tank farming vs agriculture

tank farming and agriculture both are nouns.

Word	Noun	Adjective	Verb	Adverb
tank farming	Yes	No	No	No
agriculture	Yes	No	No	No

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

tank farming: a technique of growing plants (without soil) in water containing dissolved nutrients
agriculture: the practice of cultivating the land or raising stock

Other hypernyms of tank farming include farming, husbandry.

tank farming (noun)	agriculture (noun)
a technique of growing plants (without soil) in water containing dissolved nutrients	the practice of cultivating the land or raising stock
	a large-scale farming enterprise
	the class of people engaged in growing food