LIMITED TRAPNESTING 7 



Trapnesting in October only at the beginning of the first laying year did not fur- 

 nish a dependable criterion of annual production (Tables 1 and 2 C). 



Trapnesting in August only at the end of the year was an excellent criterion for 

 predicting the first-year record as is shown by the results in Tables 1 and 2 D. 

 August records are also known to be especially valuable in judging persistency. 



Trapnesting daily from first egg to January 1 is a satisfactory measure from the 

 standpoint of number of eggs laid, but not as accurate as trapnesting two days 

 each month, one week each month, or during August at the close of the laying 

 year (Table 1 and 2 E). This type of trapnesting does have other advantages, 

 however. 



LIMITED TRAPNESTING FOR ESTIMATING EGG WEIGHT 

 TO JANUARY FIRST 



In the selection of pullet breeders there is a very great advantage in being able 

 to forecast their probable egg weight during the breeding season. 



The correlation ceofficients, the calculated and actual average egg weights to 

 January 1, and the percentage accuracy of the several short-time measures are 

 shown in Table 3. The egg weights as calculated by the regression formulas are 

 shown in Table 4, in comparison with the actual egg weights. 



The data show that a close appro.ximation of egg weight to January 1 may be 

 obtained by weighing the eggs of pullets laid on the first two days of October, 

 November, and December; by weighing the eggs laid on the first week of those 

 three months; or by weighing the eggs daily throughout the month of October. 



Table 3. — The Value of Limited Trapnesting for Estimating Probable 

 Egg Weight to January 1. 



