Figure 6: Field after being ploughed
|| • Both fields are ploughed
down to a depth of 25 cm.
A tractor must not drive over the lysimeter, only the plough
may move over the vessel.
As the soil is not homogeneous (see figure 6), the topsoil
around the lysimeter container has to be exchanged manually.
• Fields are harrowed and catch-crop (sunflower, vetch
and clover) is sown.
• Position of the vessel has to be determined.
• The mobile ring is put on the inner cylinder and surrounding
soil is dug away to remove the wooden ring between the outer
and inner cylinders.