P characterization in acid pasture soils and its relation with plant root systems and mineral composition

Abstract

Processes are very complex in the natural environment, so the effects of acidity on P soil dynamics cannot be considered in isolation. This paper attempts to show the different forms which this element can take in the soil: sorne insoluble phosphates can be slowly liberated into the soil labile P pool, and must also be considered a source of "available" P in acid media. Root length per soil volume (or root density) is also noted since root weight is not the best criterion when considering possible sources for plant mineral nutrition.