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Example Sentences for "calcareous "

" The Tuberacei are subterraneous, with a preference for calcareous districts.

[I] The most successful plan consists in sowing acorns over a considerable extent of land of a calcareous nature; and when the young oaks have attained the age of ten or twelve years, truffles are found in the intervals between the trees.

The proportion of these substances is liable to very great variations, and in some soils of excellent quality, and well adapted to the growth of wheat, it does not exceed 3 per cent; while in calcareous soils, such as those of the chalk formation, it may reach as much as 50 or 60 per cent.

As an example of a calcareous soil, forming a striking contrast to those given above, we select one from the island of Antigua, from which very large crops of sugar-cane are obtained.

He used also a heavy clay consisting of 11 per cent of sand and 89 of pure clay, a somewhat stiff clay containing 24 per cent of sand and 76 of clay, a light clay with 40 per cent of sand and 60 of pure clay, a garden soil consisting of 52�4 per cent of clay, 36�5 of siliceous sand, 1�8 of calcareous sand, 2 per cent of finely divided carbonate of lime, and 7�2 of humus, and two arable soils, one from Hoffwyl, and one from a valley in the Jura, the former a somewhat stiff, the latter a light soil.

Siliceous sand 2�753 25 88�4 0�0 Calcareous sand 2�822 29 75�9 0�0 Light clay 2�701 40 52�0 6�0 Stiff clay 2�652 50 45�7 8�9 Heavy clay 2�603 61 34�9 11�4 Pure clay 2�591 70 31�3 18�3 Carbonate of lime 2�468 85 28�0 5�0 Humus 1�225 190 20�5 20�0 Gypsum 2�358 27 71�7 0�0 Garden soil 2�332 96 24�5 14�9 Soil from Hoffwyl 2�401 52 32�0 12�0 Soil from Jura 2�526 47 40�1 9�5 Quantity of hygrometric water absorbed by 77�165 grains of the soil spread on a surface of 141�48 square inches.

Siliceous sand 0 0 0 0 95�6 Calcareous sand 0�154 0�231 0�231 0�231 100�0 Light clay 1�617 2�002 2�156 2�156 76�9 Stiff clay 1�925 2�310 2�618 2�695 71�1 Heavy clay 2�310 2�772 3�080 3�157 68�4 Pure clay 2�849 3�234 3�696 3�773 66�7 Carbonate of lime 2�002 2�387 2�695 2�695 61�8 Humus 6�160 7�469 8�470 9�240 49�0 Gypsum 0�077 0�077 0�077 0�077 73�2 Garden soil 2�695 3�465 3�850 4�004 64�8 Soil from Hoffwyl 1�232 1�771 1�771 1�771 70�1 Soil from Jura 1�078 1�463 1�540 1�540 74�3 Tenacity of the soils.

Siliceous sand 0 0�24 Calcareous sand 0 0�84 Light clay 57�3 1�39 Stiff clay 68�8 1�65 Heavy clay 83�3 2�04 Pure clay 100�0 2�29 Carbonate of lime 5�0 1�62 Humus 8�7 3�04 Gypsum 7�3 0�40 Garden soil 7�6 2�60 Soil from Hoffwyl 33�0 2�43 Soil from Jura 22�0 2�25 [Pg 130] The experiments detailed in the preceding table speak in a great measure for themselves, and scarcely require detailed comment.

He found in a particular year that, on the 25th of August, 26 varieties of potatoes were ripe on a very dark-coloured sandy vegetable mould, 20 on an ordinary sandy soil, 19 on a loamy soil, and only 16 on a nearly white calcareous soil.

Siliceous sand 99�1 112�6 Calcareous sand 99�3 112�1 Sandy clay 98�2 111�4 Loamy clay 99�1 112�1 Stiff clay 99�3 112�3 Fine bluish-grey clay 99�5 113�0 Garden mould 99�5 113�5 Arable soil 97�7 111�7 Slaty marl 101�8 115�3 In a soil which is naturally dry or has been drained, the superfluous moisture escapes by the drains, and only that comparatively small quantity which is retained by capillary attraction is evaporated, and hence the soil is more frequently and for a longer period in a condition to take advantage of the heating effect of the sun's rays, and in this way the period of germination, and, by consequence also, that of ripening is advanced.

Experience has shown that burning is by no means equally advantageous to all clays, but is most beneficial on those containing a considerable quantity of calcareous matter, and of silicates of potash.

"" Remains of thousands of species of animals and plants, as perfectly recognisable as those of existing forms of life which you meet with in museums, or as the shells which you pick up upon the sea-beech, have been imbedded in the ancient sands, or muds, or limestones, just as they are being imbedded now, in sandy, or clayey, or calcareous subaqueous deposits.

These so-called slates are composed of a fine grained calcareous mud which has hardened into lithographic stone, and in which organic remains are almost as well preserved as they would be if they had been imbedded in so much plaster of Paris.

On pure sand, on calcareous soil, on naked rocks, only a few genera of plants prosper, and these are, for the most part, perennial plants.

Cesnola has made some of his interesting excavations on this spot, and I will therefore explain these strange workings, in the solid sandstone, in his own words: �A little to the north-east, and half-way between these ruins and Ktima, there is a rocky eminence sloping towards the sea, and called Pal�o Castro, the surface of which is perforated with thousands of ancient tombs, some cut vertically, and others horizontally, in the calcareous rock.

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