Handbook of Experiment Station Work: A Popular Digest of the Publications of the Agricultural Experiment Stations in the United States

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U.S. Government Printing Office, 1893 - 411 páginas
 

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Página 9 - Territory shall be twenty-five thousand dollars, to be applied only to instruction in agriculture, the mechanic arts, the English language and the various branches of mathematical, physical, natural and economic science, with special reference to their applications in the industries of life, and to the facilities for such instruction...
Página 139 - ... substances, nitrogen, phosphoric acid and potash, which are comparatively costly and steady in price. The trade-value per pound of these ingredients is reckoned from the current market prices of the standard articles which furnish them to commerce.
Página 139 - ... of good quality) of an amount of nitrogen, phosphoric acid and potash equal to that contained in one ton of the fertilizer. Plaster, lime, stable manure and nearly all of the less expensive fertilizers have variable prices, which bear no close relation to their chemical composition, but guanos, superphosphates and similar articles, for which...
Página 139 - ... are deduced from different data. Experience leads to the conclusion that the trade-values adopted at the beginning of a year should be adhered to as nearly as possible throughout the year, notice being taken of considerable changes in the market, in order that due allowance may be made therefor. The Agricultural value of a fertilizer is measured by the benefit received from its use, and depends upon its fertilizing effect, or crop-producing power. As a broad, general rule, it is true that Peruvian...
Página 134 - Superphosphates, in which it is produced, by acting on " insoluble " or " reverted " phosphates, with diluted sulphuric acid (oil of vitriol). Once well incorporated with the soil, it gradually becomes reverted phosphoric acid. Reverted (reduced or precipitated) Phosphoric acid means strictly, phosphoric acid that was once easily soluble in water, but from chemical change has become insoluble in that liquid. In present usage the term signifies the phosphoric acid (of various phosphates) that is freely...
Página 381 - The best trees for windbreaks in the North-eastern States are Norway spruce, and Austrian and Scotch pines, among the evergreens. Among deciduous trees, most of the rapidly growing native species are useful.
Página 213 - ... This has been shown to be accomplished best by two precautions, absolute cleanliness and low temperatures. The great source of these organisms is in the unclean vessels in which the milk is drawn and in the filth which surrounds the cow. By scrupulous cleanliness in the barn and dairy the number of organisms which get into the milk may be kept comparatively small. Of equal value in preserving milk is the use of low temperature, and to be of the most use it should be applied immediately after...
Página 311 - Shales (Hamilton, etc.) 18,295,000,000 288. Helderberg limestone 19,638,000,000 .... Trenton chazy limestone 24,653,000,000 From the mechanical analysis of the samples which were used to make up these type samples and perhaps of a large number of other soils of known agricultural value, it should be possible to determine the smallest and the largest number of grains per gram of soil -where these different crops could be successfully grown. For example, no crop can be successfully grown except under...
Página 8 - In each of the states of Alabama, Connecticut, New Jersey, and New York a separate station is maintained wholly or in part by state funds, and in Louisiana a station for sugar experiments is maintained partly by funds contributed by sugar planters. Excluding the branch stations established in several states, the total number of stations in the United States is 54.
Página 311 - The relation of geology to agriculture (pp. 261-264). — General statements regarding the geological formations in Maryland, bringing out the fact that " the texture or the relative amount of sand and clay contained in the soil resulting from the disintegration of rocks will depend upon the kind of rock, that is, upon the minerals of which it is composed.

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