TY - JOUR AU - Johnson, W. H. AU - Elings, J. T. TI - Earlier calves are heavier calves JF - California Agriculture JO - Calif Agr Y1 - 1969/10/01 VL - 23 IS - 10 SP - 9 EP - 10 PB - University of California Agriculture and Nature Resources SN - 0008-0845 UR - http://www.ucanr.edu/sites/calagjournal/archive/?article=ca.v023n10p9 AB - CATTLEMEN HAVE OBSERVED that calves dropped early in the calving season arc heavier at weaning and more profitable than calves dropped late in the calving season. Animal scientists have pointed out that weaning weight is the result of age at weaning and average daily gain from birth to weaning. Actual differences under California annual range grazing conditions have not been reported in any detail.