. The nature and properties of soils; a college text of edaphology. Soils. NATUEE AND PROPERTIES OF SOILS commonest sulfide of this element. Although sulfur is no more abundant in the average soil than phosphorus, it is generally not considered as an extremely important fertilizing constituent. It is interesting to note at this point the amounts of the above elements in ordinary mineral soils. Generally the nitro- % 3iQz BOA re^03'i'Al203— Na^O — m KgO 1-5 « CaO .61 KgO ^^51 PgOj SOj N i! 5% 10% 1^%. Fig. 2.—Chemical composition of a representative productive soil. gen (N) may range fro
. The nature and properties of soils; a college text of edaphology. Soils. NATUEE AND PROPERTIES OF SOILS commonest sulfide of this element. Although sulfur is no more abundant in the average soil than phosphorus, it is generally not considered as an extremely important fertilizing constituent. It is interesting to note at this point the amounts of the above elements in ordinary mineral soils. Generally the nitro- % 3iQz BOA re^03'i'Al203— Na^O — m KgO 1-5 « CaO .61 KgO ^^51 PgOj SOj N i! 5% 10% 1^%. Fig. 2.—Chemical composition of a representative productive soil. gen (N) may range from .1 to .2 per cent., the phosphoric acid (expressed as PgOg) from .05 to .30 per cent, and the potash (expressed as KgO) from to per cent. Of the plant nutrients in the soil nitrogen, although usually present in small quantities, is relatively more available than is phosphoric acid or even potash. Phosphoric acid may be in the minimum because of its unavailability as well as because of the small quantity. Potash is commonly present in rela-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lyon, T. L. (Thomas Lyttleton), 1869-1938; Buckman, Harry Oliver, 1883-. New York, Macmillan
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Keywords: ., bookauthorlyontlth, bookcentury1900, bookdecade1920, bookyear1922
