Many other terrestrial biomass species have been proposed as renewable energy resources for their high-energy components that can be used as fuels, for the components capable of conversion to biofuels and chemicals, or for the con­tained energy (с/. Buchannan and Otey, 1978; Cherney et al, 1989; DeLong et al, 1995; Gavett, Van Dyne, and Blase, 1993; Klass, 1974; McLaughlin, Kingsolver, and Hoffmann, 1983; Nemethy, Otvos, and Calvin, 1981; O’Hair, 1982; Schneider, 1973; Shultz and Bragg, 1995; Stauffer, Chubey, and Dorell, 1981; Taylor, 1993). Among them are kenaf (Hibiscus cannabinus), an annual plant reproducing by seed only; sunflower (Helianthus annuus L.), an annual oil seed crop grown in several parts of North America; Eurphorbia lathyris, a sesquiterpene-containing plant species that grows in the semiarid climates of the Southwest and California; Buffalo gourd (Curcurbita foetidissima), a perennial root crop native to arid and semiarid regions of the southwest­ern United States; other root crops such as Jerusalem artichoke (Helian­thus tuberosus), fodder beet (Beta vulgaris), and cassava (Manihot esculenta); alfalfa (Medicago saliva), a perennial legume that grows well on good sites in many parts of North America; soybean (Glycine max) and rapeseed (Brassica campestris), oilseed crops that produce high-quality oil and protein; and many other biomass species that are potentially suitable as renewable energy resources or multipurpose crops including energy and biofuels. Kenaf, for example, is highly fibrous and exhibits rapid growth, high yields, and high cellulose content. It is a pulp crop and is several times more productive than pulpwood trees. Maximum economic growth usually occurs in less than 6 months, and consequently two croppings may be possible in certain regions of the United States. Without irrigation, heights of 4 to 5 meters are average in Florida and Louisiana, but 6-m plants have been observed under near-optimum growth conditions. Yields as high as 45 t/ha-year have been observed on experimental test plots in Florida, and it has been suggested that similar yields could be achieved in the Southwest with irrigation. Another example is the sunflower, which is a good candidate for biomass energy applica­tions too because of its rapid growth, wide adaptability, drought tolerance, short growing season, massive vegetative production, and adaptability to root harvesting. Dry yields have been projected to be as high as 34 t/ha per growing season. Rapeseed is another example; its seeds normally yield 38 to 44 wt % high quality protein and over 40 wt % oil, which affords high-quality biodiesel fuel at the rate of 750 to 900 L/ha-year on extraction and transesterification. Still another example is alfalfa, a well-known and widely-planted herbaceous crop that offers environmental and soil conservation advantages when grown as a 4-year segment in a 7-year rotation with corn and soybeans. With alfalfa yields of about 9 dry t/ha-year and the alfalfa leaf fraction sold as a high-value animal feed, the remaining alfalfa stem fraction can be used as feedstock for power production.