New York AGRICULTURAL EXPERIMENT STATION. 73 
TOTAL ORGANIC NUTRIENTS. 
Groupings of the different records according to the amount of 
the total digestible organic matter are first considered. The 
term “total nutrients ” or “nutrients,” whenever used without 
qualification in the text or tables, refers to the total digestible 
organic matter of the feeding standards without reference to 
the mineral matter. The term “ dry matter,’ however, includes 
the ash. 
CHANGE IN RATIONS WITHOUT CHANGE IN NUTRIENTS. 
The average from 126 individual records in which very little 
change was made in the amount of nutrients—no change on the 
average—shows just about the shrinkage in milk flow that 
would normally occur at this stage of lactation. The average 
month of lactation was 6.2 and the average age of the cows 4.8 
years. There was a moderate gain in weight, the rate tending 
to increase after the change of ration. 
TABLE I.—A CHANGE IN RATION BUT NoT IN AMOUNT oF TOTAL 





NUTRIENTS. 
PER 1000 Les. LIVE WEIGHT AVERAGE PER 
: ° DAY PER Cow. 
Total 
tance, | DIgest- 7 : 
digest: | “ible | Fue | Nvtrl | wink | Fatin 
ganic pre value ars yield. milk. 
matter. ie 
? Lbs. Lbs. Cal. Lbs. Lbs. 
Before 15.0 2.06 |30,030} 1:7.2 | 21.1 -90 
After 15.0 1.98 |30,135). 1:7.5 | 20.5 .86 

Average of 126 rec- 
Approxi- Dry Dry Digest- 
ords from eows 
mate cost | matter | matter in ible dry 
; i Fatin | of food | infood | food for “essen gs in 
averaging 4.8 £ milk. | for one | forone| one Ib. ge he 
yrs. old and 6.2 a Ib. of Ib.\of | of mitk | Ce ie 
: hess ‘lle milk. milk, solids. F 
months in milk, ae solids. 
os) 
ro a | "SS SOO | 
Ls 
m4 Per ct. Cts. Lbs. Lbs. - Lbs. 
7 Before 4.2 -13 1.0 7.6 4.9 
After 4.2 otz 
For about 16 days before change 



