2015 Cotton Variety Trial Results
Over the past few years, N.C. Cooperative Extension has performed large-scale cotton varietal test throughout North Carolina to evaluate early season vigor, first fruit set, plant regulator growth response and yield. These tests require cooperating growers to plant replicated strips of each variety using their equipment. Harvest is completed using grower equipment and field scales provided by NC State University. Lint qualities and actual yield is determined using small-scale ginning equipment.
This year’s testing in Craven County involved cooperator, David Heath. The plot was located within the Fort Barnwell area of NC. The plot was planted in mid-May in an area dominantly mapped as Autryville but with Lynchburg inclusions. At the time of planting, soil moisture and temperature were excellent for rapid emergence. Early season rainfall was adequate through early June. However, from about mid-June through mid-July temperatures were in excess of 90 degrees F with very little rainfall occurring. From mid-July through about early August, favorable scattered showers were frequent and temperature was slightly lower than normal. Late-August through early September weather was adverse. Heavy rainfall events resulting in 4-6” of rainfall were common. In fact, about one week after crop defoliation, the area received approximately 16 inches of rainfall. Warm temperatures followed and some seeds began germinating within the lint reducing lint yield and quality. Fortunately, excessive heat that followed rapidly dried the cotton lint and germinating seeds preventing the need to desiccate the germinating seeds and to allow harvest.
The chart below shows the cotton yield average (lbs./ac) and the percent lint (Lint %) obtained from the cotton field weight. Cotton lint yield is represented by the green bar and Y-Axis on the left and percent lint is represented by the embedded yellow bar with the Y-Axis on the right. Data represents the average based upon three replications of each variety.
No statistical analysis is provided simply because this data reflects only the growing conditions within this location. Similar data will be combined with sixteen other tests conducted across NC to evaluate yield, lint quality and growth habits of these varieties. Results will be presented by NCSU faculty members, Dr. Keith Edmisten or Dr. Guy Collins at N.C. Cooperative Extension meetings conducted in 2016. When available, data will also be posted at this site.
Planting order and abbreviations used are as follows:
Table 1. 2015 Craven County Cotton Variety Trial Abbreviations and Planting Order
|1||PHY 333 WRF||333|
|2||DP 1522 B2XF||1522|
|3||ST 4946 GLB2||4946|
|4||DG 3385 B2XF||3385|
|5||NG 3405 B2XF||3405|
|6||PHY 495 W3RF||495|
|7||DP 1538 B2XF||1538|
|8||ST 4747 GLB2||4747|
|9||NG 3406 B2XF||3406|
|10||PHY 444 WRF||444|
Figure 1. 2015 Cotton Varietal Performance with lint yield presented in lbs/ac and percent lint from field weight.
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