01961naa a2200241 a 450000100080000000500110000800800410001902400340006010000200009424500540011426000090016852013290017765000190150665000210152565000100154665000100155665000140156670000180158070000160159870000160161470000200163077300690165020758902017-09-19       1959    bl uuuu     u00u1 u    #d7 a10.2527/jas1959.1841250x2DOI1 aSPURLOCK, G. M.  aEffect of vitamin D and of shearing on ewe lambs.  c1959  aWeanling ewe lambs on range forage were supplemented with different rations from July 16 to December 2, 1957. Lambs were allotted within different ration groups so as to include three groups of lambs each representing a different shearing treatment. On December 2, 1957 half of each shearing treatment group was given 1 million I.U. of vitamin D by intra-muscular injection. Weight gains were compared over the period July 16, 1957 to April 29, 1958 and clean wool production over the period May 5, 1957 to April 28, 1958. Lambs shorn in August and again in April showed a non-significant increase in weight gains (2.1 lb.) but a significant (P&lt.01) increase in clean wool production (0.97 lb.) compared to the group shorn in April alone. Shearing in March and reshearing in April was of no advantage compared to April-shearing alone. Vitamin D injection tended to decrease gain (not significant) and significantly (P&lt.05) lowered clean wool production, by comparison with controls. Earlier supplementary rations showed no significant effect on weight gains over the total period but did significantly (P&lt.01) affect clean wool production. Neither vitamin D injection nor early shearing was of sufficient benefit to weanling ewe lambs to warrant use in one of the heaviest rainfall years on record in the Hopland area.  aAnimal feeding  aFeed supplements  aLambs  aSheep  aVitamin D1 aTORELL, D. T.1 aMCGOWAN, B.1 aWEIR, W. C.1 aBRADFORD, G. E.  tJournal of Animal Sciencegv. 18, n. 4, p. 1250-1254, Nov. 1959.