. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. 14 MASS. EXPERIMENT STATION BULLETIN 364 Table 6.—Weight Increase and Decrease, and Annual Production Class of Birds Number of Birds Annual Prod act i (Eggs) Losing more than .25 lb. 24 Not changing weight 74 Gaining . 26- . 74 lb. 251 . lb. 381 lb. 316 lb. 189 2 . 25 lb. or more 74 12. Monthly Body Weight and Monthly Egg Production In this study only birds in the high fecundity experiment and birds with com- plete annual records were us
. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. 14 MASS. EXPERIMENT STATION BULLETIN 364 Table 6.—Weight Increase and Decrease, and Annual Production Class of Birds Number of Birds Annual Prod act i (Eggs) Losing more than .25 lb. 24 Not changing weight 74 Gaining . 26- . 74 lb. 251 . lb. 381 lb. 316 lb. 189 2 . 25 lb. or more 74 12. Monthly Body Weight and Monthly Egg Production In this study only birds in the high fecundity experiment and birds with com- plete annual records were used. A total of 786 birds out of 1,309 with complete records came from the on high fecundity. The hatching dates of these birds covered a 49-day range between March 3 and April 26. Housing facilities were available for 750 pullets each year in three units. The first unit was made up of hatches 1 and 2 and a part of hatch 3, housed near September 1. The second unit included the rest of hatch 3 and practically all birds from hatches 4 and 5, housed about September 15. The third unit was made up from hatches 6, 7, and 8, housed about September 28. All body weights were taken throughout the year on the same monthly calendar date that the birds were housed. Mean monthly weights for the different houses were combined to give a mean for the total population each month. Both weight records and egg production records cover thirteen months. CHARJ 4 MEAN MONTHLY BODY WEIGHT AND MEAN MONTHLY EGG PRODUCTION TOe BIRDS. SEPT OCT NOV. DEC. JAN. FEB MAR APR MAY JUNE JULY AUG SEPT MON THS The graph for body weight (Chart 4) indicates a very rapid increase during the first two months in the laying houses. During this period egg production ran parallel with body weight. From November to March, the increase in body. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illust
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