Bad weather led to a 20 percent fall in coffee output in the 2014-15 crop in the domestic market, according to the Vietnam Coffee and Cacao Association.

Bad weather conditions are expected to continue until the early 2015-16 coffee crop, which can affect coffee cultivation and reduce the output of the next crop, the association noted.

Increase in the volume of old coffee trees is also a reason that will affect the output in the next crop, it said.

The decrease in coffee output in the 2014-15 crop has prompted farmers to stock their coffee and wait for an increase in price, reported the Nong nghiep (Agriculture) newspaper.

Therefore, coffee exports saw a reduction in the first four months to 465,000 tonnes, earning 968 million USD.

Coffee exports saw a year-on-year plunge of 41.8 percent in volume and 39.4 percent in volume, according to the General Department of Customs.

Meanwhile, the export price of coffee on the physical market is 150 USD per tonne higher than on the international trading floor, the association said, adding that the development will affect farmers' decision whether to sell or not.-VNA