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Caption: Booklet - Addresses from Inauguration of Noyes
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5 1. The chemical composition o\ agricultural products, including the ash or mineral ingredients. 2. The chemical composition of soils showing that the soil contains certain elements which serve as plant food and without which vegetable growth is impossible. 3. The establishment of the fact that the most important of the ingredients of plant food, ?'. (\, those which furnish the bulk of the ash of agricultural crops, and contained in the soil in comparatively small quantities, that they are present in two forms, available and reserve plant food, that the immediate fertility of soils depends upon the former, and that by continuous cropping without application of fertilizing materials to the soil this available plant food is gradually exhausted, until maximum or even average crops can no longer be produced. 4. The important observation that if only one of the essential elements of plant food is wanting in the soil, while all others are present in ample quantities, plants will refuse to grow. 5. The devising of methods by which the wanting ingredients of plant food can be definitely determined in an exhausted soil, so that the loss of money and labor in applying fertilizers, which would have no % beneficial effect upon the production of crops, can be avoided. 6. The discovery and analysis of natural posits Of plant food, as (iuano, Chili saltpeter, Stasfurt salts, apatites, eoprolites limestones rich in phosphates, eta, as well as Mir analysis of iiiiiiicrmi waste products ind 1). produH such as hones, blood, tank e, nil m ils, wood ashes, et < all of which
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