The monthly equations predicted 83 to 95% of oxen weights to within 610% of 2 weighbridge values, while the equation for the entire year predicted 87%. The R values for the monthly equations ranged 2 from 0.63 to 0.87 and the R value for the entire year was 0.75. The single equation for the year predicted body weight of
oxen as a group to within 627 kg of mean monthly weighbridge values, whereas for a single animal the predicted body
weight was 637 kg of the actual weight (C.I. 95%). The single equation can be used to monitor mean body weight of the
oxen population equally well across working and nonworking periods of the year. 2001 Elsevier Science B.V. All rights
reserved.