Download - Fertilizing Tobacco to Meet Today’s Needs
Fertilizing Tobacco to Meet
Today’s Needs
Cover Crops
A Disk or a Compaction Tool?
Compaction Created with a Disk
Soil Penetration Resistance
Eden Shale Farm 1985
200210220230240250260270280290
2 4 6 8 10 12
lbs/
sq in
ch
Compaction Noncompaction
No Deep Roots for Dry Periods
Fertilization
A Good Burley Crop 3000 lb/aRemoves
200 lbs of N200 lbs of N
35 lbs of P2O5
240 lbs of K20
N Deficiency or Drought?
Irrigation Started Late
Recommended N Rates
Soil Level of N Lbs. N/ac
High 150-200
Medium 200-250
Low 250-300
Effects of Nitrogen Rates on Burley Tobacco at Spindletop Farm
2000
2500
3000
3500
4000
0 50 100 150 200 250 300 350 400
N rate (lb/a)
Yie
ld lb
/a
1991
1992
Equivalent Acidity or Basicity of Fertilizers
-140 -90 -40 10
Ammonium Sulfate
Urea
Ammonium Nitrate
Potassium Nitrate
Soda-Potash
Sodium Nitrate
lbs of Calcium Carbonate per 100 lbs product
Nitrogen Sources as a Sidedressing on Burley Tobacco
Laurel Co. - Dean Cornett Farm
590 621 591 557
1473 1425 1399 1492
806 667541
783
2869 2713 2531 2832
0
500
1000
1500
2000
2500
3000
450AN+(625SN) 450AN+(300AN) 750AN 2000{5-10-15} +(300AN+300AN)
Yie
ld l
b/a
BROADCAST + (SIDEDRESS) LSD 0.05 = 92 429 420 808
Cost & Returns From DifferentSources of NitrogenLaurel Co. - Dean Cornett Farm
0500
10001500200025003000350040004500500055006000$
FERT. COST 159.68 84.38 84.38 246.5
RETURNS - FERT. COST 5348.8 5124.58 4775.14 5190.94
450AN+(625SN) 450AN+(300AN) 750AN2000{5-10-15}
+(300AN+300AN)
Effects of Nitrogen Application on Soil pH
5
5.2
5.4
5.6
5.8
6
6.2
6.4
1-M
ay
8-M
ay
15
-Ma
y
22
-Ma
y
29
-Ma
y
5-J
un
12
-Ju
n
19
-Ju
n
26
-Ju
n
3-J
ul
10
-Ju
l
17
-Ju
l
24
-Ju
l
31
-Ju
l
7-A
ug
14
-Au
g
21
-Au
g
Soil pH0 N 240 lbs N
All plots received 150 lbs P2O5 and 250 lbs K20
Effect of Liming an Acid Soil Prior to Use of Urea and Sodium Nitrate Sources of Nitrogen
2612
2765 2772
2358
26472750
2000
2200
2400
2600
2800
3000
0 5 7.5
Tons of Lime/A
Yie
ld l
b/a
Sodium Nitrate Urea
Both N sources applied at 225 lb N/A pre-plant.
Effect of Liming an Acid Soil Prior to Use of Urea and Sodium Nitrate Sources of Nitrogen
5.3
5.8
6.3
4.7
5.76
4
4.5
5
5.5
6
6.5
7
0 5 7.5
Tons of Lime/A
So
il p
H
Sodium Nitrate Urea
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.
Manganese Toxicity
Agricultural Lime
Rank Green Tobacco at Harvest
Fat Stem Cause Poor Curing
Foliar Feeding TrialCLAY CO. - BOBBY REID FARM
394 657 629 663 639 570 500 506 580
1149
1384 1498 1350 1213 1312 1256 1383 1204
700
995 956861
784 859784
850748
3036 3083 2874 2636 2741 2540 2739 25322243
0
500
1000
1500
2000
2500
3000
3500
100 CK 100 NL 100 GG 200 CK 200 NL 200 GG 300 CK 300 NL 300 GG
Yie
ld lb
/a
CK=CHECK, NL=NUTRA LEAF, GG=GRO-GREEN FOLIAR FERTILIZER APPLIED 2 LB ACTUAL N/ ACRE AT 4 AND 10 WEEKS LSD 0.05 = 144 276 171 395
Phosphorus Deficiency
Potassium Deficiency
Potassium-Nitrogen Interactions
1400
1500
1600
1700
1800
1900
2000
2100
2200
100 250 400
N applied (lb/a)
Yield lb/a0 K 100 K
Evanylo & Sims (1987)
Boron Deficiency
Calcium Deficiency
Tobacco Information Online
www.uky.edu/Ag/Tobacco/
www.uky.edu/Ag/TobaccoProd/