Professor Biernbaum tried hoop houses on the Student Organic Farm at Michigan State and had success.

VOA: special.2009.12.22

Generally organic, it comes from organic farm where they practice sustainable,

一般来说，有机食物来自于有机农场，在那它们能实现可持续性，

吃有机食品 - SpeakingMax英语口语达人

Instead of this organic farm, the land here had been claimed by the desert.

VOA: standard.2009.12.10

He has a large organic farm in Adamstown,Maryland.

VOA: standard.2009.12.08