LaMotte Soil Test Kit 5679 - Manual (Page 4)

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Phosphorus Test, continued
Remove cap. Allow
to stand, and soil to
settle, until liquid
above soil is clear.
Use one pipet (0364) to transfer
the clear liquid to a second clean
test tube. To avoid agitation of
soil, squeeze bulb of pipet before
inserting tip into liquid. Release
bulb slowly to draw clear liquid
into pipet. Do not pull up any
soil. Fill second tube to line 3.
Add six (6) drops
of *Phosphorus
Indicator Reagent
(5705) to soil
extract in second
tube.
Cap and mix. Add one
*Phosphorus
Test Tablet
(5706A).
Cap and mix until
tablet dissolves.
A blue color will
develop.
Match color reaction with
Phosophorus Color Chart (1372) .
Record result as Phosphorus.
Low 0-50
lb/acre
Medium 50-100 lb/acre
High +100 lb/acre