Fertility Trials Increasing rates of nitrogen fertilizer beyond 150 lb/a can lower soil pH but does...
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![Page 1: Fertility Trials Increasing rates of nitrogen fertilizer beyond 150 lb/a can lower soil pH but does not necessary increase yield. Burley tobacco fertilized.](https://reader030.fdocuments.in/reader030/viewer/2022032606/56649eab5503460f94bb1a69/html5/thumbnails/1.jpg)
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 14-0-14 (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.
![Page 2: Fertility Trials Increasing rates of nitrogen fertilizer beyond 150 lb/a can lower soil pH but does not necessary increase yield. Burley tobacco fertilized.](https://reader030.fdocuments.in/reader030/viewer/2022032606/56649eab5503460f94bb1a69/html5/thumbnails/2.jpg)
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.
![Page 3: Fertility Trials Increasing rates of nitrogen fertilizer beyond 150 lb/a can lower soil pH but does not necessary increase yield. Burley tobacco fertilized.](https://reader030.fdocuments.in/reader030/viewer/2022032606/56649eab5503460f94bb1a69/html5/thumbnails/3.jpg)
Effects of Nitrogen Rate on Burley Yield Across 4 Locations
359 356 345 352 330 371 367
1125 1170 1174 1145 1188 1193 1170
711 721 776 790 823 851 820
78
239
83
2882357241523412286229522472195
0
500
1000
1500
2000
2500
450 AN 600 AN 750 AN 900 AN 1050 AN 1200 AN 450 AN + 714 14-0-14
LSD
Yie
ld lb
/a
Flyings Lugs Tips
All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate. 14-0-14 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.
![Page 4: Fertility Trials Increasing rates of nitrogen fertilizer beyond 150 lb/a can lower soil pH but does not necessary increase yield. Burley tobacco fertilized.](https://reader030.fdocuments.in/reader030/viewer/2022032606/56649eab5503460f94bb1a69/html5/thumbnails/4.jpg)
Effects of Nitrogen Rate on Burley Cured Leaf Chemistry Across 4 Locations
0
5
10
15
20
450 AN 600 AN 750 AN 900 AN 1050 AN 1200 AN 450 AN + 714 14-0-14
pp
m
NNN Total TSNA Nitrite
All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate. 14-0-14 is a calcium/potassium nitrate mix.
Nitrates could not be analyzed across locations due to treatment*location interactions
![Page 5: Fertility Trials Increasing rates of nitrogen fertilizer beyond 150 lb/a can lower soil pH but does not necessary increase yield. Burley tobacco fertilized.](https://reader030.fdocuments.in/reader030/viewer/2022032606/56649eab5503460f94bb1a69/html5/thumbnails/5.jpg)
Effects of Nitrogen Rate on Soil pH
Fayette Co. – John Mahan Farm
5.9 5.8375 5.7375 5.6 5.625 5.63755.48750.24
0
1
2
3
4
5
6
7
8
450 AN 600 AN 750 AN 900 AN 1050 AN 1200 AN 450 AN + 714
14-0-14
LSD
pH
All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate.
![Page 6: Fertility Trials Increasing rates of nitrogen fertilizer beyond 150 lb/a can lower soil pH but does not necessary increase yield. Burley tobacco fertilized.](https://reader030.fdocuments.in/reader030/viewer/2022032606/56649eab5503460f94bb1a69/html5/thumbnails/6.jpg)
Effects of Nitrogen Rate on Burley Vigor
Fayette Co. – John Mahan Farm
32.5 36.25 31.25 35 33.75 37.5
8.26
66.25 66.25 6573.75 75
68.75 66.25
11.5736.25
0
20
40
60
80
100
450 AN 600 AN 750 AN 900 AN 1050 AN 1200 AN 450 AN + 714 14-0-14
LSD
%
Vigor Mid Season Vigor LateSeason
All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate.
![Page 7: Fertility Trials Increasing rates of nitrogen fertilizer beyond 150 lb/a can lower soil pH but does not necessary increase yield. Burley tobacco fertilized.](https://reader030.fdocuments.in/reader030/viewer/2022032606/56649eab5503460f94bb1a69/html5/thumbnails/7.jpg)
Effects of Nitrogen Rate on Blue Mold
Fayette Co. – John Mahan Farm
2.251.5
2.5 2 2.5 21.1
1.752.25
1.75
2.75
1.75 1.75
2.75
1.212.75
0
2
4
6
8
10
450 AN 600 AN 750 AN 900 AN 1050 AN 1200 AN 450 AN + 714 14-0-14
LSD
Inci
den
ce
Blue Mold Mid Season Blue Mold Late Season
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.
![Page 8: Fertility Trials Increasing rates of nitrogen fertilizer beyond 150 lb/a can lower soil pH but does not necessary increase yield. Burley tobacco fertilized.](https://reader030.fdocuments.in/reader030/viewer/2022032606/56649eab5503460f94bb1a69/html5/thumbnails/8.jpg)
Effects of Nitrogen Rate on Burley Yield
Fayette Co. – John Mahan Farm
273 295 276 319 286 299 280
1491 1460 14471619 1468 1510 1535
387 364 403365
355 370 359
78
239
83
2882174217921092302212621202150
0
500
1000
1500
2000
2500
450 AN 600 AN 750 AN 900 AN 1050 AN 1200 AN 450 AN + 714 14-0-14
LSD
Yie
ld l
b/a
Flyings Lugs Tips
All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate. 14-0-14 is a calcium/potassium nitrate mix
Yields were affected by Blue Mold
![Page 9: Fertility Trials Increasing rates of nitrogen fertilizer beyond 150 lb/a can lower soil pH but does not necessary increase yield. Burley tobacco fertilized.](https://reader030.fdocuments.in/reader030/viewer/2022032606/56649eab5503460f94bb1a69/html5/thumbnails/9.jpg)
Effects of Nitrogen Rate on Burley Cured Leaf Chemistry
Fayette Co. – John Mahan Farm
0
2
4
6
8
10
12
450 AN 600 AN 750 AN 900 AN 1050 AN 1200 AN 450 AN + 714 14-0-14
pp
m (
Nit
rate
in
pp
t)
NNN Total TSNA Nitrite Nitrate
All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate. 14-0-14 is a calcium/potassium nitrate mix
![Page 10: Fertility Trials Increasing rates of nitrogen fertilizer beyond 150 lb/a can lower soil pH but does not necessary increase yield. Burley tobacco fertilized.](https://reader030.fdocuments.in/reader030/viewer/2022032606/56649eab5503460f94bb1a69/html5/thumbnails/10.jpg)
Effects of Nitrogen Rate on Soil pH
Jackson Co. – Jerry Neeley Farm
5.7375 5.825 5.75 5.955.4375
5.9255.4375 0.37
0
1
2
3
4
5
6
7
8
450 AN 600 AN 750 AN 900 AN 1050 AN 1200 AN 450 AN + 714
14-0-14
LSD
pH
All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate.
Variety = 14xL8
![Page 11: Fertility Trials Increasing rates of nitrogen fertilizer beyond 150 lb/a can lower soil pH but does not necessary increase yield. Burley tobacco fertilized.](https://reader030.fdocuments.in/reader030/viewer/2022032606/56649eab5503460f94bb1a69/html5/thumbnails/11.jpg)
Effects of Nitrogen Rate on Early Season Burley Vigor
Jackson Co. – Jerry Neeley Farm
7060 63.75 66.25
48.7557.5
17.03
60
0
20
40
60
80
100
450 AN 600 AN 750 AN 900 AN 1050 AN 1200 AN 450 AN + 714 14-0-14
LSD
%
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
![Page 12: Fertility Trials Increasing rates of nitrogen fertilizer beyond 150 lb/a can lower soil pH but does not necessary increase yield. Burley tobacco fertilized.](https://reader030.fdocuments.in/reader030/viewer/2022032606/56649eab5503460f94bb1a69/html5/thumbnails/12.jpg)
Effects of Nitrogen Rate on Burley Yield
Jackson Co. – Jerry Neeley Farm
332 333 374 355 299 376 288
777 773908 890 953
996
685
319 325352 341 371
368
325
64
259
85
3681298174016231586163414311428
0
500
1000
1500
2000
450 AN 600 AN 750 AN 900 AN 1050 AN 1200 AN 450 AN + 714 14-0-14
LSD
Yie
ld l
b/a
Flyings Lugs Tips
All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate. 14-0-14 is a calcium/potassium nitrate mix
Variety = 14xL8
![Page 13: Fertility Trials Increasing rates of nitrogen fertilizer beyond 150 lb/a can lower soil pH but does not necessary increase yield. Burley tobacco fertilized.](https://reader030.fdocuments.in/reader030/viewer/2022032606/56649eab5503460f94bb1a69/html5/thumbnails/13.jpg)
Effects of Nitrogen Rate on Burley Cured Leaf Chemistry
Jackson Co. – Jerry Neeley Farm
0
2
4
6
8
10
450 AN 600 AN 750 AN 900 AN 1050 AN 1200 AN 450 AN + 714 14-0-14
pp
m (
Nit
rate
in
pp
t)
NNN Total TSNA Nitrite Nitrate
All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate. 14-0-14 is a calcium/potassium nitrate mix
Variety = 14xL8
![Page 14: Fertility Trials Increasing rates of nitrogen fertilizer beyond 150 lb/a can lower soil pH but does not necessary increase yield. Burley tobacco fertilized.](https://reader030.fdocuments.in/reader030/viewer/2022032606/56649eab5503460f94bb1a69/html5/thumbnails/14.jpg)
Effects of Nitrogen Source on Burley Yield
Lincoln Co. – Dan Cooper Farm
431 453 488 466 489 384 427
1118 1106 1117 10361221
1148 1163
551 548 570541
649519
634
80
181
102
2342224205123592042217421062101
0
500
1000
1500
2000
2500
556 U 333 U 300 AN
750 AN 450 AN 300 AN
450 AN 645 CN
450 AN 625 SN
450 AN 714 14-0-14
LSD
Yie
ld l
b/a
Flyings Lug Leaf
Number = lb/a, U = Urea, AN = Ammonium Nitrate, CN=Calcium Nitrate, SN = Sodium Nitrate14-0-14 is a calcium & potassium nitrate mix. Initial nitrogen was broadcast with addition sidedressed
Yields were affected by Blue Mold
Variety = NC 5
![Page 15: Fertility Trials Increasing rates of nitrogen fertilizer beyond 150 lb/a can lower soil pH but does not necessary increase yield. Burley tobacco fertilized.](https://reader030.fdocuments.in/reader030/viewer/2022032606/56649eab5503460f94bb1a69/html5/thumbnails/15.jpg)
Effects of Nitrogen Rate on Burley Cured Leaf Chemistry
Lincoln Co. – Dan Cooper Farm
0
2
4
6
8
10
556 U 333 U 300 AN
750 AN 450 AN 300 AN
450 AN 645 CN
450 AN 625 SN
450 AN 714 14-0-14
pp
m (
Nit
rate
in
pp
t)
NNN Total TSNA Nitrite Nitrate
All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate. 14-0-14 is a calcium/potassium nitrate mix
Variety = NC 5
![Page 16: Fertility Trials Increasing rates of nitrogen fertilizer beyond 150 lb/a can lower soil pH but does not necessary increase yield. Burley tobacco fertilized.](https://reader030.fdocuments.in/reader030/viewer/2022032606/56649eab5503460f94bb1a69/html5/thumbnails/16.jpg)
Effects of Nitrogen Rate on Soil pH
Madison Co. – Gregg Harris Farm
6.975 6.7 6.75 6.9 6.85 6.956.675
0.23
0
1
2
3
4
5
6
7
8
450 AN 600 AN 750 AN 900 AN 1050 AN 1200 AN 450 AN + 714
14-0-14
LSD
pH
All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate.
Variety = 14xL8
![Page 17: Fertility Trials Increasing rates of nitrogen fertilizer beyond 150 lb/a can lower soil pH but does not necessary increase yield. Burley tobacco fertilized.](https://reader030.fdocuments.in/reader030/viewer/2022032606/56649eab5503460f94bb1a69/html5/thumbnails/17.jpg)
Effects of Nitrogen Rate on Early Season Burley Vigor
Madison Co. – Gregg Harris Farm
56.25 53.75 53.75 48.75 51.25 57.5
12.65
47.5
0
20
40
60
80
100
450 AN 600 AN 750 AN 900 AN 1050 AN 1200 AN 450 AN + 714 14-0-14
LSD
%
All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate.
Variety = 14xL8
![Page 18: Fertility Trials Increasing rates of nitrogen fertilizer beyond 150 lb/a can lower soil pH but does not necessary increase yield. Burley tobacco fertilized.](https://reader030.fdocuments.in/reader030/viewer/2022032606/56649eab5503460f94bb1a69/html5/thumbnails/18.jpg)
Effects of Nitrogen Rate on Burley Yield
Madison Co. – Gregg Harris Farm
545 517 453 461 461 466 564
1667 1669 1839 1516 1801 1772 1815
600 628 600719
666 693 639
187
238
171
3563019293129282695289328132810
0
500
1000
1500
2000
2500
3000
3500
450 AN 600 AN 750 AN 900 AN 1050 AN 1200 AN 450 AN + 714 14-0-14
LSD
Yie
ld l
b/a
Flyings Lugs Tips
All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate. 14-0-14 is a calcium/potassium nitrate mix
Variety = 14xL8
![Page 19: Fertility Trials Increasing rates of nitrogen fertilizer beyond 150 lb/a can lower soil pH but does not necessary increase yield. Burley tobacco fertilized.](https://reader030.fdocuments.in/reader030/viewer/2022032606/56649eab5503460f94bb1a69/html5/thumbnails/19.jpg)
Effects of Nitrogen Rate on Burley Cured Leaf Chemistry
Madison Co. – Gregg Harris Farm
0
2
4
6
8
10
450 AN 600 AN 750 AN 900 AN 1050 AN 1200 AN 450 AN + 714 14-0-14
pp
m (
Nit
rate
in
pp
t)
NNN Total TSNA Nitrite Nitrate
All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate. 14-0-14 is a calcium/potassium nitrate mix
Variety = 14xL8
![Page 20: Fertility Trials Increasing rates of nitrogen fertilizer beyond 150 lb/a can lower soil pH but does not necessary increase yield. Burley tobacco fertilized.](https://reader030.fdocuments.in/reader030/viewer/2022032606/56649eab5503460f94bb1a69/html5/thumbnails/20.jpg)
Effects of Nitrogen Rate on Soil pH
Shelby Co. – Ray Tucker, Jr. Farm
6.6625 6.23756.7625 6.4 6.55 6.5125
6.3
0.31
0
1
2
3
4
5
6
7
8
450 AN 600 AN 750 AN 900 AN 1050 AN 1200 AN 450 AN + 714
14-0-14
LSD
pH
All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate.
Variety = KT200
![Page 21: Fertility Trials Increasing rates of nitrogen fertilizer beyond 150 lb/a can lower soil pH but does not necessary increase yield. Burley tobacco fertilized.](https://reader030.fdocuments.in/reader030/viewer/2022032606/56649eab5503460f94bb1a69/html5/thumbnails/21.jpg)
Effects of Nitrogen Rate on Early Season Burley Vigor
Shelby Co. – Ray Tucker, Jr. Farm
66.25 68.7561.25 66.25
75 75
12.37
71.25
0
20
40
60
80
100
450 AN 600 AN 750 AN 900 AN 1050 AN 1200 AN 450 AN + 714 14-0-14
LSD
%
All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate.
Variety = KT200
![Page 22: Fertility Trials Increasing rates of nitrogen fertilizer beyond 150 lb/a can lower soil pH but does not necessary increase yield. Burley tobacco fertilized.](https://reader030.fdocuments.in/reader030/viewer/2022032606/56649eab5503460f94bb1a69/html5/thumbnails/22.jpg)
Effects of Nitrogen Rate on Burley Yield
Shelby Co. – Ray Tucker, Jr. Farm
288 280 275 271 273 337
565 777502 554 530 493 647
12251247
1420 1405 1544 15971567
314318 330 332 356 377 388
343
2939280927032562252926222391
0
500
1000
1500
2000
2500
3000
3500
450 AN 600 AN 750 AN 900 AN 1050 AN 1200 AN 450 AN + 714 14-0-14
Yie
ld lb
/a
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 14-0-14 significantly improved yield over 450 lb/a alone
Variety = KT200
![Page 23: Fertility Trials Increasing rates of nitrogen fertilizer beyond 150 lb/a can lower soil pH but does not necessary increase yield. Burley tobacco fertilized.](https://reader030.fdocuments.in/reader030/viewer/2022032606/56649eab5503460f94bb1a69/html5/thumbnails/23.jpg)
Effects of Nitrogen Rate on Burley Cured Leaf Chemistry
Shelby Co. – Ray Tucker, Jr. Farm
0
10
20
30
40
50
60
70
450 AN 600 AN 750 AN 900 AN 1050 AN 1200 AN 450 AN + 714 14-0-14
pp
m (
Nit
rate
in p
pt)
NNN Total TSNA Nitrite Nitrate
All plots received 450 lb/a Ammonium Nitrate Broadcast followed by the remainder of the nitrogen shortly after transplanting. AN = Ammonium Nitrate. 14-0-14 is a calcium/potassium nitrate mix
Variety = KT200