Eventually the fibers are separated from the interior woody pieces by scutching by passing the bundles through a number of fluted rollers and then past large revolving drums with projecting bars which remove any remaining pieces of wood. Yields and Economics Yields of hemp per hectare depend on climatic conditions, variety grown, soil and nutrition, and spacing of plants in the field. Usually the taller the plant, the longer will be the fiber with a greater yield per plant. France and West Germany are the chief importers, Italy and Yugoslavia exporters. Chile, China, Japan and Peru also produce hemp.
Narcotic production is usually clandestine, but there is legal marijuana production in India.
India is the main producer and exporter of oil from the seed. Energy In India, plants remaining in the field after harvesting for fiber are allowed to set seed. They are cut after the fruits are ripened and dried and threshed for seed collection. Occasionally Orobanche ramosa is paratitic on the roots. References Duke, J.A. 1978.