Principle
The amount or Organic Carbon available for plant growth.
Calibration
Use the colour cards to calibrate for Organic Carbon.
- Take the colour card for 0% Organic Carbon.
- Place the cuvette under the light stand with the card over it.
- Turn on the lightbox.
- Place the phone over the stand
- Go to
Settings
>Colorimetric Test
>Calibrate
and chooseOrganic Carbon
- Select the calibration point, 0 in this case
- Click on
Start Camera
- Position the cuvette so that the middle, most uniformly lit portion is within the circle.
- Select
Analyze
- You should have your first calibration point. Repeat similarly with the other calibration points.
Test
- Take 0.5 gm of soil in the small measuring tube.
- Add 5 ml of Organic Carbon Reagent A
- Add 5 ml of Organic Carbon Reagent B
- Shake well and leave for 5 minutes
- Filer and place it the white cuvette.
- From the home screen choose
Colorimetric Test
>Soil
>Organic Carbon
- Choose
No Dilution
if this is the first test, you might have to dilute the sample and retry later if you get an error. - Click on
Start Camera
- Position the cuvette so that the middle, most uniformly lit portion is within the circle.
- Select
Analyze
- After some time, the app will display a result.