The objective of this study was to evaluate whether farm owners' estimates of production indices, obtained during a personal interview, were comparable with estimates based on validated prospective production records. The production performance parameters included average inventories, yearly sales, growth rates, and reproductive parameters. Of these, most of the 97 farm owners were able to provide estimates of most parameters except growth rates. Reported values were compared with the validated production indices using the concordance correlation coefficient (CCC), which is an index that estimates the agreement between readings through testing whether the correlation between the readings is on a 45 ° line through the origin. Tests of agreement for yearly sales and average inventories indicated that the CCCs were greater than 0.7. However, CCCs for reproductive indices were less than 0.6, showing that this personal survey provided less accurate estimates of reproductive performance. It appears that prospective records are needed to estimate accurately calculated performance estimates.
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