The North Korean famine that occurred from 1994 to 1998

What are some of the major causes of the famine in North Korea?
The famine in DPRK is the result of the cumulative effects of a fractured economic infrastructure and inadequate food production. Over 22 million people must rely on food produced from the barely 20 per cent of arable land available. This has led, with unfortunate consequences, to planting crops on steep hillsides, destroying the forest cover and causing erosion.