商业类搜索引擎及目录索引

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农业 Agriculture：

AgFind - Searches only Agricultural websites. "An agricultural search engine like no udder."

AgriBot - Canada's source for agriculture information

AgriSurf - Search over 14,340 sites about farming, agriculture and ranching.

AgPage: Farming the Net - Agricultural resource directory for agricultural producers with management, marketing and agronomic links and information, all organized in a common sense fashion.

Agriculture World - A portal which guides you through the world of the agriculture industry: tractors, seeds, cattle, fertilizers, poultry etc.

Agriscape - An online directory on agriculture and its surrounding industry. Links to companies, universities, publications, conferences, weather, news and more.

Agrolinks - Brazilian agriculture site directory. Agribusiness, news, forum, classifieds, auctions, and more.

Howdy Howdy Ag and Farm Search Engine - Agriculture farm directory and agricultural search engine.

Native Nursery - Directory covering subjects related to native Australian flora and the environment. Search the species list, locate suppliers and environmental projects, and more.

Worldwide Agriculture Machinery and Equipment - Find original equipment manufacturers in many categories.