This is the large-display model in our soil nutrient range, showing nitrogen, phosphorus, potassium and soil temperature on one screen.
It suits growers who feed on a schedule and want to track how the reading changes after feeding. Take a reading before feeding and compare it with a later reading taken under similar soil conditions — the movement between the two is the useful part.
The nitrogen, phosphorus and potassium figures are calculated from soil conductivity rather than measured chemically, so read them as low, medium or high. If you need exact nutrient values for a fertiliser plan, use a laboratory soil test. Readings also shift with soil moisture, probe contact and temperature, so test under similar conditions each time if you want the numbers to be comparable.
Choose this model if you prefer a larger display with N, P, K and soil temperature shown together. If you want a smaller and more portable option for routine NPK trend checks, see our NPK soil tester.
Use in soil according to the preparation, insertion and reading instructions in the product manual.
Nitrogen is closely associated with vegetative growth and leaf development. This tester can help you compare estimated nitrogen readings under similar soil conditions and observe whether the trend changes after fertilizing.
Do not use one handheld reading as an exact fertilizer prescription. Crop requirements vary, and precise nutrient management should be based on an appropriate laboratory soil test.
Phosphorus plays important roles in plant energy processes, root development and reproduction. Use the tester to compare estimated phosphorus readings over time rather than treating one number as the ideal level for every crop.
If plant performance suggests a phosphorus problem and you need an application rate, confirm the nutrient status with a laboratory soil test.
Potassium is involved in water regulation and many plant physiological processes. The tester can help you compare estimated potassium trends under consistent testing conditions.
Avoid interpreting one handheld value as a universal target for tomatoes, fruit crops or other plants. Nutrient requirements depend on the crop, soil and growing system.
It displays estimated nitrogen, phosphorus and potassium values together with soil temperature. The NPK figures are conductivity-derived estimates designed for comparison and trend monitoring rather than laboratory nutrient analysis.
Both models are intended for monitoring estimated NPK trends. This version uses a larger display that shows N, P, K and soil temperature together, while the standard NPK soil tester is a smaller and more portable option for routine spot checks.
No. The displayed NPK values should not be used as exact nutrient concentrations or fertilizer-dose recommendations. Use repeated readings together with plant symptoms, feeding history and growing conditions. For precise nutrient levels or fertilizer recommendations, use a laboratory soil test.
Soil moisture, temperature, probe contact, soil type and the exact testing position can all affect the conductivity used to estimate NPK values. For better comparisons, test the same area under similar conditions and look at trends across multiple readings rather than relying on one measurement.
Compare estimated soil NPK trends and temperature in garden beds, containers and other growing areas.
Use repeated NPK estimates to compare soil nutrient trends in greenhouse and growing areas. For precise fertilizer programs, combine routine monitoring with laboratory soil testing.
Take readings before and after changes in fertilizer management and compare them under similar soil conditions to observe nutrient trends over time.
