The countries rich soil and abundant water supply provide ideal conditions for growing rice. Thailand produces plenty of rice for it's people and has enough left over to be the worlds largest exporter of it. In addition to the rice fields, Thailand has an abundance of Mulberry trees, necessary for producing silk. Also in the south grow Rubber trees vital for the economy. Other crops produce a variety of tropical fruits including pineapples, oranges, grapes, melons, mangoes, papayas, and bananas. In addition to the preceding fruit widely known in the United States, they also grow fruits that are very rarely found here in the states except for in a few Asian markets. These fruits are lansata, rambutans, tamarinds, longans, mangosteens, jackfruits, durian, and sapodillas.