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2016 Texas Panhandle Cotton Variety Trials Finalvarietytesting.tamu.edu/files/cotton/files/2016... · location planted on May 6, 2016. The trial was replanted on June 7, 2016. Cool,
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statistical differences. Statistical analyses represent the significant differences between varieties as well as providing information about the strength of the trial and repeatability of the data. Mean values are often numerically different; however, the mean differences may not be large enough to be significant. The least significant difference (LSD) indicates if the reported mean values are statistically different with 95% confidence. The reported LSD level in each table is the minimum difference between two entries where there is statistical significance. Varieties are only significantly different if the differences between varieties are equal to or greater than the reported LSD. For example, the LSD for the final stand counts at Hartley County was 8,959 plants/ac, and the stand counts for Phytogen 333 and Phytogen 243 were 46,174 and 36,010 plants/acre, respectively (Table 3). Because the stand difference between the two varieties (10,164 plants/ac) is greater than the LSD value (8,959 plants/ac), the final plant stand of Phytogen 333 is significantly greater than the final plant stand of Phytogen 243. A CV (coefficient of variation) describes the variability of the data with a target CV value of 15% or less. 2016 Highlights Cool temperatures and late spring precipitation prevailed through the 2016 cotton planting season. As a result, most locations were planted with good soil moisture. While soil temperatures at all locations were above 60°F at planting, cool, wet conditions slowed germination at all locations except the Hartley County location where the sandier soil likely resulted in warmer soil temperatures and more uniform emergence (Table 3). Due to cool, wet planting conditions, there was poor emergence at the Swisher County location planted on May 6, 2016. The trial was replanted on June 7, 2016. Cool, wet conditions coupled with low nighttime temperatures resulted in delayed early-season development as reflected in the growing degree days (GDDs) accumulated (Fig. 1) at all locations. Late July and early August were marked by several weeks with daily highs that reached or exceeded 100°F causing some stress during the peak bloom period. September brought much need precipitation and cooler temperatures; however, this also resulted in secondary regrowth at several locations requiring aggressive plant growth regulator (PGR) management. Lint production was greatest at the Deaf Smith, Hartley and Sherman County locations for all varieties (Fig. 2). Production at Parmer County was affected by Verticillium Wilt that resulted in premature defoliation especially for non-tolerant varieties. At the Parmer County trial, all plots were rated for defolation damage (Table 4), and the greatest yields were achieved with tolerant varieties such as Phytogen 243 and Stoneville 4747GLB2. Verticilium was also found at the Sherman County trial, but not at yield limiting levels that warranted ratings. Lint production at the Swisher County trial was affected by the late planting. Detailed yield and quality results are presented for all locations in Tables 7-16. Varieties ranked by lint yield (lb/ac) and net value (return/ac) are listed in Tables 15 and 16, respectively, to evaluate yield stability. In the 2016 Texas Panhandle Cotton Variety trials, there was not a specific variety that topped yields at all locations; however, Deltapine 1612B2XF, Fibermax 1320GL, NexGen 3405B2XF, and NexGen 3406B2XF all yielded above 1600 lbs/acre lint at the Deaf Smith, Sherman and Hartley County locations where yield was not limited by disease or late planting (Fig. 2).
F
igure 1. Groowing Degrree Day (GDD60) accu
4
umulation ffor all locatiions from pplanting.
Figure 2
2. 2016 Lintt yield (lbs/aac) distribut
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tion across trial sites.
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Table 1. 2016 Variety Characteristics
Variety Maturity Herbicide Package Leaf TypeStorm
Tolerance*
Plant Height
Mic Vert.
Deltapine 1518 B2XF Early Glyphos., Glufos., and Dicamba Light Hair 4 Medium 4.11
Deltapine 1612 B2XF Early Glyphos., Glufos., and Dicamba Light Hair 6 Medium 4.3
Stoneville 4747GLB2 Early-Med Glyphosate and Glufosinate Semi-Smooth 7 Short 4.2 Intermediate
FiberMax 1320GL Very Early Glyphosate and Glufosinate Semi-Smooth 7 Short 4.2
NexGen 3517B2XF Early - Med Glyphos., Glufos., and Dicamba Smooth 6 Med - Tall 4.3 Good
NexGen 3500XF Early - Med Glyphos., Glufos., and Dicamba Smooth 5 Medium 4.1 Tolrant
NexGen 3406B2XF Early - Med Glyphos., Glufos., and Dicamba Semi-Smooth 7 Medium 4.5
NexGen 3405B2XF Early - Med Glyphos., Glufos., and Dicamba Semi-Smooth 5 Medium 4.5
PhytoGen 222WRF Very Early Glyphosate and Glufosinate Smooth Excellent Short 4.1
PhytoGen 243WRF Early Glyphosate and Glufosinate Semi-Smooth Very Good Short-Med 3.7 Excellent
PhytoGen 333WRF Early Glyphosate and Glufosinate Hairy Very Good Med - Tall 4.5
Croplan 3226B2XF Very Early Glyphos., Glufos., and Dicamba Smooth 4 Medium 4.3
FiberMax 2011GT† Early Glyphosate and Glufosinate Semi-Smooth 8 Short 3.9 Very Good
FiberMax 9250GL† Early Glyphosate and Glufosinate Semi-Smooth 7 Short 3.8 Very Good*Storm Tolerance (1-9): 1=Loose Boll, 9=Tight Boll from Company Variety Descriptions.†Variety included at the producer's request.
†Variety included at the producer's request.‡Not enough seed for the second planting
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Table 3. Four-week stand counts by location.
% of Planted Population
(52,000 seeds/ac)
% of Planted Population
(55,000 seeds/ac)
% of Planted Population
(45,000 seeds/ac)
% of Planted Population
(58,000 seeds/ac)
Deltapine 1518 B2XF 31654 ab* 61 41963 ab 76 26499 ed 59 35719 bcd 62Deltapine 1612 B2XF 31073 ab 60 41672 ab 76 29766 bcd 66 48497 a 84Stoneville 4747GLB2 36881 ab 71 42398 ab 77 41019 a 91 40656 abc 70FiberMax 1320GL 25991 b 50 38914 ab 71 13976 ef 31 29863 cd 51NexGen 3517B2XF 32234 ab 62 40366 ab 73 18150 def 40 37462 abcd 65NexGen 3500XF 30202 ab 58 40801 ab 74 26681 ed 59 32670 bcd 56NexGen 3406B2XF 36445 ab 70 41963 ab 76 37208 ab 83 40075 abc 69NexGen 3405B2XF 36445 ab 70 40656 ab 74 23414 cde 52 33977 bcd 59PhytoGen 222WRF 39640 a 76 41963 ab 76 21054 def 47 40656 abc 70PhytoGen 243WRF 31218 ab 60 36010 b 65 24140 def 54 35864 bcd 62PhytoGen 333WRF 41382 a 80 46174 a 84 36300 abc 81 43705 ab 75Croplan 3226B2XF 30202 ab 58 39785 ab 72 14883 f 33 27443 d 47FiberMax 2011GT† --- --- --- --- --- --- 36010 bcd 62FiberMax 9250GL† --- --- --- --- --- --- 35864 bcd 62Test Average 65 75 58 64CV, %OSLLSD†Variety included at the producer's request.*Means followed by the same letter do not significantly differ using LSD (0.05)Stand Counts not taken at Swisher County
For net value/acre, means within a column with the same letter are not significantly different at the 0.05 probability level.CV - coefficient of variation.OSL - observed significance level, or probability of a greater F value.LSD - least significant difference at the 0.05 level, NS - not significant.
Value for lint based on CCC loan value from grab samples and FBRI HVI results. 2016 base loan value for upland cotton is $0.52/pound.Assumes:$2.75/cwt ginning cost.$200/ton for seed.
CV - coefficient of variation.OSL - observed significance level, or probability of a greater F value.LSD - least significant difference at the 0.05 level, NS - not significant
Color grade
Table 6. HVI fiber property results from the 2016 Deaf Smith trial (Frank Bezner Farm, Hereford, Texas).
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Table 7. Harvest results from the 2016 Hartley County Trial (Middlewater Farms, Middlewater, TX, 2016).
Entry Lint Seed Bur cotton Lint Seed Lint loan Lint Seed Total Ginning Seed/techturnout turnout yield yield yield value value value value cost cost
For net value/acre, means within a column with the same letter are not significantly different at the 0.05 probability level.CV - coefficient of variation.OSL - observed significance level, or probability of a greater F value.LSD - least significant difference at the 0.05 level, NS - not significant.
Value for lint based on CCC loan value from grab samples and FBRI HVI results. 2016 base loan value for upland cotton is $0.52/pound.Assumes:$2.75/cwt ginning cost.$200/ton for seed.
CV - coefficient of variation.OSL - observed significance level, or probability of a greater F value.LSD - least significant difference at the 0.05 level, †indicates significance at the 0.10 level, NS - not significant
Color grade
Table 8. HVI fiber property results from the 2016 Hartley County Trial (Middlewater Farms, Middlewater, TX).
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Table 9. Harvest results from the 2016 Parmer County Trial (Williams Family Farm, Farwell, Texas).
Entry Lint Seed Bur cotton Lint Seed Lint loan Lint Seed Total Ginning Seed/techturnout turnout yield yield yield value value value value cost cost
For net value/acre, means within a column with the same letter are not significantly different at the 0.05 probability level.CV - coefficient of variation.OSL - observed significance level, or probability of a greater F value.LSD - least significant difference at the 0.05 level, NS - not significant.
Value for lint based on CCC loan value from grab samples and FBRI HVI results. 2016 base loan value for upland cotton is $0.52/pound.Assumes:$2.75/cwt ginning cost.$200/ton for seed.
CV - coefficient of variation.OSL - observed significance level, or probability of a greater F value.LSD - least significant difference at the 0.05 level, NS - not significant
Color grade
Table 10. HVI fiber property results from the 2016 Parmer County Trial (Williams Family Farm, Farwell, Texas).
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Table 11. Harvest results from the 2016 Sherman County trial (Tommy Cartrite Farm, Sunray, Texas).
Entry Lint Seed Bur cotton Lint Seed Lint loan Lint Seed Total Ginning Seed/techturnout turnout yield yield yield value value value value cost cost
For net value/acre, means within a column with the same letter are not significantly different at the 0.05 probability level.CV - coefficient of variation.OSL - observed significance level, or probability of a greater F value.LSD - least significant difference at the 0.05 level, NS - not significant.
Value for lint based on CCC loan value from grab samples and FBRI HVI results. 2016 base loan value for upland cotton is $0.52/pound.Assumes:$2.75/cwt ginning cost.$200/ton for seed.
CV - coefficient of variation.OSL - observed significance level, or probability of a greater F value.LSD - least significant difference at the 0.05 level.
Color grade
Table 12. HVI fiber property results from the 2016 Sherman County trial (Tommy Cartrite Farm, Sunray, Texas).
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Table 13. Harvest results from the 2016 Swisher County Trial (Jeremy Reed Farm, Kress, TX).
Entry Lint Seed Bur cotton Lint Seed Lint loan Lint Seed Total Ginning Seed/techturnout turnout yield yield yield value value value value cost cost
For net value/acre, means within a column with the same letter are not significantly different at the 0.05 probability level.CV - coefficient of variation.OSL - observed significance level, or probability of a greater F value.LSD - least significant difference at the 0.05 level, NS - not significant.
Value for lint based on CCC loan value from grab samples and FBRI HVI results. 2016 base loan value for upland cotton is $0.52/pound.Assumes:$2.75/cwt ginning cost.$200/ton for seed.
CV - coefficient of variation.OSL - observed significance level, or probability of a greater F value.LSD - least significant difference at the 0.05 level, NS - not significant
Table 14. HVI fiber property results from the 2016 Swisher County Trial (Jeremy Reed Farm, Kress, TX).
Color grade
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Table 15. 2016 Varieties ranked by lint yield (lb/ac).
Table 16. 2016 Varieties ranked by net return ($/ac).