<s>
A	O
leaf	B-Algorithm
sensor	I-Algorithm
is	O
a	O
phytometric	O
device	O
(	O
measurement	O
of	O
plant	O
physiological	O
processes	O
)	O
that	O
measures	O
water	O
loss	O
or	O
the	O
water	O
deficit	O
stress	O
(	O
WDS	O
)	O
in	O
plants	O
by	O
real-time	O
monitoring	O
the	O
moisture	O
level	O
in	O
plant	O
leaves	O
.	O
</s>
<s>
The	O
first	O
leaf	B-Algorithm
sensor	I-Algorithm
was	O
developed	O
by	O
LeafSens	O
,	O
an	O
Israeli	O
company	O
granted	O
a	O
US	O
patent	O
for	O
a	O
mechanical	O
leaf	O
thickness	O
sensing	O
device	O
in	O
2001	O
.	O
</s>
<s>
A	O
solid	O
state	O
smart	O
leaf	B-Algorithm
sensor	I-Algorithm
technology	O
was	O
developed	O
by	O
the	O
University	O
of	O
Colorado	O
at	O
Boulder	O
for	O
NASA	O
in	O
2007	O
.	O
</s>
<s>
AgriHouse	O
received	O
a	O
National	O
Science	O
Foundation	O
(	O
NSF	O
)	O
STTR	O
grant	O
in	O
conjunction	O
with	O
the	O
University	O
of	O
Colorado	O
to	O
further	O
develop	O
the	O
solid	O
state	O
leaf	B-Algorithm
sensor	I-Algorithm
technology	O
for	O
precision	O
irrigation	O
control	O
in	O
2007	O
.	O
</s>
<s>
A	O
Phase	O
I	O
research	O
grant	O
from	O
the	O
National	O
Science	O
Foundation	O
in	O
2007	O
showed	O
that	O
the	O
leaf	B-Algorithm
sensor	I-Algorithm
technology	O
has	O
the	O
potential	O
to	O
save	O
between	O
30%	O
and	O
50%	O
of	O
irrigation	O
water	O
by	O
reducing	O
irrigation	O
from	O
once	O
every	O
24	O
hours	O
to	O
about	O
every	O
2	O
to	O
2.5	O
days	O
by	O
sensing	O
impending	O
water	O
deficit	O
stress	O
.	O
</s>
<s>
Leaf	B-Algorithm
sensor	I-Algorithm
technology	O
developed	O
by	O
AgriHouse	O
indicates	O
water	O
deficit	O
stress	O
by	O
measuring	O
the	O
turgor	O
pressure	O
of	O
a	O
leaf	O
,	O
which	O
decreases	O
dramatically	O
at	O
the	O
onset	O
of	O
leaf	O
dehydration	O
.	O
</s>
<s>
In	O
a	O
2008	O
USDA	O
sponsored	O
field	O
study	O
AgriHouse	O
's	O
SG-1000	O
Leaf	B-Algorithm
Sensor	I-Algorithm
attached	O
to	O
dry	O
beans	O
demonstrated	O
a	O
25%	O
savings	O
of	O
irrigation	O
water	O
and	O
pumping	O
cost	O
.	O
</s>
<s>
In	O
2010	O
the	O
University	O
of	O
Colorado	O
,	O
Boulder	O
,	O
Colorado	O
granted	O
AgriHouse	O
Inc	O
an	O
exclusive	O
license	O
of	O
its	O
patented	O
leaf	B-Algorithm
sensor	I-Algorithm
technology	O
.	O
</s>
<s>
Precision	O
irrigation	O
monitoring	O
using	O
the	O
SG-1000	O
leaf	B-Algorithm
sensor	I-Algorithm
and	O
commercial	O
data	O
loggers	O
for	O
irrigation	O
control	O
has	O
been	O
achieved	O
in	O
recent	O
years	O
.	O
</s>
<s>
Researchers	O
have	O
found	O
a	O
direct	O
correlation	O
between	O
leaf	O
thickness	O
and	O
Relative	O
Water	O
Content	O
(	O
RWC	O
)	O
of	O
plant	O
leaves	O
using	O
the	O
SG-1000	O
Leaf	B-Algorithm
Sensor	I-Algorithm
under	O
field	O
conditions	O
.	O
</s>
<s>
The	O
agriculture	O
sustainability	O
benefits	O
of	O
water	O
and	O
energy	O
savings	O
have	O
been	O
established	O
using	O
the	O
SG-1000	O
leaf	B-Algorithm
sensor	I-Algorithm
under	O
field	O
conditions	O
and	O
in	O
greenhouses	O
.	O
</s>
<s>
Plant	O
science	O
researchers	O
and	O
agronomists	O
have	O
utilized	O
the	O
SG-1000	O
Leaf	B-Algorithm
Sensor	I-Algorithm
for	O
studying	O
the	O
relationship	O
between	O
water	O
content	O
and	O
leaf	O
cell	O
turgidity	O
potential	O
and	O
leaf	O
thickness	O
.	O
</s>
