truck farming vs agriculture

truck farming and agriculture both are nouns.

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

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

Other hypernyms of truck farming include farming, husbandry.

truck farming (noun)	agriculture (noun)
growing vegetables for the market	the practice of cultivating the land or raising stock
	a large-scale farming enterprise
	the class of people engaged in growing food