He is a specialist in that field.

He is an expert in pomology and is researching the cultivation methods of many fruits.

He spends a lot of time studying.

He reads a lot of books.

Please tell me the way to solve this problem.

My hobby is cultivating tomatoes.

I am cultivating vegetables in my garden.

I eat fresh fruit every day.

This fruit is very rare, and it's hard to find.

This fruit is very sweet.