Brochure
Features
Wheat, Rice, Corn, Cotton and beyond
Rice Cotton
Trend graph display
Changes in measurement data over time can be seen,
and abnormal values can be noticed at a glance.
Compact and lightweight for portability
The SPAD-502Plus is small enough to t in a pocket and
is extremely lightweight (only 200 g) so it can be easily
taken anywhere.
Quick, easy measurements
Measurements are taken by simply inserting a leaf and
closing the measuring head. It is not necessary to cut
the leaf, so the same leaf can be measured throughout
the growing process.
Water-resistant
The SPAD-502Plus is water-resistant (IPX-4), so it can be
used outside even in the rain.
*It is not immersible, and should not be cleaned with water.
Low power consumption
The SPAD-502Plus uses LED light sources, resulting in
extremely low power consumption. One set of two AA-
size alkaline-manganese batteries can provide approxi-
mately 20,000 measurements.
Small measuring area
The measuring area is only 2 x 3 mm, allowing measurements
of even small leaves. A sliding depth stop is included for
accurate positioning on sample leaves.
High accuracy
High measuring accuracy (± 1.0 SPAD unit for rice-plant
leaves) allows close examination of growing conditions.
Nitrogen management
Nitrogen (N) management is a very important issue for plant growers
and for the environment.
For growers, knowing the N requirement of plant enables the proper
amount of N fertilizer supply to be managed.
Some experiments show that the SPAD series contributed to reductions
in the use of N fertilizer by tens of percents with no loss in yield.
By optimizing the N fertilization eciency in the eld, proper N ferti-
lizer management reduces the possiblity of excessive supply of fertilizer,
Data memory
The SPAD-502Plus has memory space for 30 measurements.
Data in memory can be recalled or deleted at a later time, and
the average value of all data in memory can be automatically
calculated.
Reading checker
A reading checker enables users to check that the SPAD-502 is
functioning correctly and providing accurate readings.
Names of parts
which can cause diseases in plants and environmental contamination.
There is increasing awareness of the need for applying the proper
amount of N fertilizer in respect to water contamination in both owing
streams and underground water due to nutrient leaching through the
eld's soil.
The SPAD series is playing a signicant role in day to day development of
N fertilizer application techniques.
Measuring head
Measurement center line
Press here to close.
Power switch
Receptor
window
Depth stop
Display
ALL DATA CLEAR button
AVERAGE button
1 DATA DELETE button
DATA RECALL button
Battery-chamber cover
N=
30
AVG
35.8
Memory data count
Average Error message