In English, "agriculture" includes the cultivation of both plants and animals for food. In some languages, a cognate such as "agricultura" (in Spanish) may contemplate only plants and exclude animals. What would be the equivalent expression in English -- could it be "crop farming" or "crop agriculture"? Also note: in such languages, a different term exists for the combination of plant and animal cultivation: "agropecuaria" (in Spanish).
It seems "plant agriculture" is not unheard of; see, for example:
- "Department of Plant Agriculture"
- "Plant agriculture: Readings from Scientific American"
- "Antibiotic Use in Plant Agriculture"
- "Plant Agriculture" and "Animal Agriculture"
Besides the ad hoc evidence of usage above, I've also found a definition:
Plant agriculture concerns the cultivation of useful plants.
The complementing term "animal agriculture" seems well established as a synonym or generalization of "animal husbandry":
- "Science of Animal Agriculture"
- "The Science of Animal Agriculture"
- "Animal Agriculture: Sustainability, Challenges and Innovations"
- "Animal Agriculture: The Biology, Husbandry, and Use of Domestic Animals"
The usage of both terms over the last century is also confirmed by the Google Books ngram graph.