Einfluss langjaehrig unterschiedlicher Bodenbearbeitungssysteme auf das Bodengefuege, die Wasserinfiltration und die Stoffverlagerung eines Loess- und eines Sandbodens

Abstract

Soil structure, water infiltration and displacement of bromide have been determined in loess and sandy soils in order to study the effect of soil tillage. The omission of soil tillages, especially in the case of loess soils, leads to the formation of a more dense soil structure with decreased water permeability. At the same time a greater number of biopores are formed, which increase the portion of macropore flow in the water infiltration during strong rainfalls. The preferential flow along macropores enhances transportation and leaching of groundwater contaminating substances only if these substances are dissolved in the rain water or are placed in an easy soluble form at the soil surface. Water soluble matters (e.g. fertilizers) within the soil matrix are not leached by the bypass-flow along the macropores and remain thus longer accessible for plant roots. (WEN)Available from TIB Hannover: RR 632(12) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman