Individual Source 14 records contain an mtrait switch. When set to a valid non-zero value of mtrait (1, 3, or 4) GLOBALmtrait overrides the individual switches and uses the same computational method for all records read from the same file. Only used when source = 14.
GLOBALmtrait = 3
A Manual for Use of BESTPRED: A Program for Estimation of Lactation Yield and Persistency Using Best Prediction