Table 5. Agronomic results for the Roundup Ready vs. Bollgard/Roundup Ready variety trial at Denver City, TX, 2000.

Variety Lint Bur cotton Lint Seed  Lint loan  Lint  Seed  Total  Ginning  Seed/tech fee  Net
turnout yield yield yield  value  value  value  value  cost  cost  value
% lb/acre lb/acre lb/acre  $/lb  $/acre  $/acre  $/acre  $/acre  $/acre  $/acre
PM 2200RR 28.4 1900 539 1017 0.4870 262.42 50.87 313.29 28.49 20.50 264.30
PM 2280BG/RR 28.9 1989 573 1079 0.5290 303.36 53.94 357.30 29.83 46.17 281.30
PM 2326RR 28.6 1973 564 977 0.5198 293.07 48.84 341.91 29.59 20.68 291.64
PM 2326BG/RR 28.9 2113 613 1106 0.4788 292.67 55.31 347.98 31.69 46.17 270.12
ST X9903R 31.9 1841 587 894 0.5128 301.08 44.71 345.79 27.62 32.67 285.50
ST 4892BR 31.3 1986 621 966 0.5044 313.29 48.28 361.57 29.79 55.78 276.00
LSD 0.05 1.7 142 48 99 0.02 27.68 4.96 NS 2.12  —  NS
CV, % 3.7 4.8 5.5 6.5 3.2 6.2 6.5 6.1 4.8  — 7.2
Means within a column with the same letter are not significantly different at the 0.05 probability level.
LSD – least significant difference, NS – not significant.
Note: some columns may not add up due to rounding error.
Assumes:
$1.50/cwt ginning cost (bagging, ties, and checkoff not included)
$100/ton for seed.
Value for lint based on CCC loan value calculated from HVI data from ITC classing results.
Table 6.  Fiber quality for the Roundup Ready vs. Bollgard/Roundup Ready variety trial at Denver City, TX, 2000.
Variety Color 1 digit Color 2 digit Staple Leaf Micronaire Rd +b Length Strength Uniformity Elongation
PM 2200RR 3.0 1.0 33.3 3.0 3.5 75.6 9.1 1.04 27.7 81.2 5.9
PM 2280BG/RR 3.5 1.0 34.5 3.0 3.5 74.1 8.7 1.07 29.3 81.0 5.8
PM 2326RR 4.0 1.0 34.0 3.0 3.9 72.9 8.7 1.05 27.9 82.6 5.8
PM 2326BG/RR 3.3 1.0 32.5 3.0 3.8 74.6 8.9 1.01 28.1 81.8 6.5
ST X9903R 3.3 1.5 34.0 3.0 3.7 73.4 9.4 1.06 26.5 80.7 5.8
ST 4892BR 3.3 1.5 34.0 3.0 3.8 73.1 9.3 1.06 27.2 81.9 5.7
LSD 0.05 0.5 0.4 0.7  — 0.3 0.6 0.3 0.02 1.1 NS 0.4
CV, % 9.2 25.6 1.4  — 4.6 0.6 2.4 1.2 2.7 1.1 4.5
Means within a column with the same letter are not significantly different at the 0.05 probability level.
LSD – least significant difference, NS – not significant.

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