mixed farming vs agriculture

mixed farming and agriculture both are nouns.

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

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

Other hypernyms of mixed farming include farming, husbandry.

mixed farming (noun)	agriculture (noun)
growing crops and feed and livestock all on the same farm	the practice of cultivating the land or raising stock
	a large-scale farming enterprise
	the class of people engaged in growing food