. Types and market classes of live stock. than thebulk of common lambs, sometimes weighing as much as 100pounds. Growers should castrate their ram lambs a few daysafter they are born. Common lambs are mostly lack of flesh is often due to infestation by internalparasites. Yearlings.—Yearlings are used as a substitute for lambsdn the meat trade. The ability to substitute for lamb depends 188 Types and Market Classes of Live Stock upon weight, quality, condition, and immaturity; for thenearer the yearhng approaches the prime lamb in these re-spects, the better he fulfills his functi


. Types and market classes of live stock. than thebulk of common lambs, sometimes weighing as much as 100pounds. Growers should castrate their ram lambs a few daysafter they are born. Common lambs are mostly lack of flesh is often due to infestation by internalparasites. Yearlings.—Yearlings are used as a substitute for lambsdn the meat trade. The ability to substitute for lamb depends 188 Types and Market Classes of Live Stock upon weight, quality, condition, and immaturity; for thenearer the yearhng approaches the prime lamb in these re-spects, the better he fulfills his function. An index greatlydepended upon for identifying the carcass of a young sheep,or lamb, is the break-joint, which was described in ChapterXIV. Yearlings are commonly referred to as lights andheavies, according to weights. Each year there are anumber of lambs that for one or more reasons should not bemarketed as lambs, and hence the production and marketingof yearlings is economically justifiable. The grades areprime, choice, and Fig. 46. Common or Cull Lambs. Prime yearlings.—To grade as prime, yearlings must behighly developed in form, quality, and condition, and of alight, handy weight, ranging from 70 to 90 pounds. Correctform in the prime yearling necessitates symmetry, compact-ness, roundness, and smoothness, with no suggestion of un-even lines or prominent parts. In quality, the requirementsare fine, clean-cut features, fine bone, and a smooth discrimination is made by buyers against those notshowing a high finish, this being the first essential in primeyearlings. Choice yearlings.—Yearlings of the choice grade outnum-ber those grading as prime. A weight of more than 90 poundsis usually alone sufficient to exclude a yearling from the prime Types and Market Classes of Live Stock 189 grade. Any noticeable departure from correct form, quality,or condition is sufficient to place a yearling in the choicegrade. The difference between prime and choice yea


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