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Trafficability

The capacity of soil to carry machinery without significant damage to the soil or the vegetation growing on it.

Transpiration

The process whereby plants lose water by evaporation of liquid water at the surface of the stomatal cells, the water vapour diffusing out through the leaf via the stomata openings.

TRL

Technology Readiness Level. According to the EC 9 levels are distinguished: 1: basic principles observed; 2: technology concept formulated; 3: experimental proof of concept; 4: technology validated in lab; 5: technology validated in relevant environment (industrially relevant environment in the case of key enabling technologies); 6: technology demonstrated in relevant environment (industrially relevant environment in the case of key enabling technologies); 7: system prototype demonstration in operational environment; 8: system complete and qualified; 9: actual system proven in operational environment (competitive manufacturing in the case of key enabling technologies; or in space).

Trophic levels

Levels of the food chain. The first trophic level includes photosynthesizers that get energy from the sun. Organisms that eat photosynthesizers make up the second trophic level. Third trophic level organisms eat those in the second level, and so on. It is a simplified way of thinking of the food web. In fact, some organisms eat members of several trophic levels.

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