LaMotte Soil pH Test Kit ST-T User Manual
Page 3
4.
Number the samples, keeping an accurate record of
the area represented by each sample. A sketch of
the area, noting the location from which the sample
was taken, is often helpful.
5.
Open the containers to allow the soil samples to air
dry.
6.
Spread each sample on a piece of paper. Remove
foreign material, such as stones.
7.
Crush soil with a rolling pin or plastic spatula and
put through a sieve (such as a screen or flour sifter).
8.
Return this prepared soil to its proper container and
proceed with pH test.
B. SOIL pH TEST
1.
Fill the large well in the spot plate (0159) with soil
sample.
2.
Add *Duplex Indicator (2221), drop by drop, until
soil is saturated. Let the solution soak into the soil
for one minute.
3.
Tilt the spot plate to allow the solution to flow into
the small well.
4.
Match the color of the liquid solution to standards
on the Duplex Color Chart (1313). Record as pH.
5.
Refer to the following table for interpretation of the
test.
· pH 4.0 Very Acid (sour). Needs lime for plants
in all groups.
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