Table 3. Agronomic results for the Roundup Ready vs. Bollgard/Roundup Ready variety trial at Halfway, 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 28.2 1917 539 1028 0.4670 251.72 51.38 303.10 28.76 18.22 256.12
PM 2280BG/RR 28.1 1939 546 1047 0.4333 236.65 52.34 288.99 29.09 41.04 218.87
PM 2326RR 30.8 1926 593 1007 0.4533 269.05 50.33 319.38 28.89 18.38 272.11
PM 2326BG/RR 27.8 2046 569 1050 0.4256 242.58 52.49 295.07 30.69 41.04 223.34
LSD 0.05 1.3 NS NS NS 0.02  NS  NS  NS  NS  — 28.37
CV, % 2.8 4.8 5.0 5.4 3.4 6.6 5.4 6.3 4.8  — 7.3
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 4.  Fiber quality for the Roundup Ready vs. Bollgard/Roundup Ready variety trial at Halfway, TX, 2000.
Variety Color 1 digit Color 2 digit Staple Leaf Micronaire Rd +b Length Strength Uniformity Elongation
PM 2200RR 3.0 2.0 32.8 2.0 3.5 72.6 10.0 1.03 27.3 81.1 6.2
PM 2280BG/RR 3.8 2.0 33.0 2.0 3.3 71.7 9.8 1.03 27.9 81.0 6.3
PM 2326RR 4.0 2.0 32.5 2.0 3.7 70.3 10.0 1.02 27.7 81.2 6.1
PM 2326BG/RR 4.0 2.0 32.0 2.0 3.4 70.5 9.9 1.00 27.9 81.4 7.2
LSD 0.05 0.4  — NS  — 0.2 0.7 NS NS NS NS 0.6
CV, % 6.8  — 2.6  — 4.2 0.6 1.7 2.2 2.2 1.0 5.5
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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