drip culture vs tank farming

drip culture and tank farming both are nouns.

Word	Noun	Adjective	Verb	Adverb
drip culture	Yes	No	No	No
tank farming	Yes	No	No	No

As nouns, tank farming is a hypernym of drip culture; that is, tank farming is a word with a broader meaning than drip culture:

drip culture: a hydroponic method of growing plants by allowing nutrient solutions to drip slowly onto an inert medium in which the plants are growing
tank farming: a technique of growing plants (without soil) in water containing dissolved nutrients

Other hypernyms of drip culture include aquiculture, hydroponics.

drip culture (noun)	tank farming (noun)
a hydroponic method of growing plants by allowing nutrient solutions to drip slowly onto an inert medium in which the plants are growing	a technique of growing plants (without soil) in water containing dissolved nutrients