Transcription of FORAGE ANALYSES PROCEDURES - foragetesting.org
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FORAGE ANALYSES PROCEDURES - foragetesting.org
$ FORAGE ANALYSES . PROCEDURES . Dr. Dan Undersander, University of Wisconsin Dr. David R. Mertens, USDA-ARS US Dairy FORAGE Research Center Ms. Nancy Thiex, South Dakota State University July, 1993. National FORAGE Testing Association Box 371115. Omaha, NE 68137. (402) 333-7485. Table of Contents Historical Development of FORAGE Quality Testing Certification .. 1. Section A - laboratory Sample Preparation .. 2. 1. Sample Preparation .. 2. Preparing samples greater than approximately 85% dry matter for grinding .. 4. Preparing samples less than approximately 85% dry matter for grinding .. 5. Grinding with a Cutting Mill .. 6. Grinding with a Cyclone Mill (Udy, Cyclotec or equivalent) .. 7. Section B - PROCEDURES for Certification .. 8. 2. Dry Matter Determination .. 11. Single Step Total Dry Matter 13. Total Dry Matter by Oven Drying for 2 hr at 135oC .. 13. Total Dry Matter by Oven Drying at 100oC for 24 hr or 105oC for 16 17. Total Dry Matter by Microwave Drying to Constant 21.
5 Section A - Laboratory Sample Preparation Subsampling or sample reduction of an unground sample in the laboratory is frequently the largest single source of variation during the analysis procedure and should be avoided whenever
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