Fertility Trials Increasing rates of nitrogen fertilizer beyond 150 lb/a can lower soil pH but does not necessary increase yield. Burley tobacco fertilized.

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Presentation transcript:

Fertility Trials Increasing rates of nitrogen fertilizer beyond 150 lb/a can lower soil pH but does not necessary increase yield. Burley tobacco fertilized with 1200 lb/a of nitrogen yielded significantly better than 450 lb/a, but was not significantly better than other treatments. Tobacco fertilized with 450 lb/a ammonium nitrate plus 714 lb/a of (calcium nitrate plus potassium nitrate) yielded very close to that of 1200 lb/a of ammonium nitrate, but with 150 lb/a less nitrogen. Nitrogen rate increase did not correlate well with Total TSNA, NNN, nitrate and nitrite levels but slight increases were common.

Fertility Trials (continued) Nitrogen fertilizer sources applied at 250 lb/a produced similar results. However, the treatment of 450 ammonium nitrate down with 645 lb/a of calcium nitrate produces higher yields than either treatment that received urea. Total TSNA, NNN, nitrate and nitrite levels were not influenced by nitrogen sources.

Effects of Nitrogen Rate on Burley Yield Across 4 Locations All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate is a calcium/potassium nitrate mix. Locations = Fayette, Jackson, Madison & Shelby Counties. Nitrogen at 1200 lb/a produced significantly more yield than 450 lb/a. There were no other significant differences.

Effects of Nitrogen Rate on Burley Cured Leaf Chemistry Across 4 Locations All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate is a calcium/potassium nitrate mix. Nitrates could not be analyzed across locations due to treatment*location interactions

Effects of Nitrogen Rate on Soil pH Fayette Co. – John Mahan Farm All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate.

Effects of Nitrogen Rate on Burley Vigor Fayette Co. – John Mahan Farm All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate.

Effects of Nitrogen Rate on Blue Mold Fayette Co. – John Mahan Farm All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate Scale is 0 best – 10 worst.

Effects of Nitrogen Rate on Burley Yield Fayette Co. – John Mahan Farm All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate is a calcium/potassium nitrate mix Yields were affected by Blue Mold

Effects of Nitrogen Rate on Burley Cured Leaf Chemistry Fayette Co. – John Mahan Farm All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate is a calcium/potassium nitrate mix

Effects of Nitrogen Rate on Soil pH Jackson Co. – Jerry Neeley Farm All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate. Variety = 14xL8

Effects of Nitrogen Rate on Early Season Burley Vigor Jackson Co. – Jerry Neeley Farm All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate, MS=mid-season, LS=late season. Variety = 14xL8

Effects of Nitrogen Rate on Burley Yield Jackson Co. – Jerry Neeley Farm All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate is a calcium/potassium nitrate mix Variety = 14xL8

Effects of Nitrogen Rate on Burley Cured Leaf Chemistry Jackson Co. – Jerry Neeley Farm All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate is a calcium/potassium nitrate mix Variety = 14xL8

Effects of Nitrogen Source on Burley Yield Lincoln Co. – Dan Cooper Farm Number = lb/a, U = Urea, AN = Ammonium Nitrate, CN=Calcium Nitrate, SN = Sodium Nitrate is a calcium & potassium nitrate mix. Initial nitrogen was broadcast with addition sidedressed Yields were affected by Blue Mold Variety = NC 5

Effects of Nitrogen Rate on Burley Cured Leaf Chemistry Lincoln Co. – Dan Cooper Farm All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate is a calcium/potassium nitrate mix Variety = NC 5

Effects of Nitrogen Rate on Soil pH Madison Co. – Gregg Harris Farm All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate. Variety = 14xL8

Effects of Nitrogen Rate on Early Season Burley Vigor Madison Co. – Gregg Harris Farm All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate. Variety = 14xL8

Effects of Nitrogen Rate on Burley Yield Madison Co. – Gregg Harris Farm All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate is a calcium/potassium nitrate mix Variety = 14xL8

Effects of Nitrogen Rate on Burley Cured Leaf Chemistry Madison Co. – Gregg Harris Farm All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate is a calcium/potassium nitrate mix Variety = 14xL8

Effects of Nitrogen Rate on Soil pH Shelby Co. – Ray Tucker, Jr. Farm All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate. Variety = KT200

Effects of Nitrogen Rate on Early Season Burley Vigor Shelby Co. – Ray Tucker, Jr. Farm All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate. Variety = KT200

Effects of Nitrogen Rate on Burley Yield Shelby Co. – Ray Tucker, Jr. Farm All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate. LSD not available due to missing Value. However, adding 714 lb/a significantly improved yield over 450 lb/a alone Variety = KT200

Effects of Nitrogen Rate on Burley Cured Leaf Chemistry Shelby Co. – Ray Tucker, Jr. Farm All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate is a calcium/potassium nitrate mix Variety = KT200