AGROVOC

The nitrogen combined in organic molecules such as proteins, amines, and amino acids. (Cornell University. nd. Nutrient Management Spear Program. NITROGEN MANAGEMENT EVALUATION TOOL. Glossary. http://nmsp.cals.cornell.edu/NYOnFarmResearchPartnership/curriculum/Nitrogen/Nitrogen_Glossary.pdf)

Gelisols, one of the 12 soil orders in the U.S. Soil Taxonomy, are characterized by permafrost conditions. (BonaRes project)

In electrical engineering, impedance is the opposition to alternating current presented by the combined effect of resistance and reactance in a circuit. (https://en.wikipedia.org/wiki/Electrical_impedance)

Actual amount of product produced by an entity in a given time horizon. (AGROVOC Team, 2023)