tank farming vs husbandry

tank farming and husbandry both are nouns.

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

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

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

Other hypernyms of tank farming include agriculture, farming.

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