. Florists' review [microform]. Floriculture. THE FLORIST ,<<^«^<»^<*^<*^<»^<<^<#^'fe»>-fef»'fer»)-fef»>'fer»>-fer»>^g ^ i SOME ELEMENTARY FACTS. [A paper by Harry F. Good, of SpringQeld, read before the Springfield Florists' Club, De- cember 11, 1911.] Soil consists of the disintegrated ma- terial of the hard crust of the earth, mixed with decayed vegetable matter. This disintegration is effected partly by the chemical action of oxygen, car- bonic acid and the other acid or alka- line substances brought by the atmos- phere to bear upon rocks, and par
. Florists' review [microform]. Floriculture. THE FLORIST ,<<^«^<»^<*^<*^<»^<<^<#^'fe»>-fef»'fer»)-fef»>'fer»>-fer»>^g ^ i SOME ELEMENTARY FACTS. [A paper by Harry F. Good, of SpringQeld, read before the Springfield Florists' Club, De- cember 11, 1911.] Soil consists of the disintegrated ma- terial of the hard crust of the earth, mixed with decayed vegetable matter. This disintegration is effected partly by the chemical action of oxygen, car- bonic acid and the other acid or alka- line substances brought by the atmos- phere to bear upon rocks, and partly by the wearing action of water in a fluid state or in the form of glaciers, or by its bursting force when frozen in deep clefts. Soils produced by running water, floods and tides, are found along the banks or at the mouths of rivers and are generally called alluvial soil. Those produced by glacial action are called drift soils. Both of these forms of soil are generally found at great distances from the rocks of whose disintegrated materials they are composed. By far the greater amount of soil has been formed by the weathering of rock under atmospheric influence and is gen- erally found close to or overlying the rocks from which it has been produced. Just beneath the stratum of earth which supplies nourishment to plant life is a mass of earth or rock which is unmixed with decayed vegetable matter and is known as subsoil. This subsoil may or may not be similar in its geolog- ical constitution to the soil, and, owing to the absence of vegetable matter, is generally lighter than the latter. Fertile Soils From Barren Bocks. Every species of rock has produced its soil, but the older formations, from their greater hardness and power to resist atmospheric action, produce, in proportion to their exposed surfaces, less soil than do the secondary or tertiary groups. The fertility of the soil has no rela- tion to the chronological succession of the strata of the earth's crust.
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