POULTRY PROFITS 



81 



Table 7. Poultry Flocks Classified According to Other Credits than 

 Market Eggs per Bird. 



Index of Change in Flock Size 



Flocks with a low death rate will make a greater labor return than others, 

 and so will flocks in which less culling is necessary. The percentage index of 

 average flock size includes these and other conditions which cause a re- 

 duction in flock size during the year. It also includes the effect of an 

 increase or decrease in the number of pullets which are added to the lay- 

 ing flock in the fall months. The average relation between tiiis factor 

 and labor return per bird for the two years studied may be seen in 

 Table 8 and Figure 3. 



Figure 3. — Net Belation between Index of Change in Flock Size and Labor 

 Return per Bird, 1927. 



LABOR RETURN 

 PER BIRD 



DOLLARS 



50 60 70 60 



INDEX OE CHANGE IN ELOCK SIZE 



90 



The height of the bars represents the average trend of the relationship. An in- 

 crease of 10 points in index of change in flock size was related to an increase of 36 

 cents in labor return per bird. 



