NOVELTY - Production of bioethanol from sugar or grain bearing plants, comprises growing the plants on many of plots of land, planting the plants sequentially such that when a plot of land is planted, the plants in another plot of land are ready for harvesting and supplying the material from harvested plants to bioethanol production plant or either staggering the planting and harvesting the plants, and supplying the material to bioethanol production plant; or growing plants in plots of land, providing material to bioethanol production plant and subjecting material to bioethanol production process.    USE - The bioethanol is useful as transport fuel.    ADVANTAGE - The bioethanol is stable and non-toxic. The process produced high yield of bioethanol.    DETAILED DESCRIPTION - Production of bioethanol from sugar or grain bearing plants, comprises growing the plants on a many of plots of land, planting the plants sequentially such that when a plot of land is planted, the plants in another plot of land are ready for harvesting, and supplying material from the harvested plants to a bioethanol production plant or either staggering the planting and harvesting the plants so that the plants are grown and harvested substantially throughout the year, and supplying material from the harvested plants to a bioethanol production plant; or growing sugar or grain bearing plants in plots of land adjacent to bioethanol production plant, providing freshly harvested plant material to the bioethanol production plant and subjecting the freshly harvested plant material to a bioethanol production process. INDEPENDENT CLAIMS are included for: (a) a method of cultivating sweet Sorghum, where under certain climatic conditions sweet Sorghum is grown all year round in a manner and enough fresh sweet Sorghum available every day to meet the sugar and lignocellulose feedstock requirements of a bioethanol production process located adjacent to the sweet Sorghum plantations, and effluent water rich in plant nutrients from the bioethanol process, which is to promote the growth of more sweet Sorghum in the plantations; (b) a method of irrigating or fertilizing plants comprising supplying the plants with effluent water from a bioethanol production process; (c) a system for producing bioethanol, comprising a bioethanol production plant and many of plots of land which have been planted sequentially with sugar or grain bearing plants to include a newly planted plot of land and a plot of land which is ready for harvesting substantially all year around; (d) a combined system of cultivating sweet Sorghum and producing bioethanol comprising a number of cultivation units containing a multiplicity of cultivatable plots of land planted sequentially with sweet Sorghum so that the sweet Sorghum on one plot of land in each cultivation unit will reach maturity every day and provide a source of fresh sugar and lignocellulose material for the bioethanol production process; and (e) a system for irrigating plants or fertilizing plants comprising a bioethanol production plant, at least one plot of land for growing the plants, and an irrigation system for supplying the plot of land with effluent water rich in plant nutrients from the bioethanol production plant.