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" ... diversified in appearance and quality ; yet, as it was stated in the Introductory Lecture, they consist of different proportions of the same elements ; which are in various states of chemical combination, or mechanical mixture. The substances which... "
The Book of Wheat: An Economic History and Practical Manual of the Wheat ... - Página 125
por Peter Tracy Dondlinger - 1908 - 369 páginas
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Elements of Agricultural Chemistry: In a Course of Lectures for the Board of ...

Sir Humphry Davy, George Sinclair, John Russell Duke of Bedford - 1815 - 452 páginas
...combination, or mechanical mixture. The substances which constitute soils have been already mentioned. They are certain compounds of the earths, silica, lime, alumina, magnesia, and of the oxides of iron and manganesum; animal and vegetable matters in a decomposing state, and saline, acid or alkaline combinations....
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Repertory of Arts, Manufactures, and Agriculture: Consisting of Original ...

1816 - 442 páginas
...combination, or mechanical mixture. The substances which constitute soils have been already mentioned. They are certain compounds of the earths, silica, lime, alumina, magnesia, and of the oxides of iron an'd manganesum; and animal and vegetable matters in a decomposing stale, and saline, acid, or alkaline...
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An Encyclopaedia of Gardening, comprehending the theory and practice of ...

John Claudius Loudon - 1822 - 1494 páginas
...pronounced to be the better soil." 553. " The substances which constitute soils," Sir H. Davy observes, " are certain compounds of the earths, silica, lime, alumina, magnesia, and of the oxides of iron and manganesum ; and animal and vegetable matters in a decomposing state, and saline, *cid, or alkaline...
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The Circulator of useful knowledge, amusement, literature, science and ...

1825 - 424 páginas
...been so well illustrated by that distinguished agricultural chemist sir Humphry Davy, Soils are formed of the earths, silica, lime, alumina, magnesia," and 'of the oxides of iron and manganesum, animal and vegetable matters in a state of decomposition, and saline, acid, or alkaline...
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The Planter's Guide; Or A Practical Essay on the Best Method of Giving ...

Sir Henry STEUART - 1828 - 606 páginas
...attention, is the Preparation of the Soil. The substances which constitute Soils, as Sir H. Davy states, are certain compounds of the earths, silica, lime, alumina, magnesia, and of oxides of iron and manganesum ; also animal and vegetable matters in a decomposing state ; and saline,...
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The Planter's Guide: Or, A Practical Essay on the Best Method of Giving ...

Sir Henry Steuart - 1828 - 536 páginas
...attention, is the Preparation of the Soil. The substances which constitute Soils, as Sir H. Davy states, are certain compounds of the earths, silica, lime, alumina, magnesia, and of oxides of iron and manganesum ; also animal and vegetable matters in a decomposing state ; and saline,...
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The Planter's Guide: Or, A Practical Essay on the Best Method of Giving ...

Sir Henry Steuart - 1832 - 444 páginas
...attention, is the Preparation of the Soil. The substances which constitute Soils, as Sir H. Davy states, are certain compounds of the earths, silica, lime, alumina, magnesia, and of oxides of iron and manganesum ; also animal and vegetable matters in a decomposing state ; and saline,...
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Elements of Agricultural Chemistry: In a Course of Lectures for the Board of ...

Sir Humphry Davy - 1836 - 458 páginas
...combination, or mechanical mixture. The substances which constitute soils have been already mentioned. They are certain compounds of the earths, silica, lime, alumina, magnesia, and of the oxides of iron and manganesum ; animal and vegetable matters in a decomposing state, and saline, acid, or alkaline combinations....
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Yearbook of the United States Department of Agriculture

United States. Department of Agriculture - 1900 - 1020 páginas
...was understood at the beginning of the century, is furnished by Sir Humphry Davy.1 According to Davy the substances which constitute the soil "are certain...state, and saline, acid, or alkaline combinations." Minute descriptions are given of the various elements composing the soil, and for the most part these...
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Report of the Commissioner of Agriculture of the State of North Carolina

North Carolina. Dept. of Agriculture - 1901 - 990 páginas
...presented in his lectures before the Royal Agricultural Society of England in 1802. The substances of the soil "are certain compounds of the earths, silica, lime, alumina, magnesia, and of the exides of iron and magnesium; animal and vegetable matters in a decomposing state." "The ashes of plants...
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