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| Publication Type:
| Refereed |
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| Author(s): | Garay, Adriel;
Elias, Sabry |
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| Author Affiliation: | Oregon State University Seed Laboratory, Corvallis, OR |
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| Title: | New blowing procedure using master calibration samples and air velocity monitoring: A model developed with orchardgrass and Kentucky bluegrass |
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| Section: | Full-length papers
Other records with the "Full-length papers" Section
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| Source: | Seed Technology. Vol. 35, No. 1, 2013, p. 89-101. |
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| Publishing Information: | Jefferson City, Montana: Association of Official Seed Analysts and Society of Commercial Seed Technologists |
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| # of Pages: | 13 |
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| Keywords: | TIC Keywords: Dactylis glomerata; Evaluative methods; Poa pratensis; Seed labeling
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| Abstract/Contents: | "Test result uniformity across laboratories is critical for seed labeling and marketing. One challenge in grass seed purity testing is separating light-weight inert matter such as empty and under-developed florets. A uniform blowing procedure, without measuring air velocity or using master calibration samples, was used to separate lightweight inert matter from pure seeds in orchardgrass (Dactylis glomerata) and Kentucky bluegrass (Poa pratensis) for decades by the Association of Official Seed Analysts. However, the method had limitations including length of time required for blower calibration, need for repeated calibrations, and stability of standard calibration samples (SCS) over years. Orchardgrass SCS variation had been suspected by laboratories, leading to inconsistent test results among laboratories. This study's objectives were to measure variability among SCS in different laboratories and introduce a new blowing procedure using uniform master calibration samples (MCS) to determine the optimum blowing points (OBP) of orchardgrass and Kentucky bluegrass, and use equivalent air velocity (EAV) values to reproduce the OBP over time. Studies were conducted to develop and test the validity of using MCS and EAV to achieve consistent separation of light inert matter within and across laboratories for orchardgrass and Kentucky bluegrass. Using MCS enabled laboratories to find comparable OBP in their blowers and reduced variability in light inert matter separation. Using EAV allowed monitoring the correct setting of blowers accurately and quickly (2 min). The new method proved to be accurate, repeatable, simple to use, and assured uniformity in separating orchardgrass and Kentucky bluegrass light inert matter across laboratories." |
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| Language: | English |
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| References: | 15 |
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| Note: | Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Garay, A., and S. Elias. 2013. New blowing procedure using master calibration samples and air velocity monitoring: A model developed with orchardgrass and Kentucky bluegrass. Seed Technology. 35(1):p. 89-101. |
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