Found some more info about the top soil and it seems like some unknown animal manure have been added to this soil too. Interesting, when comparing ingredients between the soils we can see that the oslo soil (ammonium/nitrate PK = 21,8 mg/L - 217 mg/g - 754 mg/g) contain much more NPK nutrition than e.g. top soil (ammonium/nitrate PK = 19,81 mg/L - 21,7 mg/g - 100 mg/g). Numbers for the tiger soil would be = 13,23mg/L - 4,2 mg/g? - 1200 mg/g?. So, how would you choose between these? Very high amounts of Mg and Ca would maybe be a problem in the oslo soil? Top soil, oslo soil and tiger soil are all without peat and at least oslo and top soil have been produced by a hot composting process. Unfortunate, I do not know the amount of organic content in these soils.
Dwalstad mentioned forest or agricultural soil with 5-10% organic matter. I have access to both in some way, but how do I choose between the different types of e.g. forest soil. Would I choose the soil found in spruce woods, beech forest, pine forest, birch forest, flower meadow etc? A problem with agricultural soil found outside is that you have no idea what the farmer have used to fertilize it.
Dwalstad mentioned forest or agricultural soil with 5-10% organic matter. I have access to both in some way, but how do I choose between the different types of e.g. forest soil. Would I choose the soil found in spruce woods, beech forest, pine forest, birch forest, flower meadow etc? A problem with agricultural soil found outside is that you have no idea what the farmer have used to fertilize it.
I would take the most "simple" soil I could find - ordinary potting mix with no wetting additives and call it a day. You could also do an experiment with a couple of bigger jars (~5-10l) and use different soil in each to see how they behave.. 
