Test your soil at home with this Rapitest Soil Test Kit. Test for nitrogen (N), phosphorus (P), potassium (K), and soil acidity (pH). This kit includes 10 tests each for all four different types of test. It's not quite as exact as sending a sample to a lab, but will give a pretty good assessment of these important soil properties. This item comes in a package that measures 13cm wide x 5cm tall x 16cm long.