Oregon State University

Mechanization of Seed Separations

Mechanization and automation of seed testing and seed separations

blower-calibrationThe purpose of this area of research is to incorporate or introduce new technologies to solve problems and develop methods that can better respond to the current and the future industry needs. The ultimate goal in this area is to simplify procedures, increase efficiency and assure quality. 

Completed Projects

  • Development of ergonomic purity examination system (Ergovision) that assures ergonomic working conditions. The new system includes automatic, mechanical seed movement through the field of vision, optimum lighting, and high magnification optic system for accurate identification of seed components. The system has been used successfully for several years and has decreased the analysts’ work related health problems and increased accuracy and timeliness in purity testing results.
  • Development of an efficient test to detect and identify Orobanche seeds (extremely small seeds of a parasitic species) in red clover. With some modifications this method, combined with the use of the Ergovision system could be used to detect and identify any small seeds or particles in any sample.
  • Development of a method to search for seeds in soil samples. The method involves filtration to separate the seeds and sand from finer soil particles; drying and screening of remaining component; and microscopic examination to detect and identify seeds. Currently, the method is used to find seeds in soil banks, feed pellets, compost, and others.
  • Innovation of Uniform Blowing Procedures by development of “Master Calibration Samples” concept and the use of “Air Velocity Value” to calibrate blowers. This concept was incorporated into the AOSA Rules for Seed Testing in 2006. This system can be used as a model to develop UBP for other grass seeds around the world.
  • Identification of optimum blowing point for purity assessment in Seashore paspalum (Paspalum vaginatum).
  • Development of Uniform Blowing Procedure (UP) for tall fescue. Research involved finding the optimum blowing point for this crop by visual examination of caryopsis siize and by germination. Then, Master Calibration Samples (MCS) of proven uniformity were developed, which was used to run a national referee to test the uniformity and time saving achieved with this method.

Interests and opportunities for new projects

  • Continue research to develop UBP for other grasses as perennial ryegrass, fine fescues, etc. The goals with the new methods are: increase simplicity, efficiency and uniformity in inert assessment.
  • Development of continuous flow separation of soil from grass seed samples. The method would be developed for samples but the principles would apply to large commercial operations.
  • Development of continuous flow scarification of seeds. The method would be developed for samples but the principles would apply to large commercial operations.
  • Development and/or evaluation of “blower on wheels for seed/grain separations”. The laboratory model is on wheels, has a capacity to produce a broad range of desired air velocities, can run a broad range of seeds continuously. This model can be scaled up to clean large commercial quantities.

Contact Info

The OSU Seed Laboratory is an AOSA and ISTA member lab and is ISTA Accredited Laboratory US07.

3291 SW Campus Way
Corvallis, OR 97331
Phone: 541-737-4464
Fax: 541-737-2126
seedlab@oregonstate.edu

Hours: 8-5 Mon - Fri
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