Tag: "style"

  • Wethers from a mixed bloodline flock in western New South Wales were coated for 12 months between August 1998 and August 1999. The coated and a similar number of uncoated control wethers from each of the 11 bloodlines (2 medium, 3 fine and 6 superfine) were grazed together as part of a larger mob. Dye bands were placed in the fleeces of each wether before fitting of the coats and were removed before shearing when a mid-side sample was taken and a number of subjective assessments made of each fleece. The major effect of the sheep coats was to improve the style of the coated wool by about 1 style grade. This was largely the result of the coated fleeces being whiter, with less tip weathering and lower levels of dust and vegetable matter. There was no significant difference between the 2 treatment groups in wool production, fibre diameter, staple strength or resistance to compression. A partial budgeting approach was used to evaluate the economic returns from using sheep coats based on the observed differences in wool quality. Clean prices and wool values per head for the coated and uncoated sheep from each of the 11 bloodlines were calculated using NSW Agriculture's wether trial software and the flock least squares means for each wool trait. The analysis established it would be economically viable to coat all the sheep except the medium-wool sheep. Even allowing for 20% improvement in the price differential for medium wool, coating them was not economically viable. more »
  • On completion of this topic you should be able to: • demonstrate an understanding of fibre diameter and the economic importance of fibre diameter • explain and calculate the difference between the standard deviation of diameter and the coefficient of variation of diameter • define the relationship between mean diameter, diameter variation and “coarse edge” or “prickle” • measure staple strength and describe its economic importance • explain the sources of variation in staple strength within a mob of sheep • describe localised vs generalised fibre weakness as determinants of staple strength • define and quantify the relationship between staple strength and each of minimum diameter, along-staple diameter variation, rate of change in diameter, fibre length variation and intrinsic fibre strength • relate raw wool style including the main component traits to economic importance • explain the influence of fibre diameter and fibre crimp on wool handle • describe fibre curvature and the value of curvature more »
  • Everyone who comes on the farm these days is concerned about two items - micron count and crimp. I, myself, have written much about the virtues of skinny fleece and bold crimp, so I began to ponder whether this narrow focus was all that healthy for our industry. more »