They found that longer residence correlated with more adoption of improved plant varieties but less adoption of chemical herbicides.

他们发现，居住的时间越长，采用的改良植物品种越多，而使用的化学除草剂越少。

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In the state of Iowa, Diane Ott Whealy wanted to protect historic plant varieties, like the seeds her great-grandfather brought to the U.S. from Germany more than a hundred years ago.

在爱荷华州，黛安·奥特·惠利希望保护具有历史意义的植物品种，比如她的曾祖父100多年前从德国带到美国的种子。

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Every region has its success stories and its problem children with regard to the plant varieties installed in a project.

关于安装在一个项目中的植物品种，每个区域都有它的成功范例和问题案例。

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SEARCH, a non-profit body in Tucson, collects wild plant varieties, including rare or unknown chiles.

ECONOMIST: A brief history of chile cuisine

Collectively, CGIAR centres maintain 600, 000 plant varieties in crop genebanks in a global effort to conserve agricultural biodiversity.

BBC: Seeds destined for the 'doomsday' vault (Image: IITA)

Many of the old plant varieties found in the walled garden from the original estate were replanted and regrown.

FORBES: Connect