Soils

The major soil forming parameters are time, climate (temperature and precipitation) and parent signifi dissolvet (type and thickness) .. however, such things as slope, compass direction, or vegetation piece of ass make a substantial difference in the end-result soil. For instance, in your scenario, a sloped forested region will fix leaf litter. low sunlight and run-off as factors, while a grassy bit will have a ofttimes open, sunny domain with less natural run-off.

Parent hooey gives us the base of what the other factors have to work with, or the mineralogical substrate. This will be modified by the extant weathering processes and the build-up of radical weigh depending on what the local vegetative regime is. These can be broken down into the ii main stimulate classes of granitic versus basaltic - with the former tending to give high pH soils as the more acidic Basalts (all other things existence equal) [see Section V of the book in the references]

Of course, as noted in the text reference, parent material determines vegetation and vegetation drive part of the direction of formation - so the two are interconnected in a very first harmonic manner. Of course, many things CAN grow in the same soil, so the abundance of various plants does make a large difference.



For instance, apt(p) the same parent material in a broad-leaved forest versus a pine forest - the leafy matter in the deciduous forest leads to complex colloids and incorporation of oft organic matter into the A horizon usually braggart(a) us an alfisol, while coniferous leaf litter is much more acidic with phenolic compounds that immobilize Fe and Al and gives us grayish spodosols. However, if we were to move these same parent materials to tropic climates - the more rapid chemical reactions would likely give us an oxisol, while in an arid regime the lower reaction rates and lack of vegetation would likely lead to an inceptisol.

a brief USDA page
http://soils.usda.gov/education/facts/formation.html

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