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In the photo below, Dr Karen Jacobsen is demonstrating a portable, home-made, vortex feed dryer on a dairy farm near Tbililsi, Georgia, in 2010.
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Hair dryer vortex Method for Dry Matter Testing (home-made funnel plus hair-dryer) Karen L Jacobsen, BS, DVM, MS email: KLJVET@gmail.com US cell: 706-340-0999 - Use a plastic gallon US milk jug, or other funnel-shaped device.
- Tape plastic screen material over the top opening of the jug.
- Cut a large hole in the bottom of the jug with a scissors.
- Use an elbow-shaped PVC tube plus adapter to cover the screened jug top. Tape this to the jug.
- Keep a cut piece of screen, about 22 cm x 22 cm (10” x 10”) to cover the bottom hole when drying feed.
- Weigh the feed before and after drying. (See Microwave Dry Matter Testing: KarenJacobsen.net )
- Turn the assembly upside down, and add 50g or 100 g of the wet feed to the hole in the bottom of the jug.
- Cover with square piece of screen and attach hair dryer to the PVC elbow.
- Use hair dryer on high setting to rapidly dry the sample, while creating a vortex (whirling) motion inside the jug.
- Remove dry feed and weigh.
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