BULLETIN" 1352, U. S. DEPARTMENT OF AGRICULTURE 
Table 6. — Comparison of average initial and retest records of Guernseys having 
initial records made at age of 2 years {single-letter records) 
Num- 
ber 
of 
cows 
Average 
initial 
butterfat 
record 
made 
at 2 to 23^ 
3 T ears 
old 
Average reentry records made at ages shown in 
these columns by same cows as initial records 
shown in column at left (pounds of butterfat) 
In- 
crease 
due to 
age 
Portion of 
reentry record 
due to 
development 
Aver- 
age due 
CO 
q 
JO 
c 
CO 
3< 

<* 
10 
b 
c 
10 
SO 
O 


so 


00 
c 
00 

CO 
C5 
O 
So 
O 
O 

b 



to de- 
velop- 
ment 
fo'this 
group 
48 
Pounds 
424 
449 
427 
435 
418 
416 
430 
381 
406 
443 
401 
402 
390 
333 
390 
501 
Pounds 
31 
54 
70 
74 
91 
91 
93 
83 
88 
97 
88 
Pounds 
46 
43 
44 
43 
87 
67 
77 
110 
93 
80 
87 
105 
162 
160 
66 
50 
49 
63 
30 
86 
82 
60 
104 
88 
11 
204 
71 
P.ct. 
9.2 
7.9 
' 8.1 
7.8 
14.6 
11.7 
12.8 
19.2 
15.8 
12.9 
15.1 
17.6 
25.4 
28.3 
12.2 
9.5 
9.0 
11.5 
5.4 
14.2 
14.3 
11.2 
18.0 
15.2 
1.9 
32.91 
11.0 
25. 6 
P.ct. 
106 
546 
... 
50 
541 
70 
552 
36 
596 
34 
574 
34 
600 
22 
574 
\ 10.7 
18 
587 
I 
11 
620 
1 
6 
576 
1 
10 
595 
! 
88 
85 
2 
637 
. .... 
2 
W5 
72 
85 
2 
-.. 
541 
""-. 
529 
Made at 21 2 
to 3 years old 
.! 
43 
448 
447 
434 
455 
447 
423 
409 
409 
423 
489 
359 
496 
333 
L_ ! ... 
31 
47 
544 
1 1 
! 
48 
50 
73 
72 
68 
66 
66 
68 
78 
58 
27 
547 
1 
23 
-nS 
19 
605 
17 
573 
16 
535 
\ 10.6 
8 
579 
4 
579 
6 
578 
.. 1 . 
2 
621 
647 
2 
519 
80 
1 
53 
133 
Table 7. — Comparison of average initial and retest records of Guernseys having 
initial records made at age of 3 years (single-letter records) 
Average initial 
butterfat 
record made 
at 3 to 314 
years old 
Average reentry records made at ages shown in 
these columns by same cows as initial records 
shown in column at left (pounds of butterfat) 
In- 
crease 
due to 
age 
Portion of 
reentry 
record due to 
development 
Aver- 
age 
due to 
ber 
of 
cows 


10 

"5 
C 
c 
so 



00 

ob 

+a 
OO-. 


3d 
IS 
OS 
O 


si 
1 




s 
z 
devel- 
op- 
ment 
for ' 
this 
group 
20 
Pounds 
421 550 
1 
Pounds 
36 
41 
58 
63 
63 
60 
59 
48 
81 
57 
66 
55 
76 
42 
2 
38 
43 
44 
39 
41 
37 
36 
39 
37 
32 
12 
Pou nds 
93 
84 
94 
43 
47 
61 
98 
69 
19 
159 
73 
314 
—86 
114 
55 
65 
60 
95 
53 
69 
1S5 
97 
149 
182 
218 
321 
95 
P. ct. 
16.9 
14.8 
16.4 
7.6 
8.2 
10.8 
16.6 
14.6 
2.7 
25.0 
11.7 
40.6 
—15.8 
16.9 
10.0 
11.9 
11.2 
15.0 
8.8 
12.2 
26.2 
17.3 
24.4 
26.8 
31.9 
445 
19.8 
Per cent 
30 
442 ... 
— ... 
18 
422 ... 
574 
j 
24 
459 
462 
565 
] 
14 
572 
1 
13 
442 
433 
.357 
592 
421 
486 
405 
555 
517 
563. 
j 
12 
590 
— — 1 
4 
— ... 
-- 1- 
474 
1 
> 13. 2 
3 
! 
692 
1 
3 
— — - 
637 
2 
- i-- 
625 
1 
774 
545 
1 
1 ~ 
1 
1 
---1673 
Made at 3 1 ••> 
to 4 years old 
... 
556 
.. 1 . 
i 
j 
17 
479 
443 
439 
496 
504 
456 
479 
427 
426 
458 
428 
368 
373 
19 
546 
10 
537 
.. _. 
"1 "" 
15 
634 
8 
601 
12 
564 
5 
:ir 
[ 14.6 
4 
1 
561 
3 
611 
2 
fi-Ci 
2 
1 
683 
1 
—L. 
"l " 
721 
1 
...I... 
-_J___ 
:_. 
4S0 
