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Books Bücher 1 - 4 von 4 in ... matter. The earth would bear a constant succession of crops of the same kind,...
" ... matter. The earth would bear a constant succession of crops of the same kind, if the mineral ingredients removed by one crop were supplied in the same state from year to year. But this could only be done as the result of a nice calculation, and by... "
The Applications of Geology to the Arts and Manufactures: Being Six Lectures ... - Seite 27
von David Thomas Ansted - 1865 - 300 Seiten
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The Civil Engineer and Architect's Journal, Band 28

1865
...with it. The proper proportion of the various earths might vary from 50 to 70 per cent, of liliceoui matter, 20 to 40 per cent, of clay, and 10 to 20 per cent. of calcareoui matter. The earth would bear a constant succession of crops of the same kind, if the mineral...
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Journal of the Society of Arts, Band 13

1865
...improve the soil by mixture with it. The proper proportion of the various earths might vary from 60 to 70 per cent, of silicious matter, 20 to 40 per...clay, and 10 to 20 per cent, of calcareous matter. The earth would bear a constant succession of crops of the same kind, if the mineral ingredients removed...
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Economic Geology: Or, Geology in Its Relations to the Arts and Manufactures

David Page - 1874 - 336 Seiten
...not too much so : and, in case of need, the subsoil should be able to improve the soil by admixture with it. The proper proportion of the various earths...climate is wet or dry, the soil should be friable or porous, or adhesive and retentive, and the best soil is that which, in long drought, is never very...
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the farmers magazin

joseph rogerson - 1840
...inches, the constituent parts of a soil "ill then require to be from 50 to 70 per cent, of sand, 20 to 30 per cent, of clay, and 10 to 20 per cent, of calcareous matter. It will, however, be fouad that a very small proportion of the soils of Great Britain are naturally...
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