This gives the levels of the three main minerals within the soil that impact on plant growth and health. A soil pH reading is also given. For information on nutrient levels see this webpage http://www.completegardenguide.com/soil_nutrients.html
Contaminant tests are required for a range of purposes. They are often required by Local Authorities as part of the planning application process, to ensure that any land being disturbed by building works does not have high levels of contaminants. The levels of contaminants considered safe in a soil varies according to the use of that soil, for example, whether it is for growing vegetables, building, or commercial use.
Physical tests examine the distribution of different soil particle sizes in order to ascertain soil type e.g. clay, sandy loam. This, in turn, affects the types of plants that can be grown due as well as factors such as drainage. Occasionally physical tests are requested as part of the planning process in order to ascertain how the soil will withstand the forces of any structures on it. The following link gives some basic information on soil structure http://www.completegardenguide.com/garden_soil.html
This test combines the preceding three tests with a cost saving
BS Certification is sometimes requested of topsoil suppliers. BS Standards test the quality of topsoil; the test includes nutrient levels, some contaminant testing (hydrocarbons only) and physical analysis (although the test results include raw data rather than interpreted results as in the full physical analysis).