Instructions:

When measuring the pH value of the soil, first turn the button to the pH, and insert the probe into the soil as far as possible. The upper part of the probe is about 1 cm, and the pointer corresponds to the pH value.

Push the button on the pen to FERTILITY, which also corresponds to three files: fertility is insufficient for fertilization; fertility is just right; too much fertility. Insufficient fertility in the white line section requires fertilization. The fertility of the green line segment is just too much fertility in the red line segment.

When using it, be careful not to touch the stone when inserting the electrode. Do not use excessive force. After use, wipe the electrode clean.

How to analyze soil fertility 1. Remove the topsoil about 5 cm first; then smash the soil down to 13 cm deep. And clean up all impurities in the soil that will affect the test results, such as leaves, roots and so on. 2. Soak the soil with water and make it muddy. (Use rain or distilled water). 3. Wipe the probe with a clean cotton or paper towel. 4. Turn the function button to the left position. 5. Insert the probe into the soil to be tested until the soil is no more than 2.5 cm from the fuselage. Wait 10 seconds , the data can be read after the pointer is stable. 6. Record the data. Remove the probe from the soil and thoroughly clean the probe.

The judgment criteria are as follows (TOO LITTLE) nitrogen is less than 50 ppm phosphorus is less than 4 ppm potassium is less than 50 ppm

ideal range (IDEAL) 50-200 ppm 4-14 ppm 50-200 ppm

excess (TOO MUCH) is greater than 200 Ppm is greater than 14 ppm greater than 200 ppm · Unit ppm: parts per million. If the analysis shows "TOO LITTLE" means: Lack , please use the appropriate liquid fertilizer for the different plants you plant to supplement the crop with nutrients. (Refer to the instructions on the fertilizer bag)

If the analysis results show "IDEAL" means: ideal Depending on the plant you are planting, use the appropriate fertilizer and apply it once a month in combination with irrigation.