The most important elements for soil fertility are Nitrogen (N), Phosphorus (P) and Potassium (K), also known as NPK for short. So to get a good impression of the fertilisation level of the soil, you need to be able to measure these 3 elements.
This digital NPK (Nitrogen, Phosphorus and Potassium) soil meter with large LCD screen is capable of doing just that and also measures temperature.
