Since soils are derivatives of the existent geology, there is bound to be variations not only at the macro but even at micro levels. Although, macro is addressed generally, micromorphological understanding of soils presents complex process of nutrient potential and growth of either plants or agricultural produce. Better understanding would further facilitate appropriate planning.
Soil micromorphology, involving the examination of thin sections of soils under a polarizing microscope, provides important and unique information that can aid in the identification of buried soils and also their interpretation in terms of pedogenic processes and environmental controls.
In a relatively recently published book (Reading the Soil Archives, edited by van Mourik and van der Meer), there is an up-to-date chapter on Soil Micromorphology. Coincidentally, this is one of the chapters that can be 'Google previewed'.