EFFECT OF FEEDING GREEN ALFALFA AND GREEN CORN. 
Tables 1 and 5 indicate that samples from cows fed this amount 
of green alfalfa immediately after milking had less off flavor and 
odor than milk from cows not fed green alfalfa. This is probably 
because the alfalfa overcomes the slightly off flavors and odors 
frequently encountered in the milk of individual cows, either by 
giving a better tone to the milk or by improving the physical con- 
dition of the cow. 
FEEDING 30 POUNDS THREE AND FIVE HOURS BEFORE MILKING. 
In order to determine the length of time after feeding green alfalfa 
to dairy cows that the off flavors and odors produced by this feed 
are perceptible in the milk, one group of cows was fed 30 pounds 
three hours before milking and another group 30 pounds five hours 
before milking. 
Feeding this amount of green alfalfa three hours before milking 
decreased the intensity of the off flavors and odors in the milk, as 
compared with feeding one hour before milking. Ninety-four opin- 
ions on 27 samples of milk produced by cows fed in this manner 
showed 23.4 per cent of the opinions rating the milk normal in flavor 
and 22.4 per cent normal in odor. This is an increase of 7.3 per cent 
for flavor and 8.6 per cent for odor, as compared with feeding one 
hour before milking. A more marked difference, however, was 
found in the decreased percentage of opinions rating the flavor and 
odor of the milk as off, there being 24.4 per cent decrease in the 
rating of flavor and 25.3 per cent decrease in the rating of odor. The 
percentage of opinions rating the milk as very slightly off and slightly 
off showed an increase of 13.4 per cent and 3.7 per cent, respectively, 
on flavor, and 7.8 per cent and 8.9 per cent, respectively, on odor, 
when compared with feeding one hour before milking. 
Feeding green alfalfa three hours instead of one hour before milking 
does not eliminate the off flavors and odors to any great extent. It 
does, however, decrease the intensity of such flavors and odors. 
(Compare Tables 6 and 3; see fig. 2.) 
Feeding 30 pounds of green alfalfa five hours before milking has 
practically no effect on the flavor and odor of the milk. Out of 106 
opinions on 30 samples of milk produced by cows under these condi- 
tions, 88.7 per cent of the opinions rated the milk normal in flavor 
and 87.7 per cent normal in odor. While this is slightly lower than 
the per cent of normal opinions on the check samples, it is evident 
that the off flavors and odors due to feeding green alfalfa five hours 
before milking are practically negligible. (See Table 6 and fig. 2.) 
Table 6. — Opinions on flavor and odor of milk from cows fed 30 pounds of green alfalfa 
three and five hours before milking. 
Rating. 
From cows fed 3 hours before milking 
(27 samples). 
From cows fed 5 hours before milking 
(30 samples). 
Flavor. 
Odor. 
Flavor. 
Odor. 
Opinons. 
Per cent. 
Opinions. 
Per cent. 
Opinions. 
Per cent. 
Opinions. 
Per cent. 
Normal 
22 
20 
29 
23 
23.4 
21.3 
30.8 
24.5 
21 
14 
29 
30 
22.4 
14.9 
30.8 
31.9 
94 
3 
8 
1 
88.7 
2.8 
7.6 
.9 
93 
3 
6 
4 
87. 7 
Very slightly off 
Slightly off 
2.8 
5.7 
Off..... 
3 8 
Total 
94 
100.0 
94 
100.0 
106 
100.0 
106 
100.0 
