The project aims to study the long-term effect of structure liming, and to test if minimum tillage can prolong the duration of this effect. The hypothesis is that structure liming effects diminish over time, but by minimizing soil tillage we can prolong this effect. Studies will be performed in six field trials, which started in 2014-2018. Studies of soil tillage effects (shallow tillage vs chisel plough) will be tested in Krusenberg (Uppsala). This trial has 12 individually drained plots with automatic leachate sampling. Tillage treatments (Chisel plough to 15-20 cm vs shallow tillage to ca 5 cm) will be included as main treatment and liming as a sub-treatment. In this trial, we will analyze losses of phosphorous and soil particles in water samples collected from drainage pipes, quantify soil structure on undisturbed soil samples using X-ray tomography and determine soil susceptibility to compaction. In all six trials, we will measure aggregate stability using turbidimeter.