The worldwide political discussion about food-prices and bioethanol from food crops (i.e.wheat,maize, sugarcane, etc.) makes it necessary to demonstrate and to prove that optimal concepts with these crops are able to produce economically and sustainably a multitude of biochemicals / biofuels (including bioethanol),as well as food and animal-fodder.It is possible that these optimal concepts can produce at least the same food value from the same agricultural area and in the same time various biochemicals in the same plant.These optimal concepts do not require changes on the agricultural side (except improvements in the yield of the crops)but increases the specific financial income for the available agriculture area considerable.When in the far future biochemicals can be produced at competitive cost from lignocellulosics raw materials then these processes can be integrated into the optimal processes describe.In the paper examples optimal concepts for starch containing crops and sugar containing crops will be shown.