LaMotte AST Series Professional Soil Test Outfits - Manual (Page 11)

pH
pH is a measure of alkalinity or acidity. The pH of soil ranges from 3.5 to
11.0, but research has found plants grow best in the range of 5.0 to 8.5.
In soils with low pH, some nutrients may reach toxic levels, and the
activity of soil microbes may be drastically reduced. Soils with a high pH
generally have a lower availability of micro-nutrients, and some
nutrients may not be present at sufficient levels.
A distilled water extraction procedure with a Flocculating Reagent
provides a clear liquid extract, to which *Wide Range Indicator is added.
The resulting color is matched to a color standard to determine the pH.
QUANTITY CONTENTS CODE
500 mL Tricon Flocculating Reagent 5941-L
30 mL *Wide Range Indicator *2218-G
1 Test tube, plastic, w/cap 0106
1 Spoon, 0.5 g, plastic 0698
1 Pipet, 1.0 mL, plastic 0354
1 Octa-Slide Viewer 1100
1 pH Wide Range Octa-Slide Bar 3424
*WARNING: Reagents marked with an * are considered to be potential health
hazards. To view or print a Material Safety Data Sheet (MSDS) for these
reagents go to www.lamotte.com. To obtain a printed copy, contact LaMotte by
e-mail, phone or fax.
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