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The Journal of Heredity 



produce seedless fruits in San Jose 

 might bear fruits containing seeds if 

 transplanted to the lowlands. The 

 subject requires further investigation. 

 Even in the ordinary forms, however, 

 the seed is not sufficiently large to be 

 objectionable, and since the flesh 

 separates from it readily (after the 

 fruit has been boiled) the seed is not 

 troublesome to one eating the fruit. It 

 is desirable, of course, to plant seeds 

 of a good variety, since there are some 

 which are decidedly inferior: but be- 

 yond this nothing is required to make 

 seedlings sufficiently satisfactory to 



warrant their being planted on a large 

 scale. 



In conclusion, we wish to urge upon 

 horticulturists in tropical regions where 

 this palm is not yet cultivated, the 

 desirability of its introduction and 

 establishment as a common dooryard 

 tree; with a view, later, to the extension 

 of its culture, so as to place the pejibaye 

 upon the substantial basis of a profit- 

 able commercial fruit, a position which 

 we confidently predict it will achieve 

 if the necessary initiative is supplied to 

 effect its preliminary planting and 

 study. 



MILK PRODUCTION OF YOUNG COWS 



J. J. Hooper 

 Division of Animal Husbandry, University of Kentucky 



mature with the third calf. Apparently 

 the cow will hold her maximimi effi- 

 ciency through her tenth year. 



We find also from this table that 

 young cows gain an easier entrance 

 into the Register of Merit than old 

 cows, and this is true with all dairy 

 breeds. To prove this statement we 

 will call attention to the fact that six- 

 year-old cows exceed two-year-old cows 

 by 101 pounds fat, or by 23 per cent, 

 while the standard for entrance into 

 the official test book has a difference 

 between these ages of 110 pounds (250 

 pounds for 2 year-olds antl 360 for five 

 years and over) or 30 per cent. To 

 state it differently, a two-year-old 

 exceeds her requirement by 30 per 

 cent, and the six year old excells hers 

 by only 22 per cent. But the error is 

 not a serious one. 



The records are as follows: 



THE question is often asked as to 

 how much more milk will a mature 

 cow yield than a two-year-old cow 

 with her first calf. In other words, if a 

 heifer produces 6,700 pounds of milk 

 and 360 pounds of butterfat during her 

 first year's milking, how much will she 

 yield as a mature cow, and at what age 

 will she mature, or at what age will she 

 produce the largest quantity? 



To determine this matter I studied 

 the yearly official test records of 865 

 Jersey cows, so my work relates only 

 to that breed, although it holds good 

 in a general way for all dairy breeds. 



From the table below it is found that 

 a heifer that produces 6,700 pounds of 

 milk and 360 pounds butter-fat as a 

 two-year-old will yield 9,000 pounds 

 milk, and 480 pounds butter-fat as a 

 mature cow, at seven years of age. 

 But she becomes over 90 percent as 

 efficient at four years old, or practically 



Production of Young Cows Compared with that of Mature Cows 



