Nitrate Sources and Nitrate Loading. Historical Yield of Burley Tobacco in Kentucky.

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Presentation transcript:

Nitrate Sources and Nitrate Loading

Historical Yield of Burley Tobacco in Kentucky

Manganese Toxicity

Effects of Nitrogen Application on Soil pH All plots received 150 lbs P 2 O 5 and 250 lbs K 2 0

Effect of Liming an Acid Soil Prior to Use of Urea and Sodium Nitrate Sources of Nitrogen Both N sources applied at 225 lb N/A pre-plant. Soil pH (water) measured at midseason of each year. Soil pH before liming was 5.4.

Effect of Liming an Acid Soil Prior to Use of Urea and Sodium Nitrate Sources of Nitrogen Both N sources applied at 225 lb N/A pre-plant.

Acidifying or Neutralizing Effects of Nitrogen Sources

Attributes of Nitrate Nitrogen Prevent acid soils and low pH Prevent acid soils and low pH Reduce chance of Nitrate loading of plants Reduce chance of Nitrate loading of plants  Reduces green cure  Reduces fat stems  Which can freeze and bleed onto leaf  Which can lead to high moisture reading at market

Rank Green Tobacco at Harvest

Fat Stem Cause Poor Curing

Green Tobacco after Curing

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