topsoil
The top 20 to 30 centimetres of soil form the topsoil.
Glossary
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tongue and groove rough boards
Boards planed on the front, levelled on the back and edged on the sides, which have tongue and groove joints.
thickness growth
The stem of a plant not only grows in length, but also in girth. This increases the stability of the plant on the one hand and improves the transport capacity on the other.
troposphere
The troposphere is the layer of the earth’s atmosphere closest to the ground. Most of the weather occurs in this layer.
thermohaline circulation
In the thermohaline circulation, four of the five oceans are connected by ocean currents. The circulation is caused by differences in temperature and salt.
transpiration
In botany, transpiration describes the evaporation of water through the leaves of plants.