LaMotte SMART 2 Electronic Soil Lab - Manual (Page 51)

EXTRACTION PROCEDURE
The following method of extraction is employed for obtaining the soil filtrate
for the tests for Nitrate Nitrogen, Phosphorous, Potassium, Calcium,
Magnesium, Ammonia Nitrogen, Nitrite Nitrogen, Manganese, Copper, Zinc,
and Iron. Separate extractions are required for the Chloride and Sulfate tests.
Consult the LaMotte Soil Handbook (1504) for information on sampling and
preparation of sample for testing.
n
MULTIPLE TEST PROCEDURE
1. Use the 1 mL pipet (0354) to add 5 mL of *Acid Extracting Solution (6361)
to the 100 mL graduated cylinder (0419). Add deionized water to 75 mL
graduation.
2. Pour this solution into the 100 mL bottle (0990).
3. Use the Soil Measure (1165) to add 15 g (one level measure) of the soil
sample to the bottle.
4. Cap the bottle and shake for 5 minutes.
5. Use the funnel (0459) and filter paper (0463) to filter and collect all of the
soil extract in a 100 mL bottle (0990).
6. The soil extract is used for all of the tests listed above, except Chloride and
Sulfate.
n
SINGLE TEST PROCEDURE
1. Use the 1 mL pipet (0354) to add 1 mL of *Acid Extracting Solution (6361)
to the test tube (0701), then add deionized water to fill to the 15 mL line.
2. Use the 1.0 g spoon (0697) to add 3 measures of soil to the extracting
solution in the test tube.
3. Cap the tube and shake for 5 minutes.
4. Filter, using the funnel (0459) and filter paper (0463) and collect all of the
soil extract.
5. The soil extract is used for all of the tests listed above except Chloride and
Sulfate.
SMART2 SOIL MANUAL 1.07 51