Good weather conditions had helped Tunisia to yield 2.5 million tonnes of grain this year, marking the country's third biggest harvest over the last decade, official TAP news agency reported Saturday. 'Tunisia's cereal production rose to 2.5 million tonnes this year from 1.1 million tonnes in the previous one thanks to favorable weather conditions,' TAP quoted Agriculture Minister Abdessalem Mansour as saying. The northern African country aims at producing an annual average of 2.7 million tonnes of cereal over the coming three years. Agriculture represents 13 percent of the country's gross domestic product. 