<P> Alongside cassava, rice is the staple food of the republic, with 238,000 tonnes produced in 2013 . The foodstuff accounts for 22% of agricultural GDP, far higher than all livestock . However, the harvest still falls short of 1988 levels which were 299,000 tonnes even though the population has doubled . Yields are also low with most rice at 3 tonnes per hectare, less than half the average in the United States . </P> <P> In 1979, rice riots resulted in the destruction of $40 million worth of private property . Forty people were killed and 500 wounded . In the wake of the Ebola virus epidemic in West Africa, rice production has shifted away from the traditional' breadbasket' Lofa, Nimba and Bong Counties to the south east following irrigation investment which tripled yields . The epidemic has also caused large price rises and overgrown rice fields, causing the government to declare a state of emergency . </P> <P> Liberia has over 230 species of tree and 14 million acres of forest . Its tropical hardwoods are valuable, chiefly in luxury furniture abroad . The largest firm in the sector is the Indonesian - owned Oriental Timber Corporation, with about three million acres and it has invested over $100 million in sawmills . </P> <P> The rubber industry was born in the country when Hilary R.W. Johnson, the president, permitted a British firm to extract wild latex in 1890 . Liberia Rubber Corporation, another British corporation, built a plantation at Mount Barclay two decades later, but both failed in their endeavours . </P>

State the different kinds of crops in liberia agriculture