The main secondary crops in the late 1980s were maize, cassava, sweet potatoes, groundnuts, soybeans, dry beans, and rubber. According to Phnom Penh, the nation produced 92,100 tons of corn, as well as 100,200 tons of cassava, about 34,050 tons of sweet potatoes, and 37,300 tons of dry beans in 1986. In 1987 local officials urged residents of the different agricultural regions of the nation to step up the cultivation of subsidiary food crops, particularly of starchy crops, to make up for the rice deficit caused by a severe drought.

The principal commercial crop is rubber. In the 1980s, it was an valuable primary commodity, second only to rice, and one of the nation's few sources of foreign exchange. Rubber plantations were damaged considerablely during the war, and recovery was very slow. In 1986 rubber production totaled about 24,500 tons, far below the 1969 prewar output of 50,000 tons.