Hanna HI-3896 Soil test kit for the professional

This soil kit is extremely easy to use and includes everything you need to measure the four main parameters necessary for strong plant growth. Nitrogen, Phosphorous, Potassium and pH, they can all be measured with this kit, simply take a sample of the soil, dilute in water and then add the supplied chemical reagent. The result is a coloured solution which is compared to the chart provided to determine the concentration of the element tested.