NOVELTY - Biomass which comprises active substance comprising carbon atoms having average oxidation state, inactive substance, biological catalyst comprising fermentation organism capable of converting the active substance into a renewable material and water, where the biomass is processed in absence of milling, and the biomass is suitably used in production of renewable materials.    USE - The biomass chosen from sugar beets, sugar cane, Jerusalem artichoke and lignocellulose, which is useful for producing renewable materials (all claimed) chosen from biofuels, biochemicals, biogas, amino acids, proteins, lipids, alcohols, esters and organic acids.    ADVANTAGE - The method prevents undesirable spoilage of metabolizable carbohydrates in cereal grains without need for forced air drying, and reduces time, energy and additional water needed to convert the cereal grains and sugar crops into economically desirable end product.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) feedstock for yeast fermentation comprising unmilled, whole kernel Zea mays (corn) which has initial water content of 22-25% and initial ethanol content E, obtained by inoculating X CFU Saccharomyces cerevisiae yeast/g unmilled, whole kernel corn, culturing the materials for 48 hours of harvest, performing fermentation using at least X CFU S.cerevisiae yeast/g for at least 51 hours to obtain fermented whole kernel Zea mays corn having final ethanol content F, and F is greater than E; and (2) method for producing stabilized biomass, involves (a) treating the above-mentioned unmilled biomass comprising water, active substance and inactive substance with biological catalyst, and converting at least a portion of the active substance having an initial average oxidation state into a renewable material containing carbon atoms having an average oxidation state less than the initial average oxidation state of the active substance, where at least a portion of the conversion of the active substance into the renewable material occurs inside the biomass, or (b) treating whole grain Z.mays (corn) comprising water, the active substance and inactive substance, with solution of S.cerevisiae yeast in water, within 48 hours of harvest, where the solution of S.cerevisiae yeast is capable of consuming at least portion of the active substance, and performing the above-mentioned converting step, and the whole grain corn has not been force-dried.