What happens on the farm at cotton harvest time doesn’t stay on the farm–just ask your local cotton gin. Paying close attention to several specific elements can help improve ginning efficiency, lint quality, turnout and overall crop value.
Here’s what you need to know about managing five key factors of your harvest process, including crop moisture, defoliation timing, weather exposure, moisture handling and field conditions.
Factor 1: Cotton defoliation timing and crop maturity assessment
Before cotton defoliation, use methods such as Nodes Above Cracked Boll (NACB) to test for harvest-readiness. Aim for four NACB or fewer. Also make sure 60% to 75% of bolls are open.¹
Another best practice is the knife test. Use a sharp knife to cut the uppermost boll that will contribute to your yield. Look for the cotton to string out. Verify seeds are fully developed.
Always implement these practices to avoid the risks of defoliating at the wrong time. Defoliate too early and you’ll reduce your yields. Defoliate too late and you’ll risk boll rot.
Factor 2: Moisture content management during cotton harvest time
Aim for between 6% and 8% moisture content in cotton to ensure it stores safely and to maintain fiber quality.² Excessive moisture can cause significant problems including:
- Reduced lint turnout during ginning
- Heating within modules
- Fiber degradation
- Seed damage
Not only that, but wet cotton can cause problems with ginning equipment. For instance, wads can clog, damage or even stop machinery.
At the same time, your cotton needs some moisture or other problems can arise. Cotton that’s excessively dry can cling to surfaces via static electricity, shutting down ginning equipment or causing lots of wear and tear. Dry cotton also tends to be brittle and more easily damaged compared to cotton with the right level of moisture.
Factor 3: Module storage and weather protection
At harvest time for cotton, keep your crop out of the elements with properly constructed modules that offer sufficient protection from weather-related deterioration.
Place modules in locations such as turnrows or field rows that are well-drained, have a level and firm surface and are free of vegetation. Keep cotton away from heavily traveled roads, overhead objects such as power lines and places that could pose risks such as fire or vandalism.
Once your module is built, monitor temperature daily for the first week. If temperatures rise rapidly, between 15 F and 20 F, within that period of time, you’ve got a high-moisture problem. Your cotton should go to the gin promptly to avoid damage to your crop.³
Failure to properly store your crop or mitigate weather damage (or both) can cause color grade to decline from white to light yellow or yellow-stained grades.
Factor 4: Contamination prevention from field to gin
Plastic contamination of the U.S. cotton crop is a major issue because global buyers end up paying less for American cotton relative to fiber from other countries. It also damages the reputation of U.S. cotton.
To keep plastic out of your crop on the way to the gin, know the sources of contamination and mitigate those risks. Keep up with cotton picker maintenance. Take care when handling plastic module wraps to avoid cuts that can shed plastic into your fiber. Avoid introducing field debris, grease and oil from machinery into your crop.
Prioritize field inspections, equipment maintenance and proper handling protocols throughout the harvest season.
Factor 5: Field conditions and harvest scheduling
Time your harvest strategically based on field conditions, environmental factors and local ginning capacity. Many gins have consolidated and increased their average processing volumes over the past few years, so be sure to coordinate your harvest and module-transportation schedules. This will enable you to maximize your efficiency and fiber quality.
Experts are available to help you make decisions about your cotton harvest. Reach out to your seed retailer, a nearby extension office agent or a seed company professional like your regional BASF representative.
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Endnotes
- Snider, John L., and Camp Hand. “Cotton Defoliation in Georgia.” CAES Field Report, University of Georgia Cooperative Extension, 23 Apr. 2024,https://fieldreport.caes.uga.edu/publications/C1281/cotton-defoliation-in-georgia/. Accessed 27 July 2026.
- Valco, Thomas D., W. Stanley Anthony, Richard Byler, Mathew Pelletier, S. Ed Hughs, and Bill M. Norman. Moisture Restoration of Cotton. USDA Agricultural Research Service and National Cotton Ginners Association, Mar. 2004, https://cotton.tamu.edu/wp-content/uploads/sites/27/legacy-files/Harvest/Moisture%20PUB.pdf. Accessed 27 July 2026.
- Just Build...Your Modules: Seed Cotton Storage & Handling in Modules. National Cotton Council of America, in cooperation with Cotton Incorporated and USDA Agricultural Research Service Cotton Technology, n.d., https://cotton.tamu.edu/wp-content/uploads/sites/27/legacy-files/Harvest/Just-Build-It-Seed-Cotton-Storage-Handling-in-Modules.pdf. Accessed 27 July 2026.
