Cultivation and drainage are usually the first operations carried out to prepare a site for planting. Their effect is to create a favorable planting site for new transplants by loosening compacted soil, removing surface water and creating a raised planting position to lessen the effect of competing vegetation. A kaivukatko is a 10-30 meter long unexcavated part left in the forest, which prevents corrosion and the transport of sludge with the water.