As to the forest: if it is extensively felled and birch allowed to grow in its place, then grass will grow better; but where the soil is sour because of the underlying rock, things will become even worse. The sandy heaths are worst of all because, wherever the forest is burned off, only the sand remains and nothing will grow on it for up to 10 or 20 years. It is worth asking whether the forest, if it was felled more and left lying to cover the ground and rot away gradually, might possibly convert into humus. They sow buckwheat on the sand in Skane but that cannot be sown here because of the winter and the cold. It is worth investigating how moss can be eradicated.