| 1. Use the clean pipette
to transfer 25 drops of the clear solution
above the soil to a clean test tube.
(If more solution is needed, repeat
Part 1). |
|
|
| 2. Fill the tube to
the shoulder with distilled water. |
|
|
| 3. Add one Phosphorus
Tablet to the tube and cap it. Be sure
that all the pieces of the tablet are
added to the test tube. Mix until the
tablet disintegrates. |
|
|
| 4. Rest the test tube
in a cup or beaker. Wait 5 minutes (but
no more than 10 minutes) for color to
develop. |
| 5. Compare the blue
color of the solution to Phosphorus
on the color chart in the Soil Test
Kit. Record your results (High, Medium,
Low, or None) on the Soil Fertility
Data Worksheet. |
|
|
| 6. Discard the solution
and wash the tube and the pipette with
distilled water. |
| 7. Repeat this procedure
with the liquid from each of the soil
samples. Be sure to rinse the pipette
and tube with distilled water after
they are used. |
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