Scientific glossaryWitness plantOrigin: Yolia's safe educational catalogExact route: /biblioteca?ruta=glosario/testigo FULL TOPICWitness plant Easy explanation It is a plant or a group of plants used as a comparison reference against another that received different management. It helps determine whether an observed change is really due to that intervention. Without this point of comparison, it would be hard to tell cause from coincidence. Medium explanation It helps determine whether an observed change also occurred without the same intervention or condition applied to the other plant. Yolia considers it when evaluating whether a specific action actually had the effect expected of it. Without it, any reading loses solidity. Advanced explanation A control intended to reduce causal confusion between what actually caused an effect and what merely coincided with it; its validity depends on baseline similarity, management, and tracking quality. Without a good control, it is easy to confuse a real effect with a coincidence.