PURPOSE:To contrive to increase yield of the titled plants, by applying yeast containing ribonucleic acid (decomposition product) and proline. CONSTITUTION:Yeast containing 10-40% ribonucleic acid or ribonucleic acid decomposition product and proline or a blend of a decomposition product obtained by treating yeast with a yeast cell wall decomposing enzyme and protease and 0.5-20% proline and 0.5-20% uracil is applied to rice plants in a period from panicle formation stage to heading or to fruits and vegetables, edible roots, flowers and ornamental plants or fruits trees as a fertilizer to increase yield of plants.
