LaMotte SMART 3 Electronic Soil Lab - Manual (Page 55)

SMART3 Soil 1.11 55
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.
MULTIPLE TEST PROCEDURE
Use the 1 mL pipet (0354) to add 5 mL of *Acid Extracting Solution (6361) 1.
to the 100 mL graduated cylinder (0419). Add deionized water to 75 mL
graduation.
Pour this solution into the 100 mL bottle (0990).
2.
Use the Soil Measure (1165) to add 15 g (one level measure) of the soil 3.
sample to the bottle.
Cap the bottle and shake for 5 minutes.
4.
Use the funnel (0459) and filter paper (0463) to filter and collect all of the soil 5.
extract in a 100 mL bottle (0990).
The soil extract is used for all of the tests listed above, except Chloride and
6.
Sulfate.
SINGLE TEST PROCEDURE
Use the 1 mL pipet (0354) to add 1 mL of *Acid Extracting Solution (6361) to 1.
the test tube (0701), then add deionized water to fill to the 15 mL line.
Use the 1.0 g spoon (0697) to add 3 measures of soil to the extracting
2.
solution in the test tube.
Cap the tube and shake for 5 minutes.
3.
Filter, using the funnel (0459) and filter paper (0463) and collect all of the 4.
soil extract.
The soil extract is used for all of the tests listed above except Chloride and
5.
Sulfate.
Test P
rocedures