to the previous crop to raise the soil pH to 6.5, then lime rate should be reduced by 25%.  If the soil pH is greater than 6.2, call your County Agent for additional information. (When soil pH is above 6.2)

651  The soil test boron is low, however, this is not a boron sensitive crop, therefore no boron is recommended.  (When soil test boron is low)

652  The soil test manganese is low, however, this is not a manganese sensitive crop, therefore no manganese is recommended.  (When soil test manganese is low)

653  The soil test zinc is low, however, this is not a zinc sensitive crop, therefore no zinc is recommended.  (When soil test zinc is low)