N. H. Agricultural Experiment Station [Bulletin 302 



Table 4. Adeqtmcy of the number of heifers on hcvnd April 30, 1933 to 

 re/place cows eliminated driving the year, by counties. 



* Concerns 190 farms. 



t Minus sign denotes deficiency. 



Table 4). The number of heifers of all ages inventoried at the end of 

 the year came short only five, less than one-fourtli of one per cent of being 

 adequate to replace all the cows disposed of. Rockingham County was 

 deficient 141 heifers compared with an excess of 138 in Merrimack 

 County, the percentage deficiency and excess amounting to 38.1 and 

 33.1 respectively. 



Those herds in which the Holstein breed was predominant, and also 

 Jersey herds, were nearly adequately supplied with heifers, whereas 

 the Ayrshire, Guernsey and dual purpose herds had approximately a 

 50 per cent excess of heifers. Mixed herds which, as was shown pre- 

 viously, consisted mainly of purchased cows and had the least number 

 of heifers in proportion to the number of cows, had approximately one- 

 half as many heifers as would be required for replacements. 



There were 81 herds which consisted entirely of grade cows and 25 

 which consisted only of purebred cows, all others having both grades 

 and purebreds. The average age at which heifers freshened was 2.2 

 months greater for grade herds than for purebreds. Grade herds were 

 short 91 lieifers of having enough to replace all cows eliminated during 

 the year, compared witli an excess of 47 for purebred herds, the per- 

 centage deficiency and excess amounting to 11.2 and 15.1 respectively. 

 The 94 fai'ms on which the herds consisted of both grade and purebred 

 cows had only a slight excess of heifers. 



