I guess there are many, but could you cite some serious or replicable ones? Assuming that the area is totally unknown (no existing soil maps, no help from the farmers)...
For sure . First develop a soil resource inventory of that area using Soil Taxonomy , have limitations and merits worked out in relation to given crop sequence....
Thomas - I would recommend that you go and talk to the Soil Scientists in your University which absorbed remnants of the old Soil Survey and England and Wales (which existed in the days when UK governments thought this was important). If the location is in UK or Europe then there will be specific classification systems that apply to those locations and I would advise you to use those systems, rather than the US Soil taxonomy, to maximise the value of the information provided in your location. This is because you will be able to access and extrapolate data (behaviour/potential etc) from other locations on similar soil types. If the locations is in a country that does not have a well established classification system of its one - then US soil Taxonomy or the World Reference Base. A good place to start is the FAO portal which has links to National and International Systems see http://www.fao.org/soils-portal/soil-survey/soil-classification/en/