CEA DEFINITIONS AND BIOLOGY

Understanding the Language of CEA

Glossary for CEA Terms

Explore Greenhub’s cross-disciplinary glossary of Controlled Environment Agriculture (CEA) — a growing knowledge base for greenhouse growers, indoor farm managers, researchers, breeders, and agtech innovators. Here you’ll find concise definitions of key vertical farming and plant science terms that help create a shared language across the CEA industry.

N

Nanobubbles / Microbubbles

Extremely small gas bubbles suspended in water that enhance dissolved oxygen, CO₂ delivery, and nutrient...

NDVI

Vegetation index from NIR/red reflectance. NDVI = Normalized Difference Vegetation Index

Near-Infrared (NIR)

Assesses water status.  

NFT (Nutrient Film Technique)

Roots exposed to a thin, recirculating nutrient film. 

Nutrient Balance

Delivered vs. absorbed nutrients. (Digital Control & Software Metrics)

Nutrient Deficiency

Lack of essential nutrients; visible as chlorosis, necrosis, poor growth. 

Nutrient Toxicity

Excess nutrients causing damage. 

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