Hanna Instruments HI 3896 - Manual (Page 2)

2
SOIL AND PLANT LIFE ............................................................................................ 3
PHYSICAL STRUCTURE ........................................................................................... 4
CHEMICAL COMPOSITION ....................................................................................... 5
pH .................................................................................................................... 5
Management of the soil in relationship to pH values ............................................. 7
Nutrients ........................................................................................................... 9
Fertilization ....................................................................................................... 9
SOIL ANALYSIS .................................................................................................... 13
Sampling ......................................................................................................... 13
Test procedure .................................................................................................. 14
Health & Safety ............................................................................................... 15
Index
15
Allow the tube to stand for at least 5 minutes. The clearer the extract becomes the
better. However, some cloudiness will not affect the accuracy of the test.
• Nitrogen (NO
3
) test
Use the pipette to transfer 2.5 ml of the clear general soil extract to a clean test
tube. [Pay attention not to transfer any soil. To avoid agitation of the soil, squeeze
the bulb of the pipette before inserting it into the soil extract solution.] Add the
content of one packet of HI3896-N reagent. Replace the cap and shake vigorously
for 30 seconds to dissolve the reagent. Allow the tube to stand for 30 seconds.
Match the pink color with the NO
3
color-card, and note the NO
3
.
• Phosphorus (P
2
O
5
) test
Use the pipette to transfer 2.5 ml of the clear general soil extract to a clean test
tube. [Pay attention not to transfer any soil. To avoid agitation of the soil, squeeze
the bulb of the pipette before inserting it into the soil extract solution.] Add the
content of one packet of HI3896-P reagent. Replace the cap and shake vigorously
for 30 seconds to dissolve the reagent. Match the blue color with the P
2
O
5
color-
card, and note the P
2
O
5
.
• Potassium (K
2
O) test
Use the pipette to add 0.5 ml of the clear general soil extract to a clean reaction
tube. [Pay attention not to transfer any soil. To avoid agitation of the soil, squeeze
the bulb of the pipette before inserting it into the soil extract solution.] Fill the tube
to the lower graduation mark (2.5 ml) with the HI3896 Extraction solution. Add
the content of one packet of HI3896-K reagent. Replace the cap and shake
vigorously for 30 seconds to dissolve the reagent. A blue color develops. Read the
TURBIDITY formed on the K
2
O reading-card as explained in the “Test Procedure”,
and note the K
2
O.
Note: Note: Note: Note: Note: prolonged exposure to light may damage the colors of the comparing cards and
cause them to shift or fade. Please store them out of light when not in use.
Health
& Safety
Contents
The chemicals contained in this test kit may be hazardous if improperly handled. Read carefully Health & Safety
Data Sheets before performing the tests. Keep your kit out of reach of children. Store it indoors in a clean, dry location.
Keep away from food, drink and animal feed. Always wash your hands thoroughly after making your tests.
Health and safety data sheets are available on line: www.hannainst.com
240 ml of HI 3896 Extraction solution; 100 ml of HI 3896 pH indicator reagent; 75 powder packets (25 each for N,
P and K); 3 pipettes (1 ml); 5 test tubes; 1 tube-stand; 1 spoon; 1 brush; 4 color cards; 1 graduated card; 1
handbook.