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Physical and Mechanical Characteristics of Timothy Hay in Relation to Compression

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:   No Citation available.
Authors:   A Opoku, L G Tabil, M D Shaw, B Crerar, S Talebi

The physical and mechanical characteristics of first-cut high premium and second-cut low premium timothy hay qualities were determined at various moisture contents. The secant modulus for both hay qualities decreased with increasing applied pressure and moisture content. For almost similar moisture contents, the high premium hay was stiffer and offered more resistance to compression than the low premium hay. The static coefficient of friction values for the low premium hay ranged from 0.152 to 0.220 and the values for the high premium hay varied from 0.159 to 0.246, respectively. The dynamic coefficient of friction for low premium hay ranged from 0.133 to 0.187 and the values for the high premium hay varied from 0.146 to 0.243, respectively. The internal coefficient of friction values for the low premium quality hay varied from 0.439 to 0.731 and the values for the high premium ranged from 0.419 to 0.761, respectively. For both hay qualities, the particle density decreased with increasing moisture content. Average particle density for the low premium hay ranged from 1409.2 to 1489.1kg/m3 and the values of the high premium hay varied from 1410.8 to 1522.2 kg/m3, respectively.

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