:;s 



N. II. Age. Expebimeni Station 



[ Bulletin -it;;, 



rest period, produce heavily during February, March and the spring 

 months. Peak production will lie reached about March !>. It is inter- 

 esting to note thai spring production on these early birds is only 

 slightly Lower than that of May hatched birds. 



M 



52 



60 

 46 



46 

 44 



42 



40 

 38 



z x 



6 34 

 6 32 

 | 30 



— <sjr^ — nSJ — •■ pj ^--(*jcj •- ^w == *-*0 "" _ ^ Sj — — to — cu — Kj o — (sj •*-! •- — esj -w Ri — fij «vj — — m e 



£ i 



E 



Figure 16 Assumed percentage production curves for pullets of three 



different dates of hatch 



2. Production Curve on March Hatched Birds 



.March birds, representing a medium date hatch, do not reach as hign 

 a peak in early production as do the earlier birds, bnt the slump due to 

 molt is not as great nor of as long duration. Peak production is reached 

 about the middle of March, — about two weeks later than is the case 

 with the earlier birds. 



3. Production Curve on May Hatched Birds 



Production on May birds shows a gradual increase until the peak is 

 reached about the middle of April. While it does not reach a very high 

 point until March, the increase is gradual and is not interrupted by 

 any molting period. The spring peak in the case of late hatched bird's 

 comes about six or seven weeks later than that of early or medium 

 birds. 



These figures are subject to great modification through certain man- 

 agement methods and systems. A \\>\v poultry men are able to carry 

 March hatched birds through without a molt, It is also true that May 

 birds, through mismangement, sometimes go through a molt. However, 

 it is thought that the production curves are fairly typical and repre- 

 sent the tendency, at least, of the curves of production of birds of these 

 hatching periods. 



