To put it at the outset to make shortly. The Bodentesterset is simple but meaningful. Only for the implementation should be a little bit patient and calm. Approximately 10-15 minutes to complete it in order to capture the well explained description, then drizzle a little more patience when introducing the soil sample in the narrow glass tube, then apply it and measure. Is that done, you have to carefully work out the tablet from the blister (not rausdrücken like an aspirin, then crumble it), shake 2 minutes and then the result is visible. That is in spite of the simple color scale quite differentiated, showed my two different samples of the same lawn: soil sample from a small valley was green, so much sour / soil sample from a flat surface would light blue, ie slightly acidic. Hint: Carrying out several measurements, then the tube well to dry from the inside, otherwise it will be difficult to bring the earth. Did this time the product is not purchased from Amazon, because it made more sense because of the shipping costs to purchase it at the hardware store.