User manual

8
If more than 20 kg quicklime (CaO) or 40 kg
carbonic lime (CaCO
3
) per 100 m
2
is required
to obtain the optimal pH-value, it is neces-
sary to allot the lime quantity to several years
so that the above quantities will not be ex-
ceeded per year.
fig. 1: pH value of the soil
technical data
range 3,0 – 8,0 pH
moisture 8 – 1
accuracy 10 %
power supply no battery required
weights & mearsures 160 x 50 mm, 170 g
accessories measuring beakers (3020)
sandpaper (3023)
extent on the degree on which the soil has
been packed down, and on the moisture con-
tent in the soil. It is recommended therefore
to take the average of 5 or 6 readings.
e) The instrument should be handled with care.
Do not drop it, do not expose it to strong vi-
brations, impact etc. We wish to emphasize
that the pH-Meter is meant to test whether
the soil has the correct pH-value so that in
case of deviation you can protect your crop
from damage in time. If the result is nega-
tive, you can take action immediately and
thus save yourself quite a bit of trouble. The
moisture tester incorporated in the instru-
ment is NOT intended for determining the
exact moistrue content in the soil but ONLY
to determine whether the soil has the right
moisture content for taking pH-readings.
The smaller the wedge the more the nutri-
ents in the soil are bound and consequently
cannot be taken up by the plants. In soils with
a pH-value from 6,5 to 7,0 the capacity for ab-
sorbing is generally great; it decreases either
if the soil is too acidic or too alkaline (fig. 1).
To increase the pH-value of the soil by 1 pH
(e.g. from 5 to 6) the following quantity of lime
is required:
– sandy soils:
30 kg carbonic lime (CaCO
3
)
per 100 m
2
– clayey soils:
17 kg quicklime or slaked lime (CaO)
per 100 m
2
– loamy soils:
20 kg quicklime or slaked lime (CaO)
per 100 m
2