Is it natural to use the possessive adjective in "their olive trees"?

Question

Does the following sentence sound natural? >1. They harvest their olive trees in autumn. Can I say: *their* olive trees or does it sound more natural without "their"? >2. They harvest olive trees in autumn.

Answer 1

"They harvest their trees in the fall" is quite normal----if for no other reason, it reduces ambiguity.

They harvest olive trees.

WHOSE olive trees???