Arizona Upland Cotton Variety
Testing Program, 2004
S. Husman, R. Norton, E. Norton, P. Clay, M. Zerkoune, K. White
University of Arizona Cooperative Extension
Abstract
Each year the University of Arizona conducts variety trials across the state to
evaluate the performance of upland cotton varieties. These tests provide
unbiased data on the performance of varieties when tested side-by-side under
typical production practices. In 2004 we planted a total of 11 trials, two in the
Yuma region (Yuma County), two in the western region (LaPaz and Mohave
counties), four in the central region (Maricopa and Pinal counties), one in the
southern region (Pima county), and two in the eastern region (Graham and
Cochise counties). We tested seven to eight commercially available varieties at
each test site.
Introduction
Each year the University of Arizona conducts variety trials across the state to evaluate the performance of upland
cotton varieties. These trials provide many segments of the cotton industry with unbiased data on yield, fiber
quality, and agronomic performance of commercially available varieties when tested side-by-side under typical
production practices.
The Arizona Upland Cotton Variety Trial is our most intensive testing program. The tests in this program are
conducted at several locations throughout the cotton producing regions of the state, usually on grower’s fields. The
test plots are large-scale “strip plots” which are replicated and randomized using proper field-plot techniques.
Several seed companies enter the varieties they feel have the best chance of producing high yields of good quality
fiber. The results of these trials are the closest possible to obtaining “on-farm” experience with a particular variety.
The purpose of this report is to present the results of the 2004 tests conducted in the following regions: Yuma,
western, central, southern, and eastern, Arizona.
Arizona Cotton Report (P-142) May 2005
129
Materials and Methods
Locations and varieties: Trials were planted at eleven locations in 2004 – two in the Yuma region (Somerton and
Gila Valley), two in the western region (Mohave Valley and Parker), four in the central region (Buckeye, Stanfield,
Maricopa, and Coolidge), one in the southern region (Marana), and two in the eastern region (Thatcher, and Kansas
Settlement). Seven to eight varieties were planted at each site. Varieties included in the 2004 tests were submitted
to the university by the cooperating seed companies that included Deltapine, Stoneville, Buttonwillow Research, and
Salcot Seed Company.
Experimental design and test protocols: Most tests were conducted on grower-cooperator fields. All cultural
practices, including planting date, fertilizer regimes, pest control, irrigation, defoliation, and harvest date were made
by the cooperator. The tests at Maricopa and Marana were located on University of Arizona Experimental stations,
but production practices typical for the area were used in making all cultural decisions. Insect control regimes were
followed for conventional varieties in all tests. Plots were a minimum of 4 rows wide (38 to 40 inch spacing), and
extended the full length of the irrigation run. All treatments (varieties) were arranged in a randomized complete
block design with three or four replications. At least two rows per plot were machine harvested and the seed cotton
from each plot was weighed at the field. Sub-samples of the harvested seed cotton were ginned for turnout and lint
yield was calculated from the seed cotton and turnout data. Lint from the grab samples was sent to the USDA
classing office for HVI fiber quality analysis. Average premium or discount on the lint for each variety was
determined by applying the CCC loan schedule to the HVI data collected from each plot. Price was determined by
using the base value for Arizona (52.0 cents per pound) and adding or subtracting the proper premium or discount to
the base value. Value per acre was determined by multiplying lint yield by the price per pound.
Results
Variety selection within the last five years has become more complicated with the increasing importance of fiber
quality in the market and with the advent of transgenic technology. In our tests, for example, the value of the crop
depended on both lint yield and fiber quality. The highest yielding varieties did not always produce the highest
value per acre (See Tables).
The introduction of high yielding varieties with transgenic traits has been a great benefit to Arizona growers.
However, new conventional varieties are also being developed and released.
Many sources of information on variety performance are publicly available to the industry. The data presented in
this report is a good source of information on the performance of these varieties, and they represent a solid staring
point for determining the actual performance of a given variety on each individual farm. Other sources of
information should be considered when selecting varieties. Seed companies also provide performance data for their
varieties. Other growers in the area may have experience with a particular variety. If possible, more than one year
of data should be considered in evaluating the performance of a particular variety.
Once the decision to try a new variety is made, incorporating that new variety into each cultural program should
proceed in increments. Growers should test it on a limited scale at first to determine how the variety performs on
their own farm and to gain experience on the cultural needs of the variety.
Acknowledgments
The valuable cooperation, land, and resources provided by the following cooperators are greatly appreciated: Jake
Dunn, Bruce Heiden, Layton Farms, Paul Ollerton, John Peach, Quail Mesa Farms, Milton Schmitt, Lee Smith,
Wakimoto Farms, and the UofA Experiment stations at Maricopa and Marana. The support and cooperation
provided by the participating seed companies – Delta and Pine Land Co., Stoneville, Buttonwillow Research, and
Salcot Seed Company.
Arizona Cotton Report (P-142) May 2005
130
University of Arizona
Cooperative Extension
2004 Upland Cotton Variety Trial Results
Mohave, AZ
Planting Date
Total Number of Irrigations
Company
Variety
1 APR 2004
9 Irrigations
Lint Yield
Final Irrigation Date
Total N Applied
Percent
Lint
Micronaire
(lbs/Acre)
Delta and Pine
Delta and Pine
Stoneville
Stoneville
Delta and Pine
Salcot
Stoneville
LSD0.052
OSL3
CV (%)4
DP 449BR
DP 448B
ST 5599BR
ST 5303R
DP 432R
SCX-7
ST 5242BR
1 SEPT 2004
245 lbs. N
Fiber
Length
(100ths)
Harvest Date
General Soil Texture
Fiber Quality
Staple
Fiber
Length
Strength
(32nds)
(g/tex)
Uniformity
Index
1110 a¹
1037 a
1019 a
1005 ab
909 bc
877 cd
800 d
35.3
33.8
34.5
35.5
36.8
34.8
34.3
5.1
5.0
5.1
5.1
5.2
4.8
4.6
1.07
1.07
1.05
1.06
1.06
1.05
1.02
34.5 a
34.3 a
33.5 ab
34.3 a
34.0 a
33.5 ab
32.5 b
30.0 ab
28.5 c
28.7 c
31.0 a
29.2 bc
30.3 ab
26.7 d
80.3 b
79.5 b
80.5 b
82.8 a
82.0 a
79.5 b
80.5 b
108
0.0002
7.5
NS
0.2348
4.6
NS
0.0791
5.1
NS
0.0576
1.8
1.12
0.0229
2.2
1.3
0.0001
2.9
1.3
0.0003
1.1
14 OCT 2004
Silty Loam
Premium/
Discount5
(points)
($/acre)
121
-24
-245
-8
-370
-126
-176
591
536
506
522
439
446
402
Value6
1
Means followed by the same letter are not significantly different according to a Fisher’s LSD means separation test.
LSD: Least Significant Difference.
OSL: Observed Significance Level.
4
CV: Coefficient of Variation.
5
Average premium or discount applied to the lint based on CCC loan schedule.
6
Value of lint per acre based on CCC loan schedule of discounts and premiums and assuming a base value of 52.00 cents per pound.
2
3
Arizona Cotton Report (P-142) May 2005
131
University of Arizona
Cooperative Extension
2004 Upland Cotton Variety Trial Results
Parker, AZ
Planting Date
Total Number of Irrigations
Company
Variety
Delta and Pine
Stoneville
Stoneville
Delta and Pine
Delta and Pine
Stoneville
Salcot
LSD0.052
OSL3
CV (%)4
DP 449BR
ST 5303R
ST 5599BR
DP 448B
DP 432R
ST 5242BR
SCX-7
1 MAR 2004
9 Irrigations
Lint Yield
Final Irrigation Date
Total N Applied
Percent
Lint
Micronaire
30.3
29.5
29.3
28.5
31.0
29.8
28.8
NS
0.3385
5.24
4.1 a
4.1 a
4.1 a
3.8 b
4.2 a
4.1 a
3.7 b
0.2
0.0033
3.9
(lbs/Acre)
1645 a
1599 a
1553 ab
1527 ab
1476 ab
1363 b
1040 c
222
0.0004
10.03
Harvest Date
General Soil Texture
200 lbs. N
Fiber
Length
(100ths)
1.13 a
1.10 c
1.06 d
1.11 abc
1.11 bc
1.08 d
1.12 ab
0.02
0.0001
1.3
Fiber Quality
Staple
Fiber
Length Strength
(32nds)
(g/tex)
36.3 a
35.3 bc
34.3 d
35.8 ab
35.5 b
34.5 cd
36.0 ab
0.8
0.0004
1.5
31.8 a
31.9 a
26.4 d
29.2 bc
28.9 bc
27.7 cd
30.0 b
1.8
0.0001
4.0
22 DEC 2004
Silty Loam
Uniformity
Index
Premium/
Discount5
(points)
($/acre)
80.3 b
81.8 a
78.0 d
79.8 bc
82.0 a
81.5 a
79.0 cd
1.1
0.0001
0.9
490
53
-186
248
-313
140
-13
936
840
781
834
722
728
542
Value6
1
Means followed by the same letter are not significantly different according to a Fisher’s LSD means separation test.
LSD: Least Significant Difference.
OSL: Observed Significance Level.
4
CV: Coefficient of Variation.
5
Average premium or discount applied to the lint based on CCC loan schedule.
6
Value of lint per acre based on CCC loan schedule of discounts and premiums and assuming a base value of 52.00 cents per pound.
2
3
Arizona Cotton Report (P-142) May 2005
132
University of Arizona
Cooperative Extension
2004 Upland Cotton Variety Trial Results
Gila Valley, AZ
Planting Date
Total Number of Irrigations
Company
Variety
30 MAR 2004
6 Irrigations
Lint Yield
Final Irrigation Date
Total N Applied
Percent
Lint
Micronaire
(lbs/Acre)
Stoneville
Delta and Pine
Delta and Pine
Delta and Pine
Stoneville
Salcot
Buttonwillow
Stoneville
LSD0.052
OSL3
CV (%)4
ST5599BR
DP 432R
DP 444BR
DP 449BR
ST 5303R
SCX-7
BR 303
ST 5242BR
1639 a¹
1587 ab
1574 ab
1560 ab
1510 bc
1466 bc
1410 cd
1311 d
127
0.0014
4.8
36.6 bc
35.8 bcd
39.0 a
37.0 b
35.1 cd
35.7 bcd
33.1 e
34.7 de
1.7
0.0002
2.7
1
4.5 b
4.3 bc
4.10 d
4.7 a
4.7 a
4.2 cd
4.4 b
4.3 bc
0.2
0.0001
2.2
20 JUL 2004
70 lbs. N
Fiber
Length
(100ths)
1.08
1.06
1.07
1.10
1.09
1.10
1.10
1.07
NS
0.7264
3.4
Harvest Date
General Soil Texture
Fiber Quality
Staple
Fiber
Length Strength
(32nds)
(g/tex)
34.7
34.0
34.3
35.3
35.0
35.7
35.3
34.3
NS
0.6835
3.6
27.4 bc
27.2 bc
25.4 c
28.8 ab
29.7 a
30.7 a
29.8 a
26.2 c
2.0
0.0006
4.1
Uniformity
Index
78.3
78.7
80.0
79.3
80.0
79.0
79.3
79.0
NS
0.4500
1.3
27 SEP 2004
Sandy
Premium/
Discount5
(points)
($/acre)
302
175
265
410
370
405
265
100
902
853
860
875
841
822
769
696
Value6
1
Means followed by the same letter are not significantly different according to a Fisher’s LSD means separation test.
LSD: Least Significant Difference.
3
OSL: Observed Significance Level.
4
CV: Coefficient of Variation.
5
Average premium or discount applied to the lint based on CCC loan schedule.
6
Value of lint per acre based on CCC loan schedule of discounts and premiums and assuming a base value of 52.00 cents per pound.
2
Arizona Cotton Report (P-142) May 2005
133
University of Arizona
Cooperative Extension
2004 Upland Cotton Variety Trial Results
Somerton, AZ
Planting Date
Total Number of Irrigations
Company
Variety
8 MAR 2004
6 Irrigations
Lint Yield
Final Irrigation Date
Total N Applied
Percent
Lint
Micronaire
(lbs/Acre)
Delta and Pine
Delta and Pine
Delta and Pine
Stoneville
Stoneville
Stoneville
Salcot
Buttonwillow
LSD0.052
OSL3
CV (%)4
DP 432R
DP444BR
DP449BR
ST 5599BR
ST 5242BR
ST 5303R
SCX-7
BR 303
1
1923 a
1805 ab
1783 ab
1716 bc
1663 bc
1580 c
1309 d
1122 e
152
0.0001
5.4
35.4 a
35.7 a
36.0 a
33.5 c
35.8 a
36.0 a
35.9 b
31.2 c
1.2
0.0001
2.0
4.8 ab
5.0 a
4.5 c
5.0 a
4.4 c
4.4 c
4.6 bc
4.6 bc
0.2
0.0002
2.9
27 JUL 2004
48 lbs. N
Fiber
Length
(100ths)
1.03 b
1.06 b
1.06 b
1.05 b
1.03 b
1.04 b
1.06 b
1.15 a
0.03
0.0001
1.9
Harvest Date
General Soil Texture
Fiber Quality
Staple
Fiber
Length
Strength
(32nds)
(g/tex)
33.0 c
34.0 bc
34.0 bc
33.7 bc
33.0 c
33.3 bc
34.3 b
37.0 a
1.1
0.0001
1.8
26.1 d
28.6 c
29.0 bc
27.3 cd
26.1 d
26.4 d
30.8 ab
31.4 a
2.0
0.0001
4.0
Uniformity
Index
78.3 b
80.3 a
79.0
80.7
79.3
79.0
79.0
79.7
NS
0.3056
1.4
1 SEP 2004
Clay Loam
Premium/
Discount5
(points)
($/acre)
-150
-67
163
-160
-128
-27
293
340
971
929
957
865
844
819
719
621
Value6
1
Means followed by the same letter are not significantly different according to a Fisher’s LSD means separation test.
LSD: Least Significant Difference.
3
OSL: Observed Significance Level.
4
CV: Coefficient of Variation.
5
Average premium or discount applied to the lint based on CCC loan schedule.
6
Value of lint per acre based on CCC loan schedule of discounts and premiums and assuming a base value of 52.00 cents per pound.
2
Arizona Cotton Report (P-142) May 2005
134
University of Arizona
Cooperative Extension
2004 Upland Cotton Variety Trial Results
Buckeye, AZ
Planting Date
Total Number of Irrigations
Company
Variety
5 APR 2004
Final Irrigation Date
20 Irrigations
Lint Yield
Total N Applied
Percent
Lint
Micronaire
(lbs/Acre)
Delta and Pine
Delta and Pine
Delta and Pine
Buttonwillow
Stoneville
Stoneville
Salcot
Stoneville
LSD0.052
OSL3
CV (%)4
DP 555BR
DP 432R
DP 449BR
BR 303
ST 5599BR
ST 4646B2R
SCX-7
ST 5242BR
22 SEP 2004
10 tons manure + 50
lbs. UN32
Fiber
Length
(100ths)
Fiber Quality
Staple
Fiber
Length Strength
(32nds)
(g/tex)
Harvest Date
General Soil Texture
Uniformity
Index
1849 a¹
1630 b
1482 c
1457 c
1433 c
1397 c
1383 c
1153 d
39.4 a
35.7 b
33.9 b
33.7 b
35.6 b
34.2 b
33.6 b
35.3 b
5.1 a
4.8 bc
4.9 ab
4.6 de
4.4 e
4.8 bcd
4.9 ab
4.6 cde
1.04 cd
1.05 bc
1.05 bc
1.14 a
1.01 d
1.02 cd
1.08 b
1.02 cd
33.3 cde
33.5 bcd
33.8 bc
36.5 a
32.3 e
32.5 de
34.5 b
32.5 de
24.8 cd
26.5 cd
27.2 bc
29.3 ab
24.4 d
24.5 d
30.9 a
24.6 cd
78.3 d
80.5 ab
79.8 bc
81.0 a
78.3 d
79.0 cd
80.0 abc
79.8 bc
134
0.0001
6.17
0.03
0.0158
6.03
0.2
0.0003
3.07
0.03
0.0001
2.10
1.1
0.0001
2.2
2.6
0.0001
6.6
1.2
0.0012
1.03
29 NOV 2004
Sandy loam
Premium/
Discount5
(points)
($/acre)
-623
-95
-286
23
-448
-381
34
-344
868
833
725
760
681
673
722
560
Value6
1
Means followed by the same letter are not significantly different according to a Fisher’s LSD means separation test.
LSD: Least Significant Difference.
OSL: Observed Significance Level.
4
CV: Coefficient of Variation.
5
Average premium or discount applied to the lint based on CCC loan schedule.
6
Value of lint per acre based on CCC loan schedule of discounts and premiums and assuming a base value of 52.00 cents per pound.
2
3
Arizona Cotton Report (P-142) May 2005
135
University of Arizona
Cooperative Extension
2004 Upland Cotton Variety Trial Results
Stanfield, AZ
Planting Date
Total Number of Irrigations
Company
Variety
3 MAY 2004
9 Irrigations
Lint Yield
Final Irrigation Date
Total N Applied
Percent
Lint
Micronaire
(lbs/Acre)
Stoneville
Delta and Pine
Delta and Pine
Stoneville
Delta and Pine
Buttonwillow
Salcot
Stoneville
LSD0.052
OSL3
CV (%)4
ST 5599BR
DP 555BR
DP 449BR
ST 4646B2R
DP 432R
BR 303
SCX-7
ST 5242BR
8 SEP 2004
160 lbs. N
Fiber
Length
(100ths)
Harvest Date
General Soil Texture
Fiber Quality
Staple
Fiber
Length Strength
(32nds)
(g/tex)
Uniformity
Index
2191 a¹
2160 ab
2036 b
1901 c
1745 d
1684 de
1587 ef
1517 f
38.0
39.2
35.8
35.6
35.5
35.2
34.8
32.4
5.3 ab
4.6 f
5.3 abc
5.4 a
5.1 bcd
5.0 cd
4.7 ef
4.9 de
1.11 b
1.14 ab
1.12 ab
1.13 ab
1.18 a
1.18 a
1.18 a
1.08 b
35.3 b
36.7 ab
36.0 ab
36.7 ab
38.0 a
38.0 a
38.0 a
34.7 b
31.7 bcd
30.8 cde
32.5 abc
30.4 de
32.0 abcd
32.8 ab
33.6 a
29.3 e
82.3
82.0
83.0
83.3
83.3
82.3
83.0
82.3
129
0.0001
4.0
----
0.3
0.0002
3.0
0.06
0.0257
3.2
2.2
0.0352
3.5
1.8
0.0039
3.3
NS
0.3563
1.0
12 NOV 2004
Sandy loam
Premium/
Discount5
(points)
($/acre)
-75
323
-67
-428
-103
-87
288
325
1123
1193
1044
908
893
860
871
839
Value6
1
Means followed by the same letter are not significantly different according to a Fisher’s LSD means separation test.
LSD: Least Significant Difference.
OSL: Observed Significance Level.
4
CV: Coefficient of Variation.
5
Average premium or discount applied to the lint based on CCC loan schedule.
6
Value of lint per acre based on CCC loan schedule of discounts and premiums and assuming a base value of 52.00 cents per pound.
2
3
Arizona Cotton Report (P-142) May 2005
136
University of Arizona
Cooperative Extension
2004 Upland Cotton Variety Trial Results
Maricopa, AZ
Planting Date
Total Number of Irrigations
Company
Variety
Stoneville
Stoneville
Delta and Pine
Delta and Pine
Stoneville
Buttonwilloe
Salcot
Delta and Pine
LSD0.052
OSL3
CV (%)4
ST 5599BR
ST 4646B2R
DP 449BR
DP 432R
ST 5242BR
BR 303
SCX-7
DP 555BR
15 APR 2004
9 Irrigations
Lint Yield
Final Irrigation Date
Total N Applied
Percent
Lint
Micronaire
35.7
35.6
35.9
37.6
34.2
32.1
37.3
41.4
----
4.7 abc
4.8 ab
4.6 c
4.9 a
4.7 abc
4.6 bc
4.3 d
4.3 d
0.2
0.0006
2.98
(lbs/Acre)
1373 a¹
1216 b
1190 b
1079 bc
1026 cd
1001 cd
956 cd
908 d
140
0.0001
8.7
3 SEP 2004
200 lbs. N
Fiber
Length
(100ths)
1.15 c
1.17 b
1.17 bc
1.15 c
1.12 d
1.26 a
1.16 bc
1.15 c
0.02
0.0001
.94
Harvest Date
General Soil Texture
Fiber Quality
Staple
Fiber
Length Strength
(32nds)
(g/tex)
37.0 c
37.7 b
37.0 c
37.0 c
36.0 d
40.0 a
37.3 bc
37.0 c
0.54
0.0001
0.83
30.4 bc
29.0 de
31.2 b
29.6 cd
28.3 e
30.9 b
32.1 a
30.1 c
0.82
0.0001
1.5
1 NOV 2004
loam
Uniformity
Index
Premium/
Discount5
(points)
($/acre)
82.0 bc
83.3 a
83.7 a
83.7 a
83.0 ab
83.7 a
81.3 c
82.0 bc
1.17
0.0027
0.81
120
-42
295
-12
265
42
443
415
738
610
642
556
547
499
511
534
Value6
1
Means followed by the same letter are not significantly different according to a Fisher’s LSD means separation test.
LSD: Least Significant Difference.
OSL: Observed Significance Level.
4
CV: Coefficient of Variation.
5
Average premium or discount applied to the lint based on CCC loan schedule.
6
Value of lint per acre based on CCC loan schedule of discounts and premiums and assuming a base value of 52.00 cents per pound.
2
3
Arizona Cotton Report (P-142) May 2005
137
University of Arizona
Cooperative Extension
2004 Upland Cotton Variety Trial Results
Coolidge, AZ
Planting Date
Total Number of Irrigations
Company
Variety
Stoneville
Delta and Pine
Stoneville
Stoneville
Delta and Pine
Buttonwillow
Delta and Pine
Salcot
LSD0.052
OSL3
CV (%)4
ST 4646B2R
DP 432R
ST 5599BR
ST 5242BR
DP 449BR
BR 303
DP 555BR
SCX-7
13 APR 2004
10 Irrigations
Lint Yield
Final Irrigation Date
Total N Applied
Percent
Lint
Micronaire
37.5 ab
38.2 ab
37.7 ab
38.5 a
36.6 b
34.0 c
38.9 a
34.8 c
0.02
0.0002
2.6
5.0 bc
5.3 a
5.2 ab
4.8 c
4.9 c
4.8 c
4.9 c
4.2 d
0.2
0.0001
2.7
(lbs/Acre)
1696 a¹
1485 ab
1478 ab
1472 ab
1470 ab
1430 b
1241 bc
1179 c
250
0.0170
10.0
20 SEP 2004
280 lbs. N
Fiber
Length
(100ths)
1.10 c
1.09 cd
1.07 cd
1.06 d
1.13 b
1.19 a
1.07 cd
1.16 ab
0.03
0.0001
1.7
Harvest Date
General Soil Texture
Fiber Quality
Staple
Fiber
Length Strength
(32nds)
(g/tex)
35.3 c
35.0 cd
34.3 cd
34.0 d
36.7 b
38.0 a
34.3 cd
37.0 ab
1.1
0.0001
1.7
28.6 cd
28.9 cd
28.7 cd
26.6 e
29.9 c
31.6 b
28.1 d
33.2 a
1.3
0.0001
2.6
19 OCT 2004
Loam
Uniformity
Index
Premium/
Discount5
(points)
($/acre)
81.0 bcd
82.7 a
80.7 cd
81.0 bcd
81.7 abc
82.3 ab
80.0 d
82.0 abc
1.4
0.0117
0.95
167
-90
-107
230
272
480
165
555
912
758
753
799
804
813
666
678
Value6
1
Means followed by the same letter are not significantly different according to a Fisher’s LSD means separation test.
LSD: Least Significant Difference.
3
OSL: Observed Significance Level.
4
CV: Coefficient of Variation.
5
Average premium or discount applied to the lint based on CCC loan schedule.
6
Value of lint per acre based on CCC loan schedule of discounts and premiums and assuming a base value of 52.00 cents per pound.
2
Arizona Cotton Report (P-142) May 2005
138
University of Arizona
Cooperative Extension
2004 Upland Cotton Variety Trial Results
Marana, AZ
Planting Date
Total Number of Irrigations
Company
Variety
Stoneville
Stoneville
Delta and Pine
Salcot
Delta and Pine
Delta and Pine
Stoneville
LSD0.052
OSL3
CV (%)4
ST 4646B2R
ST 5242BR
DP 555BR
SCX-7
DP 432R
DP 449BR
ST 5599BR
16 APR 2004
7 Irrigations
Lint Yield
Final Irrigation Date
Total N Applied
Percent
Lint
Micronaire
38.1
38.4
38.9
37.2
37.7
38.2
36.9
NS
0.9081
5.7
4.9
4.6
5.1
4.9
4.8
4.9
5.0
NS
0.3746
5.0
(lbs/Acre)
1532
1437
1422
1414
1404
1375
1352
NS
0.7010
8.8
30 AUG 2004
111 lbs. N
Harvest Date
General Soil Texture
Fiber Quality
Fiber
Staple
Fiber
Length
Length Strength
(100ths)
(32nds)
(g/tex)
1.11 b¹
1.15 a
1.10 bc
1.07 c
1.09 bc
1.11 b
1.10 bc
0.04
0.0190
2.0
36.0 ab
37.0 a
35.3 bc
34.3 c
35.0 bc
35.7 abc
35.3 bc
1.4
0.0343
2.2
29.4
31.4
28.9
27.6
29.9
29.2
29.3
NS
0.4724
6.8
26 OCT 2004
Clay Loam
Uniformity
Index
Premium/
Discount5
(points)
($/acre)
82.3
82.0
82.3
81.7
80.7
81.3
82.0
NS
0.5461
1.4
80
487
25
18
313
-18
43
807
817
746
738
774
712
711
Value6
1
Means followed by the same letter are not significantly different according to a Fisher’s LSD means separation test.
LSD: Least Significant Difference.
3
OSL: Observed Significance Level.
4
CV: Coefficient of Variation.
5
Average premium or discount applied to the lint based on CCC loan schedule.
6
Value of lint per acre based on CCC loan schedule of discounts and premiums and assuming a base value of 52.00 cents per pound.
2
Arizona Cotton Report (P-142) May 2005
139
University of Arizona
Cooperative Extension
2004 Upland Cotton Variety Trial Results
Thatcher, AZ
Planting Date
Total Number of Irrigations
Company
Variety
Delta and Pine
Stoneville
Delta and Pine
Stoneville
Delta and Pine
Stoneville
Salcot
LSD0.052
OSL3
CV (%)4
DP 655BR
ST 5242BR
DP 488BR
ST 5599BR
DP 555BR
ST 4646B2R
SCX-7
17 APR 2004
7 Irrigations
Lint Yield
Final Irrigation Date
Total N Applied
Percent
Lint
Micronaire
35.8 c
39.7 a
36.8 bc
37.6 bc
38.6 ab
35.6 c
30.3 d
0.02
0.0001
4.1
3.7
3.8
3.69
3.7
3.4
3.5
3.6
NS
0.3888
6.2
(lbs/Acre)
1407 a¹
1301 b
1258 bc
1241 bc
1218 c
1087 d
1068 d
80.9
0.001
4.5
17 SEP 2004
70 lbs N
Fiber
Length
(100ths)
1.12 bc
1.10 bcd
1.18 a
1.08 d
1.13 b
1.09 cd
1.19 a
0.03
0.0001
2.1
Harvest Date
General Soil Texture
Fiber Quality
Staple
Fiber
Length Strength
(32nds)
(g/tex)
36.0 b
35.3 bc
37.8 a
34.8 c
36.3 b
35.3 bc
38.0 a
1.15
0.0001
2.2
31.4
28.9
30.9
29.7
31.5
29.6
31.7
NS
0.0787
4.6
5 NOV 2004
Clay Loam
Uniformity
Index
Premium/
Discount5
(points)
($/acre)
81.0
81.8
82.0
81.0
80.8
80.3
81.8
NS
0.0626
1.0
339
364
308
124
320
43
305
779
723
693
662
673
570
587
Value6
1
Means followed by the same letter are not significantly different according to a Fisher’s LSD means separation test.
LSD: Least Significant Difference.
3
OSL: Observed Significance Level.
4
CV: Coefficient of Variation.
5
Average premium or discount applied to the lint based on CCC loan schedule.
6
Value of lint per acre based on CCC loan schedule of discounts and premiums and assuming a base value of 52.00 cents per pound.
2
Arizona Cotton Report (P-142) May 2005
140
University of Arizona
Cooperative Extension
2004 Upland Cotton Variety Trial Results
Kansas Settlement, AZ
Planting Date
Total Number of Irrigations
Company
Variety
Stoneville
Stoneville
Stoneville
Delta and Pine
Delta and Pine
Delta and Pine
Salcot
LSD0.052
OSL3
CV (%)4
ST 5242BR
ST 5599BR
ST 4646B2R
DP 432R
DP 449BR
DP 444BR
SCX-7
13 APR 2004
Center Pivot
Lint Yield
Final Irrigation Date
Total N Applied
Percent
Lint
Micronaire
43.1 a¹
37.6 b
36.4 bc
37.1 b
34.9 bc
33.1 c
35.9 bc
0.04
0.0008
6.5
3.8 b
3.5 c
3.9 ab
4.1 a
3.1 d
4.0 ab
3.4 cd
0.3
0.0001
5.3
(lbs/Acre)
1200
1091
1067
1059
1051
968
905
NS
0.1141
11.7
10 SEP 2004
104 lbs. N
Harvest Date
General Soil Texture
Fiber Quality
Fiber
Staple
Fiber
Length
Length Strength
(100ths)
(32nds)
(g/tex)
1.03 c
1.10 ab
1.10 ab
1.07 b
1.12 a
1.12 a
1.11 a
0.03
0.0001
1.7
33.0 c
35.8 a
35.0 ab
34.8 b
35.8 a
35.8 a
35.7 ab
0.9
0.0001
1.7
25.0 d
29.7 ab
28.0 c
28.1 c
30.3 a
29.4 b
29.3 b
0.7
0.0001
1.7
20 OCT 2004
Sandy Loam
Uniformity
Index
Premium/
Discount5
(points)
($/acre)
80.8
81.0
81.0
82.0
81.8
82.0
81.0
NS
0.4032
1.2
-155
379
295
378
109
425
255
605
608
586
590
558
543
495
Value6
1
Means followed by the same letter are not significantly different according to a Fisher’s LSD means separation test.
LSD: Least Significant Difference.
3
OSL: Observed Significance Level.
4
CV: Coefficient of Variation.
5
Average premium or discount applied to the lint based on CCC loan schedule.
6
Value of lint per acre based on CCC loan schedule of discounts and premiums and assuming a base value of 52.00 cents per pound.
2
Arizona Cotton Report (P-142) May 2005
141