cotton seed quality parameters

Gravity table separation groups seeds based on density. h�b```a``r����@��(����a��;@!y����֎���2�&Fi~ 0�22�6|o�;0U@h�̃!KFF��˓+7����mv�6֤2� �bN֢+>� @� ��u Our work makes a difference, in the lives of Texans and on the economy. After obtaining the CWVI test results, seed quality can be categorized into the following groups: “Excellent” = CWVI of 160 or greater; “Good” = 140 – 159; “Fair” = 120 – 139; “Poor” = Less than 120. Seed with the highest possible vigor should be planted earlier in the season, or when planting conditions are less than desirable. These parameters refer to the chemical, microbiological, nutritional and physical factors that make up the coconut liquid products its unique properties, which also influences the products shelf life. Over the last several years, producers have scrutinized costs and benefits of numerous new cotton varieties. Planting high quality cottonseed is essential to beginning the season off right. By: Dr. Randy Boman, Extension Agronomist-Cotton, Texas Cooperative Extension; Dr. Norman Hopper, Seed Physiologist, Texas Tech University. With the increase in cost of most current cotton varieties and the use of new planting equipment, many producers are reducing seeding rates, placing even more importance on planting high-quality seed. The ginneries engaged in cotton seed are normally evaluated for their performance and seed quality. It is not unusual to see germination percentages increase by 10 to 20 percentage units after acid delinting and gravity table separation. Trueness to variety; the presence of inert matter, seed of other crops, or weed seed; germination percentage; vigor; appearance; and freedom from disease are important aspects of seed quality. 18 0 obj <> endobj For standard warm germination and cool germination tests, you can use fuzzy seed; however, after delinting and gravity table separation, germination percentages usually will be higher. �f(h�Ʌs�Aa%�u��Dc�;h)���9� h��-AJ�� Texas A&M Veterinary Medical Diagnostics Laboratory, Texas A&M College of Agrculture and Life Sciences, Conduct Germination Tests for Seed Samples with FFA Less Than 1 Percent, Determine Cool-Warm Vigor Index For Delinted Seed, SE Region Row Crop Initiative Grain and Cotton Marketing Update: Online Zoom, https://www.youtube.com/watch?v=Wc8xY2YuOfM. Do you have a question -or- need to contact an expert? High-quality cotton seed is critical for establishing good stands. 35 0 obj <>/Filter/FlateDecode/ID[<0977A315A7D918A6B3975DAA3FC3D0F1>]/Index[18 38]/Info 17 0 R/Length 95/Prev 189606/Root 19 0 R/Size 56/Type/XRef/W[1 3 1]>>stream %PDF-1.6 %���� High-quality cotton seed is critical for establishing good stands. (Make sure not to combine lots or varieties. After delinting and gravity separation, go one step further and have a cool-warm vigor index (CWVI) test performed by the TDA to give the best indication of overall seed quality. Over the last several years, producers have scrutinized costs and benefits of numerous new cotton varieties. h޼WmO�F�+#�K+�y�_��IIJ�Z�!�\%���`)�QbNܿ�̮��8� ���˼����ٵ4�@Z��e@z�.4(� 0 Expect at least a 2-week turnaround time for these analyses. Many growers have opted to continue to plant conventional cotton varieties and have continued saving seed to have it delinted, treated and bagged for planting the following season. With the increase in cost of most current cotton varieties and the use of new planting equipment, many producers are reducing seeding rates, placing even more importance on planting high-quality seed. ���W���h�.�)�9�]�L1�qBR�g8o1�Zw�ݧ����"9�\|99�I0��G��.�o>x��V�������)T��� ��| ���e��O�}`"��~�%���y�VYR��O��g���5������?���`y�X�Qz��wq�[5���d. Fiber Strength, next important quality is tested using Pressley instrument and the value is given in Thousands of Pounds per Square inch. Evaluating Cotton Seed Quality Dr. Randy Boman, Extension Agronomist-Cotton, Texas Cooperative Extension Dr. Norman Hopper, Seed Physiologist, Texas Tech University E-353 07/05 . Generally, there is nothing wrong with seed in the “Good” category; however, “Fair” category seed should be used mostly for late plantings or replanting, and “Poor” category seed should not be planted. Add the results of the two tests (warm germination test counted at 4 days and cool germination test) to provide the CWVI. The CWVI is actually the combined percentage germination for the standard warm germination test (counted at 4 days) and the cool germination test. Cotton Seed Quality - Where It All Begins Todd Baughman, Randy Boman, and Robert Lemon Extension Agronomists, Vernon, Lubbock and College Station, TX Department of Soil & Crop Sciences Producing a high yielding cotton crop begins with establishing a good stand. Seed quality becomes more critical at the reduced seeding rates to which many growers have become accustomed. However, an FFA level of 1 percent or lower does not necessarily guarantee that seed is of high quality. Producers who plan to save seed from conventional varieties are advised to consider evaluating seed quality prior to planting season, using procedures such as the free fatty acid test, germination tests and the cool-warm vigor index.

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