A plan for judging the composition of feeds

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jJEXICO COHERE OF AC-KICULTURE AND MECHANIC ARTS
AND AGRICULTURAL EXPERIMENT STATION
Press Bulletin 1011
A PLAN FOR JUDGING THE COiiPOSITION OF FEEDS
During the past several years, a system of interpreting chemical analyses of
feeds has heen used by the author with satisfactory results. The system consists
of classifying a feed as roughage or concentrate on the basis of its analysis and
then determining whether it is a protein or carbohydrate feed. The feed analysis
jls ne;rt. compared with a similar well known feed of its class such as corn grain,
<alfalfa hay, corn stover, and cottonseed meal. The rules which have been used for
tnis system are as follows:
I.
Cls
isify as a roughage or a c
A feed with a crude fibe
A feed with a crude fibe
cent cottonseed cake,  which have
Cla
sify as  a carbohydrate or a protein.
A.
Corn is a carbohydrate, concentrate.
B.
Com stover is a carbohydrate,  rougha.
C.
Cottonseed meal is a protein,  concent
D.
Alfalfa is a protein,  roughage.
■ of less than 12 percent is a
■ of more than 12 percent is a
whole pressed cottonseed cake
er 12
per^n^-f^ler.
Using sections  II  and V,  compare tl
feed to which it is roost similar, and desc
poorer than,  or better than this key feed.
These suggestions will help in evaluating t
A. Study the ash content.
1. Most feeds are below 9 percent.
2. Feeds  are high above 15 percent,
B. Determine whether the feed is high or
1. Feeds are low below 8 percent.
2. Feeds  are high above 15 percent.
C. The crude fiber content will usually c
concentrate or a roughage.
1.     A feed is a concentrate if it haj
fiber.
2. A  feed v
roughage
3. A feed i
nore than 12 percent crude fiber :
igh in crude fiber if it contains ;
D. Study the amount of nitrogen-free extract.
1.'   A feed is low below 40 percent.
2. A carbohydrate roughage ranges approximately i
3. A feed is high with 55 to 70 percent.
E. Feeds aro high in fat if they contain more than 4 I