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School
Iowa State University *
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Course
320
Subject
Health Science
Date
Dec 6, 2023
Type
Pages
4
Uploaded by boltonlisa729
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Animal
Science
320
Problem
Set
2
50
points
EXER
=
Review
of
Dry
Matter
Calculations
In
the
following
table,
convert
the
nutrients
or
intake
to
dry
matter
or
as
fed
basis
as
indicated.
This
is
a
review
of
last
week’s
problem
set
but
a
critical
set
of
skills
you
must
master
to
finish
out
the
semester.
Remember,
the
math
is
opposite
if
you
are
working
with
concentrations
of
nutrients
(dry
matter
basis
is
higher)
or
feed
intake
(dry
matter
intake
weight
is
lower).
You
need
to
be
able
to
identify
if
you
are
working
with
a
nutrient
concentration
or
intake
in
order
to
complete
the
math
correctly.
1.
Convert
the
following
nutrient
concentrations
(in
this
case,
iron)
in
the
feedstuffs
to
either
as-fed
or
dry
matter
basis
as
indicated.
Answer
in
1
decimal
is
OK.
—_——
Copper,
ppm
Feedstuff’
DM.
%
As-fed
basis
DM
basis
A
15.0
120.0
200
B
75.0
298.
%
325.0
C
25.0
7.5
30
D
35.0
>
>
95
2.
Convert
the
animal
feed
intakes
to
either
as-fed
intake
or
dry
matter
intake
(DMI)
as
indicated.
Diet
DM
Intake,
Lb/day
Animal
DM,
%
As-fed
intake
Dry
matter
intake
A
15.0
20.0
3
B
80.0
35
28.0
C
90.0
10.5
%S
D
30.0
4.F
125
If
the
animals
in
#2
above
are
consuming
diets
that
contain
the
crude
protein
concentrations
below,
how
many
pounds
of
protein
are
they
consuming
on
a
dry
matter
basis?
Animal
|
Crude
protein
in
feed,
%
|
Lb
of
protein
consumed
DMB
(DMB)
A
14.0
D,
&
3y
B
30.0
B.¢
2%x
.3
@
9.0
.9
2.5%.09
P
20
o
2.5%,33
60t/
0252
H{/zfl';’%“h
EXERCISE
2
—
Pre
Lab
Assessment
wapter
3
of
the
E
text
and
complete
E
Text
Pre
Lab
Assessment
for
Chapter
3
and
answer
the
following
questions
about
the
3
primary
fiber
assays.
o
pf
2.
Whatis
the
fiber
assay
that
is
the
“gold
standard”
for
the
feed
industry?
_
/7
ude
%"
é
g
i
3.
Whatis
considered
the
most
accurate
fiber
assay
to
evaluate
fiber
in
feeds/foods?
A
D
=
4.
Whatis
the
most
common
fiber
assay
used
to
evaluate
forages
for
herbivores?
\D
A
%‘Ff
Cfl?'ff‘}
NOF/AD
EXERCISE
3
-
ADIN
1.
What
s
the
numerical
factor
used
when
converting
%
nitrogen
in
a
feed
to
%
crude
protein?_(2:
25
-
ADIN
and
heat
damaged
forages.
The
table
below
contains
data
on
several
hay
samples.
Heat
damage
is
determined
when
nitrogen
is
attached
to
the
ADF
residue
in
the
hay,
termed
Acid
Detergent
Insoluble
Nitrogen
(ADIN)
and
is
no
longer
available
to
the
animal,
also
called
“unavailable
nitrogen”.
Even
though
it
is
unavailable
to
the
animal,
it
is
still
part
of
the
total
nitrogen
in
the
feed.
Therefore,
Total
nitrogen
=
unavailable
nitrogen
(ADIN)
+
available
nitrogen
Total
protein
=
unavailable
protein
+
available
protein
Table
1.
Calculate
available nitrogen
in
the
last
column.
Answer
a2
decimal®
%
of
DM
Hay
sample
DM,
%
Total
N
ADIN
Available
N
A
80.00
2.50
035
2./5
B
89.00
2.00
0.60
.90
c
85.00
6.80
0.60
%.20
D
90.00
1.75
025
.
SO
Table
2.
From
the
data
in
Table
1,
calculate
total
protein
(CP),
unavailable
protein
(CP)
and
available
protein
(CP)
on
a
dry
matter
basis.
Hint:
You
need
your
answer
in
#3.
Answer
with
2
decimals.
Hay
sample
Total
CP,
%
DM
Unavailable
CP,
%
Available
CP,
%
DM
DM
A
2.5%
.25
=
JS.63
.35,6.25
=2.19|
15.3-2.9
=
|/3YY
B
1.
50
3.
9S
&7y
c
Y3
50
3.2S
38.¥5
D
0.9
0.94
/0.00
ADIN
is
cons
i
.
i
”
o
3.A
I
Iv‘v
:‘;nfldcrfd
the
unavailable
nitrogen
and
s
then
evaluated
as
a
%
of
the
total
nitrogen
to
determine
if
the
o
e
evaluating
has
been
heat
damaged.
The
following
are
common
guidelines
used.
a.
0-10%;
ADIN
as
a
%
of
total
nitrogen
=
little
heat
damage
l?.
1
|-2°5
%o
ADIN
as
a
%
of total
nitrogen
=
moderate
heat
damage
€.
>26%
ADIN
as
a
%
of
total
nitrogen
=
severe
heat
damage
q
P
In
ord;r
to
determine
if
your
hay
samples
are
heat
damaged
you
need
to
calculate
the
ADIN
as
a
percent
of
the
total
nitrogen.
Calculate
those
values
below
along
with
an
indication
of
little,
moderate
or
severe
heat
damage.
Hay
sample
ADIN,
%
of
Total
N
Heat
Damage
(Little,
Moderate,
(round
to
1
decimal
is
OK)
Severe)
A
25/0.60
J9%
Moderate
B
304
=
30%
Severe
€
/R
W:R%
L
He.
D
28/125
=
432N
ModeralCo
EXERCISE
4
—
Detergent
Analysis
System
1.
Your
feed
samples
come
back
with
the
following
values
for
ADF,
NDF
and
lignin.
How
much
hemicellulose
and
cellulose
arc
in
cach
of
your
samples.
Assume
all
values
are
on
a
dry
matter
basis.
(4
points)
Sample
|
NDF,%
|ADF,%
|
Lignin,
%
|
Hemicellulose,
%
|
Cellulose,
%
£
(1
decimal
place)
|
(1
decimal
place)
1’
A
45.0
18.0
2.0
2.5
I@
D
Ll
{)
B
500
20.0
15
30,0
1%8.S
C
20.0
6.0
1.0
14.
D
5.0
D
180
20
0.5
o>
P
Z
NOF
-
ADF
ADF
-
/iym‘/\
2.
A
cow
consumes
28
Lb
(as
fed)
of
a
diet.
(44
)
points)
§
Dict
information
]
Nutrient
|
Dry
matter,
%
89.0
Protein,
%
DM
135
(,‘
Pf
NDF,
%
DM
55.0
|
(Answer
to
1
decimal)
28y
.89=
24.92
A.
Calculate
DMI
for
your
cow
in
1b?
o
3
@
B.
Calculate
protein
intake
for
your
cow
in
Ib
of
DM.
S=7
|
C.
Caleulate
NDF
intake
for
yor
inIb
of
DM.
-
|
your
cow
in
Ib o
29255
)3
7)
|
o
i
e
3
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EXERCISE
5
—
Energy
Analysis
I/\
‘3‘(
1.
Read
Chapter
4
in
the
E
Text
and
complete
Pre
Lab
Assessment
for
Chapter
4.
Note
you
should
expect
to
see
various
unit
conversions
throughout
the
semester
as
shown
in
the
Pre
Lab
Assessment.
Refer
back
to
problem
set
1
—
exercise
1
for
common
conversions
to
expect
throughout
the
semester.
{'
2.
Briefly
explain
how
a
bomb
calorimeter
determines
energy
in
a
feed.
Hint:
Your
answer
should
include
q
?
temperature
and
water
weight.
Sample
Combustecd
1n
a
sealed
conTaurnet
Chassed
with
buygen.
Coatasaw
/5
submorge/
in
|
Ky
of
wnder.
vhe
heat
released
From
Combushen
17creases
the
woater
/?/h,d@’afi//e