Growth and Development with Special Reference to Domestic Animals: Relation between body weight, amount of wool or feathers, and temperature regulation. XLVIII
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Agric AGRICULTURAL EXPERIMENT STATION Amount of Wool area with increasing average birds body weight increases contour feather creases decrease with increasing diﬁerent directly with body Dorsets equation feather weight tends females ﬁg following the yearling gg g_ hair or feathers Hampshires head per 100 HERMAN FRASCH increasing body weight inﬂuence of age live weight lower-right MISSOURI AGRICULTURAL EXPERIMENT number of feathers percentage change plotted against body power of body proportional to surface quill ratio of wool relation between feather relation between wool RESEARCH BULLETIN 287 shown in Fig Shropshires signiﬁcance Southdown surface area tends to vary thermoregulatory unit area unit of amount unit surface area UNIVERSITY OF MISSOURI weight and body weight and feather weight and wool weight by 100 weight per unit weight to body weight to surface wool and feather Wool or Feathers wool production wool weight yearling stage