坊間有許多不同的認證，認證標準當然也不盡相同。一般來說，有機認證的條件如下：

• 避免使用合成化學藥物，包括殺蟲劑、除草劑、化學肥料、抗生素、荷爾蒙及其他化學藥物。
  
• 鼓勵採取自然的方式及步驟，不過，允許有限度地使用被認可的物質，以處理特殊的問題。
  
• 不許產生污水及污穢沈澱物（生物性廢棄物）。
  
• 不許放射線照射的處理方式。
  
• 不許基因改造生物。
  
• 不允許非有機來源的堆肥或糞肥。
  
• 鼓勵動植物輪作及多樣性培育。
  
• 認證之土地必須是數年之前即完全無化學藥物污染。
  
• 養殖類動物必須餵食天然或有機飼料。
  
• 有機與非有機類產品必須分開來生產製造、儲藏及販售。

更多關於有機認證: http://hk.chopsticks-co.com/zh/article/article_id/9

有機認證連結
http://organic.com.au/certify/ 此網址可連結至全球各地的認證機關。
http://organic.com.au/standards/ 此網址可連結至符合有機認證的標準。

As we know there are many different certifiers. And of course they differ in their requirements. In general terms they require:

• Avoiding the use of synthetic chemical inputs. These include chemicals such as pesticides, herbicides, fertilizers, antibiotics, hormones and others.
  
• Natural treatments and procedures are encouraged. When these are not sufficient a limited use of approved substances may be used to treat a specific problem.
  
• Sewage sludge (biosolids) is not permitted
  
• Irradiation treatment is not permitted.
  
• Genetically modified organisms are not permitted.
  
• Non-organic sources of compost or manure are not permitted.
  
• Crop/animal rotation and diversity are encouraged.
  
• Land must be ‘chemical-free’ for a number of years before certification.
  
• Animal feed should be natural or organic.
  
• Organic and non-organic products must be produced, stored and sold separately.

Details about organic certification: http://hk.chopsticks-co.com/en/article/article_id/9

The Organic Certifiers
http://organic.com.au/certify/ This site has links to many of the certifying organizations around the world.
http://organic.com.au/standards/ has links to the standards required to achieve certification.