In this article, we'll discuss what the pH indicator tells us, how to test pH using various methods, and how to properly collect soil samples to obtain reliable results.
What does the soil pH indicator tell us?
The soil pH indicator is the key to understanding the chemical properties of the substrate in your garden. It defines the ratio of hydrogen ion concentration to hydroxide ion concentration in the soil, which in practice determines its acidity or alkalinity.
The pH scale ranges from 0 to 14, where values below 7 indicate acidic soil, 7 is neutral, and above 7 — alkaline. pH below 4.5 is considered very acidic, 4.5–5.5 is acidic, 5.5–6.5 is slightly acidic, 6.5–7.2 is neutral, and above 7.2 — alkaline.
Remember: soil pH is not constant — it can change depending on the fertilizers used, rainfall, and organic matter. Therefore, regular testing of soil pH helps maintain optimal conditions for our plants.
Soil pH measurement — how to measure soil pH?
Understanding and monitoring soil pH is crucial for the health and development of plants in our garden. There are several methods that allow us to effectively and accurately measure the pH level of our soil.
Soil pH measurement methods
There are various methods for measuring soil pH. One of them is using laboratory services, where in addition to pH, we can get analysis of macro- and microelements, as well as organic matter content.
Another method is using electronic pH meters. These devices are easy to use and provide quick results. The key is regular calibration of the meter.
Litmus paper strips are the simplest and cheapest method. We prepare a mixture of soil and distilled water, then immerse the strip and compare the color with the provided scale.
Moisture meters with pH function — some models offer additional pH measurement functionality alongside moisture measurement.
How to collect soil samples?
Proper soil pH testing starts with correct sample collection. For testing, several soil samples should be collected from different spots in the garden, at a depth of about 20 cm.
It is important to choose representative locations — avoid places near fences, paths, or compost piles. The collected samples should be mixed to obtain one average sample, which is then sent for analysis or tested on-site.
Also remember to avoid collecting samples right after fertilization or liming, as this may distort the results.
Summary
Proper monitoring and maintenance of optimal soil pH is crucial for the health and development of plants in our garden. Proper collection of soil samples and regular pH testing allow for maintaining the right soil conditions.
Regardless of the measurement method chosen — whether through a laboratory, an electronic meter, or litmus paper — the most important thing is regular and correct testing. Remember that soil is a living environment that changes, so regular pH monitoring helps us understand these changes and respond appropriately.
Summary
Regular soil pH testing is the foundation of effective fertilization and healthy plant growth. Results can be obtained using an electronic meter, litmus paper, or laboratory testing — the key is proper sample collection from several locations on the plot.