Strukturkalkningens effekt beroende på spridningstidpunkt, inblandningsdjup och kalkgiva

Sammanfattning: Structural liming is something that will positively affect the hard clay soil in theory. This work should demonstrate that it is also so in practice. The purpose of this work was to study the effect on soil struc-ture after spreading structure lime at different time, different incorporation depths and different rates. In this examination work there has been two different field trials from Local Water Conservation Pro-ject (LOVA), that are spread out in Skåne, Sweden. LOVA 15 attempt is based on comparing what meaning different incorporation depths and different spreading times has on the structure effect of the lime. LOVA 14 compares different liming rates to see if there is any difference correlated to the different amounts. This may be interesting, for example, from an economical perspective for the farmer. LOVA 14 also has a “zero box” (a box in the trial without liming) to really see that the lime is useful. The results are varied, but overall, one can say that the structure lime has the effect that was suspected when the trials started, meaning that the higher rate of structure lime in LOVA 14 resulted in lower turbidity and higher electric conductivity. In LOVA 15, there was no result in the trials for different depths, but in the time trials it was lower turbidity and higher electric conductivity for the early treat-ment. However, the probability values for the various trials for turbidity, electric conductivity, anal-yses and seedbed survey vary and are often not significant. Perhaps more significant results had been obtained if the experiment was made on a larger scale.