Globally, organic agricultural land increased significantly between 1999 and 2014 but not in Asia, including Viet Nam, meaning there is a lot of potential for the region to invest in it, he said.

Nguyen Ba Hung, general director of Organik Da Lat, said organic farming requires uncontaminated agricultural lands clearly separated from normal lands, the non-use of pesticides and chemicals and record-keeping to keep clear track of product flows.

His organic vegetable production can never meet demand and he would to like to tie up with other producers to expand, he said.

Deputy minister of Science and Technology Tran Quoc Khanh said food safety is a top concern for all of society, and organic agriculture plays an important role in ensuring this.

Organic farming is an inevitable trend globally since it helps increase productivity and farmers’ incomes and reduce greenhouse gas emissions and chemical contamination, he said.

In Viet Nam, organic agriculture is done on around 23,400ha or 0.2 per cent of the country’s total agricultural lands, he said.

There are some successful organic models such as Hoa Sua Foods organic rice brand by Ca Mau-based Vien Phu Organic and Healthy Foods Joint Stock Corporation, vegetable production by Organik Da Lat, a unique thick-skinned orange in Ham Yen, Tuyen Quang Province, and others.

Delegates at the seminar agreed that organic agriculture offers advantages like lack of pesticides residues, helping increase the value of agricultural and aquaculture products and having a greater likelihood of being accepted in choosy markets.

But companies in the field face many challenges, they said. For instance, there is no domestic certification organisation for organic products and growers have to depend on foreign organisations like Control Union, IMO and JAS, they pointed out.

Vo Minh Khai, president and CEO of Vien Phu Organic and Healthy Foods Joint Stock Corporation, said, "Government policies related to developing organic or climate-friendly agriculture are still not clear."

Besides, the standards for certifying produce as organic are not clear, he said.

There are too many kinds of production standards like VietGap, GlobalGap, Organic, Natural, CFA (climate friendly agriculture), he said, wondering what the differences between them are and saying official agencies should clarify.

The Government should have long-term policies to zone production areas for various kinds of produce to avoid contamination, he warned.

To develop sustainable agriculture, the Government should have transparent, clear policies that persuade farmers to switch gradually from chemicals-based farming to sustainable, climate-friendly agriculture to cope with international competition and safeguard the health of the community, he said.