Export of cassava and cassava products plunged by 18.2 percent to 1.1 billion USD last year, according to the General Department of Customs.

Volumes were down almost 30 percent to 3.1 million tonnes.

China bought almost the entire bulk for 847.9 million USD.

Vietnam was the second largest cassava exporter last year behind Thailand.

Over the recent years, cassava has become one of the products with high export value, according to the Ministry of Agriculture and Rural Development.

The export of cassava and cassava products was worth 952 million USD in 2011, a whopping 70 percent rise from 2010, and it went up by another 41 percent in 2012.

Cassava and cassava products were the seventh largest export staple in 2013.

Vietnam has 560,000ha under cassava cultivation and the output last year was 9.4 million tonnes. Around half of it is consumed domestically.

In the 2001-11 period, the area under cassava increased by an average of 6 percent a year.

Vietnam's yield is 17.6 tonnes per hectare, or the world's 10th highest.-VNA