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l J
o
urna
l o
f
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lect
rica
l a
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m
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r
E
ng
in
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ring
(
I
J
E
CE
)
Vo
l.
8
,
No
.
3
,
J
u
n
e
201
8
,
p
p
.
1913
~
1
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1
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3
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1913
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ttp
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lin
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a
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m
y
1.
I
NT
RO
D
UCT
I
O
N
I
n
ag
r
ic
u
lt
u
r
e,
w
ater
a
n
d
n
u
tr
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ar
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t
w
o
cr
itica
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i
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p
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t
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cr
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p
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o
p
r
o
d
u
ce
h
ig
h
in
co
m
e
to
th
e
f
ar
m
er
[
1
]
-
[
3]
.
T
o
ef
f
ec
ti
v
el
y
f
ee
d
th
e
w
ater
a
n
d
n
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x
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w
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th
t
h
e
w
ater
an
d
f
e
ed
to
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e
cr
o
p
s
v
ia
au
to
m
atic
ir
r
ig
atio
n
s
y
s
te
m
[
4
]
-
[
6
]
.
T
h
is
m
et
h
o
d
is
ca
lled
f
er
tig
a
tio
n
.
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h
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e
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an
y
f
e
r
tig
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s
y
s
te
m
th
at
h
a
v
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b
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n
d
ev
elo
p
ed
co
m
m
er
ciall
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,
wh
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n
o
r
m
all
y
u
s
ed
p
H
an
d
elec
tr
ical
co
n
d
u
ct
iv
i
t
y
(
E
C
)
s
en
s
o
r
s
to
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eter
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i
n
e
th
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co
r
r
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tio
n
r
atio
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f
w
ater
a
n
d
t
h
e
n
u
tr
ie
n
t so
l
u
tio
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[
4
]
.
Flo
w
s
en
s
o
r
co
m
b
i
n
es
with
s
o
le
n
o
id
v
al
v
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il
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g
i
v
e
s
ig
n
al
f
o
r
v
o
lu
m
e
o
f
w
ater
f
o
r
co
n
tr
o
llin
g
th
e
ON/OFF
p
er
io
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f
o
r
th
e
f
er
t
ig
atio
n
p
u
m
p
.
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w
ev
er
,
th
ese
co
m
m
er
cial
f
er
ti
g
atio
n
s
y
s
te
m
s
ar
e
h
i
g
h
m
ai
n
ten
a
n
ce
a
n
d
h
i
g
h
co
s
t
d
u
e
to
th
e
in
s
tallat
io
n
o
f
s
o
p
h
is
ti
ca
ted
d
ev
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s
u
c
h
as
d
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s
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n
g
p
u
m
p
a
n
d
h
i
g
h
s
p
ec
co
n
tr
o
ller
[
7
].
I
n
m
a
n
u
al
co
n
v
e
n
tio
n
a
l
m
eth
o
d
,
m
ec
h
a
n
ical
f
lo
at
a
n
d
p
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r
tab
le
E
C
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eter
ar
e
u
s
ed
to
f
i
ll
w
a
ter
in
to
th
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m
ix
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n
g
r
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ir
at
r
eq
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ir
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am
o
u
n
t
a
n
d
m
a
n
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a
ll
y
c
h
ec
k
th
e
n
u
tr
ie
n
t
s
o
l
u
tio
n
co
n
ce
n
tr
atio
n
r
esp
ec
tiv
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y
.
Ho
w
e
v
er
,
th
is
w
i
ll
n
ee
d
t
h
e
f
a
r
m
er
to
d
o
th
e
n
u
tr
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t
s
o
lu
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co
n
ce
n
tr
atio
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ch
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k
a
n
d
m
i
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is
to
b
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p
u
m
p
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to
th
e
cr
o
p
s
.
W
ith
lo
w
m
ai
n
te
n
an
ce
an
d
a
f
f
o
r
d
ab
le
co
n
tr
o
ller
s
u
ch
a
s
A
r
d
u
i
n
o
b
o
ar
d
,
au
to
m
atic
m
ix
i
n
g
s
y
s
te
m
ca
n
o
v
er
co
m
e
th
e
p
r
o
b
lem
esp
ec
iall
y
f
o
r
t
h
e
s
m
all
-
s
ca
le
cr
o
p
s
ize.
An
o
th
er
ad
v
an
ta
g
e
o
f
t
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e
a
u
to
m
a
tic
m
i
x
in
g
s
y
s
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m
is
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ab
i
li
t
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to
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ain
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n
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r
eq
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ce
n
tr
a
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o
f
t
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n
u
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t
s
o
lu
tio
n
ac
co
r
d
in
g
to
th
e
p
lan
t
g
r
o
w
t
h
s
ta
g
es
[
7
]
-
[
11
]
.
W
ith
an
au
to
m
a
ted
s
y
s
te
m
,
t
h
e
f
ar
m
o
p
er
atio
n
w
i
ll
b
e
m
o
r
e
f
lex
ib
le
an
d
th
e
f
er
tig
a
ti
o
n
s
y
s
te
m
w
il
l
b
e
m
o
r
e
ef
f
icie
n
t
to
d
eliv
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th
e
n
u
tr
ie
n
t
s
o
l
u
ti
o
n
to
th
e
cr
o
p
s
[
4
]
,
[
11
]
-
[
1
3
].
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
0
8
8
-
8708
I
n
t J
E
lec
&
C
o
m
p
E
n
g
,
Vo
l.
8
,
No
.
3
,
J
u
n
e
2
0
1
8
:
1
9
1
3
–
1919
1914
I
n
th
i
s
w
o
r
k
,
an
au
to
m
atic
m
i
x
in
g
p
r
o
ce
s
s
o
f
t
w
o
s
to
c
k
s
o
l
u
tio
n
s
(
A
a
n
d
B
)
an
d
w
ater
a
s
d
ilu
tio
n
ag
en
t
w
a
s
d
ev
elo
p
ed
u
s
i
n
g
A
r
d
u
i
n
o
b
o
ar
d
as
th
e
co
n
tr
o
ller
an
d
E
C
s
en
s
o
r
to
r
ea
d
th
e
n
u
tr
ie
n
t
s
o
l
u
tio
n
co
n
ce
n
tr
atio
n
.
Oth
er
t
h
an
t
h
at
,
t
w
o
p
u
m
p
s
ar
e
u
s
ed
to
d
o
s
e
th
e
t
w
o
s
to
ck
s
o
lu
tio
n
s
i
n
to
th
e
m
ix
in
g
r
eser
v
o
ir
an
d
o
n
e
p
u
m
p
is
p
lace
d
i
n
s
id
e
th
e
m
ix
in
g
r
e
s
er
v
o
ir
as
t
h
e
m
i
x
er
.
Fo
r
w
ater
,
i
ts
lev
el
i
s
s
i
m
p
ly
co
n
tr
o
lled
w
i
t
h
a
m
ec
h
a
n
ical
f
lo
at.
2.
RE
S
E
ARCH
M
E
T
H
O
D
2
.
1
.
P
o
rt
a
ble
elec
t
rica
l c
o
nd
uct
iv
it
y
s
ens
o
r
As
th
e
b
a
s
is
o
f
th
e
m
i
x
i
n
g
s
y
s
te
m
,
An
alo
g
E
C
Me
ter
SK
U:
DFR
0
3
0
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C
s
e
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s
o
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le
f
r
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DFR
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b
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t
s
h
o
w
n
in
F
ig
u
r
e
1
is
u
s
ed
f
o
r
th
is
w
o
r
k
.
T
h
e
E
C
m
ea
s
u
r
es
t
h
e
p
o
ten
tial
f
o
r
an
elec
tr
ical
cu
r
r
en
t
to
be
tr
an
s
p
o
r
ted
th
r
o
u
g
h
w
ater
k
n
o
w
n
as
m
o
lar
co
n
d
u
c
tiv
it
y
(
elec
tr
o
ly
t
ic
co
n
d
u
cti
v
it
y
)
.
I
t
ca
n
b
e
r
ef
lecte
d
to
th
e
lev
el
o
f
t
h
e
elec
tr
o
l
y
tes
p
r
esen
t
in
t
h
e
w
ater
.
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h
e
m
o
d
u
le
in
cl
u
d
es
t
h
e
A
r
d
u
in
o
I
O
ex
p
an
s
io
n
s
h
ield
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s
e
th
e
d
if
f
ic
u
lt
y
o
f
u
s
in
g
t
h
e
s
en
s
o
r
.
Oth
er
t
h
a
n
t
h
at,
also
i
n
clu
d
ed
i
s
t
h
e
w
ater
p
r
o
o
f
DS
1
8
B
2
0
tem
p
er
at
u
r
e
s
en
s
o
r
,
w
h
ich
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s
u
s
ed
to
ca
lib
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ate
th
e
E
C
r
ea
d
in
g
ac
co
r
d
i
n
g
to
te
m
p
er
atu
r
e.
T
h
e
co
d
e
f
o
r
th
e
te
m
p
er
at
u
r
e
b
ased
ca
lib
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atio
n
m
eth
o
d
is
s
u
p
p
lied
b
y
th
e
m
a
n
u
f
ac
t
u
r
e
r
th
r
o
u
g
h
o
n
li
n
e
m
ater
ials
.
Ho
w
e
v
er
,
s
in
ce
t
h
e
m
et
h
o
d
o
f
r
ea
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e
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C
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e
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y
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a
n
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f
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er
is
n
o
t
s
u
itab
le
f
o
r
t
h
e
ap
p
li
ca
tio
n
o
f
th
is
w
o
r
k
,
a
m
o
d
i
f
icatio
n
w
a
s
m
ad
e
a
n
d
an
o
th
er
ca
lib
r
atio
n
p
r
o
ce
s
s
w
as
ad
d
ed
.
T
h
is
w
i
ll
b
e
ex
p
lain
ed
in
later
d
is
cu
s
s
io
n
.
Fig
u
r
e
1
.
E
C
s
en
s
o
r
2
.
2
.
O
pera
t
io
n o
f
t
he
s
y
s
t
em
T
h
e
s
y
s
te
m
w
as
d
ev
e
lo
p
ed
o
n
m
i
x
i
n
g
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ir
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h
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p
ac
it
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o
f
4
0
0
L
.
Ho
w
e
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er
,
th
e
p
r
o
p
o
s
ed
s
y
s
te
m
i
s
n
o
t
li
m
ited
to
o
th
er
ca
p
ac
ities
o
f
m
ix
in
g
r
e
s
er
v
o
ir
.
A
ls
o
,
t
w
o
1
0
0
L
r
e
s
er
v
o
ir
w
e
r
e
u
s
ed
to
s
to
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e
t
h
e
s
to
ck
s
n
u
tr
ien
t
s
A
an
d
B
.
W
a
ter
f
o
r
th
e
s
to
ck
n
u
tr
ie
n
ts
d
il
u
tio
n
i
s
f
il
led
in
to
th
e
m
ix
in
g
r
eser
v
o
ir
f
r
o
m
th
e
m
ai
n
w
ater
p
ip
e.
Fig
u
r
e
2
s
h
o
w
s
t
h
e
la
y
o
u
t
o
f
t
h
e
s
y
s
te
m
.
P
u
m
p
A
a
n
d
B
,
w
h
ic
h
ar
e
u
s
e
d
to
f
lo
w
th
e
s
to
c
k
n
u
tr
ie
n
t
s
in
to
t
h
e
m
ix
i
n
g
r
eser
v
o
ir
ar
e
4
.
2
W
w
ater
p
u
m
p
s
w
i
th
a
f
lo
w
r
ate
o
f
2
4
0
liter
/
h
o
u
r
r
ated
at
1
2
V.
T
h
e
co
n
tr
o
ller
u
s
ed
f
o
r
t
h
e
s
y
s
te
m
is
A
r
d
u
in
o
U
n
o
b
o
ar
d
.
T
h
is
co
n
tr
o
ller
is
c
h
o
s
en
f
o
r
i
ts
lo
w
co
s
t
an
d
ea
s
y
f
o
r
co
d
in
g
.
B
esid
es,
th
e
b
o
ar
d
is
also
ea
s
y
to
co
n
f
i
g
u
r
e
w
it
h
m
a
n
y
s
en
s
o
r
s
an
d
a
ctu
ato
r
s
i
n
clu
d
i
n
g
th
e
E
C
s
e
n
s
o
r
m
eter
an
d
p
u
m
p
s
u
s
ed
in
t
h
i
s
w
o
r
k
.
Fig
u
r
e
2
.
T
h
e
lay
o
u
t o
f
th
e
n
u
t
r
ien
t
m
ix
i
n
g
s
y
s
te
m
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
t J
E
lec
&
C
o
m
p
E
n
g
I
SS
N:
2
0
8
8
-
8708
Tit
le
o
f m
a
n
u
s
crip
t is sh
o
r
t a
n
d
clea
r
,
imp
lies
r
esea
r
ch
r
esu
l
ts
(
F
i
r
s
t
A
u
th
o
r
)
1915
T
h
e
n
u
tr
ien
t
s
o
l
u
tio
n
m
i
x
in
g
p
r
o
ce
s
s
is
d
escr
ib
ed
b
y
th
e
p
s
eu
d
o
-
co
d
e
s
h
o
w
n
i
n
Fig
u
r
e
3
w
h
er
e
u
s
er
ca
n
s
et
th
e
r
eq
u
ir
ed
E
C
le
v
el
(
SetEC).
Ot
h
er
t
h
an
th
at,
th
e
e
f
f
ec
tiv
e
n
e
s
s
o
f
t
h
e
m
ix
i
n
g
p
r
o
ce
s
s
ca
n
b
e
co
n
f
i
g
u
r
ed
b
y
s
et
tin
g
t
h
e
E
C
r
ea
d
in
g
d
if
f
er
e
n
ce
v
al
u
e
(
E
C
Dif
f
T
h
r
esh
o
ld
)
an
d
m
ix
i
n
g
ti
m
e
i
n
ter
v
a
l
(
Mix
T
i
m
e)
.
T
h
e
E
C
Dif
f
T
h
r
esh
o
ld
is
a
p
ar
a
m
eter
s
et
to
in
d
icate
w
h
en
w
ill
t
h
e
m
i
x
i
n
g
p
r
o
ce
s
s
s
ettled
.
B
asicall
y
,
t
h
e
m
i
x
i
n
g
p
r
o
ce
s
s
w
ill
s
ta
r
t
w
h
e
n
th
e
E
C
r
ea
d
in
g
o
n
t
h
e
n
u
tr
ie
n
t
s
o
l
u
tio
n
f
a
ll
b
elo
w
th
e
Se
tEC
v
alu
e.
First,
th
e
r
eq
u
ir
ed
a
m
o
u
n
t
o
f
ti
m
e
to
p
u
m
p
t
h
e
s
to
c
k
n
u
tr
ien
t
s
A
a
n
d
B
w
ill
b
e
co
m
p
u
ted
.
T
h
en
a
f
ter
th
e
s
to
ck
n
u
tr
ie
n
t
s
p
u
m
p
ed
in
to
th
e
m
i
x
in
g
r
eser
v
o
ir
ac
co
r
d
in
g
to
th
e
co
m
p
u
ted
t
i
m
e,
th
e
m
ix
i
n
g
p
u
m
p
w
il
l
b
e
o
n
an
d
t
u
r
n
ed
o
f
f
w
h
e
n
t
h
e
m
i
x
i
n
g
s
ettled
(
E
C
v
a
lu
e
d
i
f
f
er
en
ce
g
o
es
b
elo
w
th
e
E
C
Di
f
f
T
h
r
esh
o
ld
)
.
B
ased
o
n
s
e
v
er
al
te
s
ts
,
th
e
b
est
E
C
D
if
f
T
h
r
esh
o
ld
a
n
d
Mi
x
T
i
m
e
v
al
u
es
ar
e
1
0
0
an
d
1
0
0
0
0
r
esp
ec
tiv
el
y
.
Ho
w
e
v
er
,
to
h
av
e
t
h
e
b
est
r
es
u
l
t,
t
h
ese
v
a
l
u
es
co
u
ld
b
e
d
if
f
er
en
t
f
o
r
d
if
f
er
en
t
m
i
x
i
n
g
r
eser
v
o
ir
ca
p
ac
ity
.
Fi
g
u
r
e
4
s
h
o
ws
th
e
f
lo
w
p
r
o
ce
s
s
o
f
t
h
e
a
u
to
m
atic
m
i
x
i
n
g
p
r
o
ce
s
s
.
T
o
h
av
e
an
ac
c
u
r
ate
E
C
v
al
u
e
r
ea
d
in
g
,
t
h
e
„
r
ea
d
cu
r
r
en
t
E
C
v
al
u
e‟
s
tep
i
s
co
n
s
is
ti
n
g
o
f
t
w
o
s
tag
e
s
,
av
er
ag
i
n
g
an
d
ca
lib
r
atio
n
.
Av
er
ag
i
n
g
is
t
h
e
p
r
o
ce
s
s
o
f
r
e
d
u
cin
g
f
lu
c
tu
at
io
n
f
r
o
m
t
h
e
E
C
s
e
n
s
o
r
b
y
ta
k
in
g
s
ev
er
al
r
ea
d
i
n
g
s
a
n
d
av
er
a
g
e
t
h
e
m
o
u
t.
T
h
en
,
ca
lib
r
atio
n
is
t
h
e
p
r
o
ce
s
s
o
f
co
n
v
er
ti
n
g
t
h
e
a
v
er
ag
e
v
al
u
e
i
n
to
a
m
o
r
e
r
ea
s
o
n
ab
le
v
alu
e
b
ased
o
n
th
e
p
r
ed
eter
m
in
ed
ca
lib
r
ati
o
n
p
ar
am
eter
s
.
T
h
e
ca
lib
r
atio
n
w
as
m
ad
e
o
n
t
h
e
ac
tu
al
s
ize
s
y
s
te
m
w
h
er
e
t
h
e
l
in
ea
r
r
eg
r
es
s
io
n
b
et
w
ee
n
t
h
e
r
ea
d
in
g
s
f
r
o
m
t
h
e
s
e
n
s
o
r
an
d
a
m
eter
w
as
p
lo
tted
.
P
ar
am
eter
s
o
b
tain
ed
f
r
o
m
t
h
e
lin
ea
r
r
eg
r
ess
io
n
is
u
s
ed
to
co
n
v
er
t
th
e
ac
tu
al
s
en
s
o
r
r
ea
d
in
g
in
to
a
m
o
r
e
ac
cu
r
ate
v
al
u
e
ac
co
r
d
in
g
to
t
h
e
E
C
m
eter
.
R
ef
er
r
i
n
g
to
lin
e
1
0
o
f
t
h
e
p
s
eu
d
o
-
co
d
e,
th
e
eq
u
a
tio
n
to
e
s
t
i
m
ate
t
h
e
t
i
m
e
tak
e
n
to
p
u
m
p
th
e
s
to
ck
n
u
tr
ie
n
t to
t
h
e
m
i
x
i
n
g
r
eser
v
o
i
r
w
ill b
e
d
is
cu
s
s
ed
f
u
r
t
h
er
in
S
ec
tio
n
3
.
1
.
Fig
u
r
e
3
.
Mix
i
n
g
p
r
o
ce
s
s
Fig
u
r
e
4
.
Sch
e
m
atic
d
iag
r
a
m
f
o
r
n
u
tr
ien
t
m
i
x
i
n
g
f
o
r
f
er
ti
g
ati
o
n
s
y
s
te
m
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
0
8
8
-
8708
I
n
t J
E
lec
&
C
o
m
p
E
n
g
,
Vo
l.
8
,
No
.
3
,
J
u
n
e
2
0
1
8
:
1
9
1
3
–
1919
1916
2
.
3
.
F
er
t
ilizer
a
nd
irrig
a
t
io
n schedu
lin
g
Dif
f
er
en
t
cr
o
p
n
ee
d
d
if
f
er
e
n
t
n
u
tr
ien
t
s
o
lu
tio
n
co
n
ce
n
tr
ati
o
n
.
T
h
e
n
u
tr
ie
n
t
s
o
lu
t
io
n
co
n
ce
n
tr
atio
n
th
at
is
to
o
lo
w
o
r
to
o
h
ig
h
w
il
l
a
f
f
ec
t
t
h
e
p
lan
t
g
r
o
w
t
h
if
n
o
t
m
o
n
ito
r
ed
.
T
ab
le
1
s
h
o
w
s
t
h
e
li
s
t
o
f
th
e
co
n
ce
n
tr
atio
n
lev
el
p
r
o
p
o
s
ed
f
o
r
th
e
r
o
ck
m
elo
n
f
o
r
o
n
e
s
ea
s
o
n
.
I
t
ca
n
b
e
s
ee
n
t
h
at
th
er
e
ar
e
s
ev
er
al
E
C
le
v
el
th
r
o
u
g
h
o
u
t
th
e
c
u
lti
v
atio
n
p
r
o
ce
s
s
.
T
h
u
s
,
t
h
e
p
r
o
p
o
s
ed
m
ix
i
n
g
s
y
s
te
m
s
h
o
u
ld
b
e
a
b
le
to
p
r
ep
ar
e
d
if
f
er
en
t
E
C
lev
els o
f
th
e
n
u
tr
ien
t
s
o
lu
tio
n
.
T
ab
le
1
.
E
C
L
ev
el
f
o
r
R
o
ck
M
elo
n
C
u
lti
v
atio
n
W
e
e
k
s
EC
(
d
S
/
m)
1
1
.
6
2
3
4
5
6
7
8
9
10
1
.
9
2
.
1
2
.
4
2
.
7
3
.
0
3
.
3
3
.
5
3
.
8
3
.
8
3.
RE
SU
L
T
S
A
ND
AN
AL
Y
SI
S
I
n
t
h
is
w
o
r
k
,
t
h
e
p
er
f
o
r
m
a
n
c
e
o
f
t
h
e
s
y
s
te
m
i
s
m
ea
s
u
r
ed
at
t
w
o
s
tag
e
s
.
Fir
s
t
i
s
to
m
ea
s
u
r
e
t
h
e
r
ea
d
in
g
p
r
ec
is
io
n
o
f
th
e
E
C
s
e
n
s
o
r
alo
n
e
b
a
s
ed
o
n
t
h
e
p
r
o
p
o
s
ed
s
en
s
o
r
r
ea
d
in
g
m
e
th
o
d
d
escr
ib
ed
in
Fi
g
u
r
e
3
.
Seco
n
d
,
th
e
p
er
f
o
r
m
an
ce
o
f
t
h
e
s
y
s
te
m
is
m
ea
s
u
r
ed
o
n
th
e
w
h
o
le
s
y
s
te
m
w
h
er
e
th
e
E
C
s
e
n
s
o
r
ac
t
as
th
e
in
p
u
t
to
th
e
s
y
s
te
m
to
s
tar
t a
n
d
s
to
p
th
e
m
ix
i
n
g
p
r
o
ce
s
s
.
3
.
1
.
E
C
s
en
s
o
r
p
re
cisi
o
n
P
r
ec
is
io
n
o
f
t
h
e
A
n
a
lo
g
E
C
M
eter
SKU:
DF
R
0
3
0
0
is
m
ea
s
u
r
ed
b
y
ca
lcu
la
tin
g
th
e
r
elatio
n
s
h
ip
o
f
t
h
e
E
C
v
al
u
e
o
n
s
e
v
er
al
v
o
l
u
m
e
s
o
f
w
ater
.
T
h
e
m
ea
s
u
r
e
m
e
n
t
r
esu
lt
(
Fi
g
u
r
e
5
)
s
h
o
w
s
th
e
li
n
ea
r
it
y
o
f
E
C
an
d
n
u
tr
ie
n
t
v
o
lu
m
e
e
v
en
at
t
h
e
d
if
f
er
e
n
t
v
o
l
u
m
e
o
f
w
ater
.
T
h
is
test
w
as
p
u
r
p
o
s
el
y
d
o
n
e
to
d
eter
m
i
n
e
th
e
r
eg
r
ess
io
n
b
et
w
ee
n
t
h
e
v
o
l
u
m
e
o
f
w
ater
a
n
d
n
u
tr
ien
t to
t
h
e
d
esire
d
E
C
at
d
if
f
er
e
n
t v
o
l
u
m
e
o
f
w
ater
.
T
h
e
o
r
ig
in
al
co
d
e
s
u
p
p
lied
w
it
h
t
h
e
E
C
m
eter
i
s
r
ea
d
in
g
t
h
e
E
C
v
alu
e
b
y
a
v
er
ag
in
g
t
h
e
c
u
r
r
en
t
v
alu
e
w
it
h
all
p
r
ev
io
u
s
r
ec
o
r
d
ed
v
alu
es.
T
h
e
m
et
h
o
d
w
o
r
k
s
w
h
e
n
th
er
e
is
n
o
r
ap
id
ch
an
g
e
o
n
th
e
v
o
lu
m
e
o
f
t
h
e
n
u
tr
ie
n
t
s
o
lu
t
io
n
,
w
h
ic
h
is
m
i
x
ed
w
it
h
t
h
e
w
ater
.
Ho
w
ev
er
,
w
i
th
r
ap
id
f
lo
w
o
f
t
h
e
n
u
tr
ien
t
s
o
l
u
tio
n
in
to
th
e
w
ater
to
b
e
m
i
x
ed
,
th
e
ac
t
u
al
E
C
v
al
u
e
w
ill
r
ap
id
l
y
c
h
a
n
g
e.
T
h
is
is
w
h
er
e
t
h
e
o
r
ig
i
n
al
r
ea
d
in
g
m
et
h
o
d
o
f
th
e
E
C
s
e
n
s
o
r
w
ill
h
av
e
a
cr
itica
l
d
ela
y
to
ac
h
ie
v
e
ac
tu
a
l
E
C
v
alu
e.
T
o
ac
h
iev
e
a
m
o
r
e
ac
cu
r
ate
r
ea
d
in
g
,
t
h
i
s
w
o
r
k
tak
e
s
a
n
a
v
er
ag
e
o
f
t
h
e
last
t
h
r
ee
r
ea
d
in
g
a
n
d
i
g
n
o
r
e
a
r
ea
d
in
g
w
h
e
n
it
is
id
en
t
if
ied
as
an
o
u
tlier
.
B
esid
es
th
e
r
eg
r
e
s
s
io
n
v
al
u
es
as
p
r
ev
io
u
s
l
y
d
is
c
u
s
s
ed
,
Fi
g
u
r
e
5
s
h
o
w
s
th
at
t
h
e
p
r
o
p
o
s
ed
av
er
ag
i
n
g
m
et
h
o
d
g
iv
e
s
a
s
m
o
o
th
r
ea
d
i
n
g
,
s
i
m
il
ar
to
th
e
o
r
ig
in
a
l
m
e
th
o
d
.
T
h
e
s
m
o
o
th
n
e
s
s
o
f
t
h
e
r
ea
d
in
g
i
s
g
etti
n
g
b
etter
w
h
e
n
th
e
v
o
l
u
m
e
o
f
w
ater
in
cr
ea
s
ed
.
Fig
u
r
e
5
.
R
elatio
n
s
h
ip
b
et
w
ee
n
E
C
an
d
f
er
tili
ze
r
v
o
l
u
m
e
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
t J
E
lec
&
C
o
m
p
E
n
g
I
SS
N:
2
0
8
8
-
8708
Tit
le
o
f m
a
n
u
s
crip
t is sh
o
r
t a
n
d
clea
r
,
imp
lies
r
esea
r
ch
r
esu
l
ts
(
F
i
r
s
t
A
u
th
o
r
)
1917
T
o
f
u
r
th
er
tes
t
t
h
e
p
r
ec
is
io
n
o
f
th
e
s
en
s
o
r
r
ea
d
in
g
m
eth
o
d
,
ti
m
e
n
ee
d
ed
to
p
u
m
p
th
e
s
to
c
k
n
u
tr
ie
n
t
A
an
d
B
to
t
h
e
m
i
x
i
n
g
r
eser
v
o
ir
w
as
p
er
f
o
r
m
ed
.
T
h
is
test
u
s
e
d
100
L
r
eser
v
o
ir
f
o
r
ea
ch
o
f
th
e
s
to
ck
n
u
tr
ie
n
ts
an
d
4
.
2
W
w
ate
r
p
u
m
p
s
w
it
h
a
f
lo
w
r
ate
o
f
2
4
0
liter
/h
o
u
r
r
ated
at
1
2
V
in
ea
ch
o
f
th
e
r
eser
v
o
ir
s
.
Fro
m
F
ig
u
r
e
6
,
it
s
h
o
w
s
th
at
th
e
a
m
o
u
n
t
o
f
ti
m
e
it
ta
k
es
to
m
ix
n
u
tr
ien
t
w
as
le
s
s
t
h
an
o
n
e
m
in
u
te
to
ac
h
ie
v
ed
E
C
v
alu
e
eq
u
al
s
to
3
.
5
d
S/
m
,
w
h
i
ch
i
s
t
h
e
m
a
x
i
m
u
m
E
C
v
al
u
e
co
m
m
o
n
l
y
u
s
ed
b
y
f
ar
m
er
s
.
T
h
is
s
h
o
w
s
t
h
at
th
e
E
C
v
al
u
es
r
ea
d
b
y
th
e
s
en
s
o
r
is
n
o
w
f
a
s
t
en
o
u
g
h
f
o
r
th
e
n
o
r
m
al
s
p
ee
d
o
f
th
e
m
i
x
i
n
g
p
r
o
c
ess
.
Fro
m
Fi
g
u
r
e
6
,
th
e
lin
ea
r
r
eg
r
es
s
io
n
p
ar
a
m
ete
r
is
u
s
ed
to
f
o
r
m
u
late
th
e
ti
m
e
esti
m
atio
n
f
o
r
m
u
la
w
r
itte
n
in
th
e
p
s
eu
d
o
-
co
d
e
s
h
o
w
n
in
F
ig
u
r
e
3
.
Fig
u
r
e
6
.
R
elatio
n
s
h
ip
b
et
w
ee
n
E
C
an
d
ti
m
e
ta
k
en
to
p
u
m
p
t
h
e
n
u
tr
ie
n
t so
lu
tio
n
3.
2.
O
v
er
a
ll sy
s
t
e
m
t
est
I
n
t
h
is
test
,
t
h
e
s
y
s
te
m
is
r
u
n
o
n
f
u
ll
o
p
er
atio
n
w
h
er
e
f
r
es
h
w
ater
is
au
to
m
atica
ll
y
f
lo
w
i
n
g
i
n
w
h
e
n
n
ee
d
ed
an
d
th
e
m
i
x
i
n
g
p
r
o
ce
s
s
b
y
f
lo
w
i
n
g
th
e
w
a
ter
u
s
in
g
s
u
b
m
er
s
ib
le
p
u
m
p
is
r
u
n
n
i
n
g
.
Fig
u
r
e
7
s
h
o
w
s
t
h
e
EC
r
ea
d
in
g
o
f
t
h
e
r
ea
ctio
n
o
f
t
h
e
a
u
to
m
ated
m
ix
t
u
r
e
n
u
tr
ien
t
w
i
th
d
esire
d
EC
1
d
S/
m
an
d
2
.
7
d
S/
m
.
T
h
e
s
y
s
te
m
ca
n
m
i
x
t
h
e
n
u
tr
ie
n
t
b
u
t
t
h
er
e
i
s
a
s
li
g
h
t
d
i
f
f
er
en
t
r
ea
d
in
g
w
it
h
th
e
d
esire
d
i
n
p
u
t
s
y
s
te
m
a
n
d
t
h
e
co
n
tr
o
ller
n
ee
d
ed
to
tak
e
tim
e
to
ac
h
iev
e
th
e
d
esire
d
EC
.
T
h
is
i
s
r
ep
r
esen
tin
g
co
n
s
is
te
n
t
av
er
ag
e
s
tead
y
s
ate
er
r
o
r
clo
s
e
to
1
0
%
o
f
th
e
ac
t
u
al
d
esire
d
E
C
v
al
u
e.
Si
n
ce
t
h
e
er
r
o
r
is
co
n
s
i
s
te
n
t,
t
h
u
s
t
h
e
s
y
s
te
m
ca
n
b
e
s
aid
to
b
e
w
o
r
k
i
n
g
a
s
ex
p
ec
ted
w
h
er
e
th
e
er
r
o
r
is
ea
s
il
y
h
an
d
le
b
y
li
n
ea
r
l
y
m
ap
p
in
g
it to
th
e
ac
t
u
al
v
alu
e.
Fig
u
r
e
7
.
R
esu
lt f
o
r
co
n
t
r
o
ller
test
o
n
r
ea
l s
y
s
te
m
4.
CO
NCLU
SI
O
N
A
f
er
tig
at
io
n
co
n
tr
o
ller
w
ith
au
to
m
at
ics
m
ix
in
g
p
r
o
ce
s
s
h
a
v
e
b
ee
n
d
ev
elo
p
ed
w
h
er
e
t
h
e
s
y
s
te
m
is
ab
le
to
p
r
o
v
id
e
co
n
tin
u
o
u
s
s
u
p
p
l
y
o
f
n
u
tr
ien
t
s
o
lu
tio
n
at
d
esire
d
E
C
lev
el.
T
h
e
lo
w
-
co
s
t
d
ev
ice
s
an
d
co
m
p
o
n
e
n
t
s
u
s
e
to
d
ev
e
lo
p
th
e
s
y
s
te
m
a
llo
w
s
m
o
r
e
f
ar
m
e
r
s
in
cl
u
d
in
g
t
h
e
s
m
a
ll
-
s
ca
le
p
r
o
d
u
ce
r
s
to
co
n
tr
o
l
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
0
8
8
-
8708
I
n
t J
E
lec
&
C
o
m
p
E
n
g
,
Vo
l.
8
,
No
.
3
,
J
u
n
e
2
0
1
8
:
1
9
1
3
–
1919
1918
an
d
m
o
n
ito
r
th
e
n
u
tr
ie
n
t
s
o
lu
t
io
n
lev
el
b
ased
o
n
th
e
p
lan
t
g
r
o
w
th
s
tag
e.
T
h
e
test
o
n
1
0
0
L
r
eser
v
o
ir
f
o
r
ea
ch
o
f
th
e
s
to
ck
n
u
tr
ie
n
t
s
an
d
4
.
2
W
w
ater
p
u
m
p
s
w
it
h
a
f
lo
w
r
ate
o
f
2
4
0
liter
/h
o
u
r
r
ated
at
1
2
V
in
ea
ch
o
f
t
h
e
r
eser
v
o
ir
s
s
h
o
w
s
t
h
at
th
e
a
m
o
u
n
t
o
f
ti
m
e
it
tak
e
s
to
m
ix
n
u
tr
ien
t
w
as
les
s
th
a
n
o
n
e
m
i
n
u
te
to
ac
h
iev
ed
E
C
v
alu
e
eq
u
a
ls
to
3
.
5
d
S/
m
,
w
h
i
ch
is
th
e
m
ax
i
m
u
m
E
C
v
al
u
e
co
m
m
o
n
l
y
u
s
ed
b
y
f
ar
m
er
s
.
Alth
o
u
g
h
th
e
s
y
s
te
m
s
h
o
w
s
1
0
%
av
er
a
g
e
f
o
r
t
h
e
s
tead
y
s
tate
er
r
o
r
o
f
t
h
e
d
e
s
i
r
ed
E
C
v
al
u
e,
i
t
ca
n
b
e
s
aid
th
at
th
e
s
y
s
te
m
is
w
o
r
k
i
n
g
w
ell.
I
n
ad
d
itio
n
to
th
is
,
th
i
s
co
n
tr
o
ller
is
lo
w
at
m
ai
n
te
n
an
ce
a
n
d
ca
n
b
e
i
m
p
r
o
v
ed
w
ith
th
e
in
te
g
r
atio
n
o
f
i
n
ter
n
et
o
f
t
h
in
g
(
I
o
T
)
d
ev
ices to
h
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[7
]
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.
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.
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[8
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[9
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1
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3
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.
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CBE
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Pro
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