. The chemistry of soils and fertilizers. Soils; Fertilizers. 26 SOILS AND FERTILIZERS the capacity of the soil for storing up water and giving it up as needed is a matter to be considered, par- ticularly since the power of the soil for absorbing and retaining water ma}- be influenced by cultivation 'and manuring. Before discussing the influence of cultivation upon the soil water, the forms in wdiich it is present in the soil should be studied. Water is present in soils in three forms : (i) bottom water, (2) capillary water, and (3) hydroscopic water. 19. Bottom Water is water which stands in
. The chemistry of soils and fertilizers. Soils; Fertilizers. 26 SOILS AND FERTILIZERS the capacity of the soil for storing up water and giving it up as needed is a matter to be considered, par- ticularly since the power of the soil for absorbing and retaining water ma}- be influenced by cultivation 'and manuring. Before discussing the influence of cultivation upon the soil water, the forms in wdiich it is present in the soil should be studied. Water is present in soils in three forms : (i) bottom water, (2) capillary water, and (3) hydroscopic water. 19. Bottom Water is water which stands in the soil at a general level, and fills all the spaces between the soil particles. Its distance from the surface can be told in a general way by the depth of surface wells. Bottom water is of service to growdng crops when it is. Fig. II. Water films surrounding soil particles. at such a depth that it can be brought to the plant roots by capillarity, but when near the surface so that the roots are immersed, very poor conditions for crop growth exist. When the bottom water can be brought within reach of the roots by capillarity a crop has an almost inexhaustible supply. In many soils known as old lake bottoms such conditions 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 Snyder, Harry, 1867-1927. Easton, Pa. , The Chemical Publishing Co.
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Keywords: ., bookcentury1800, bookdecade1890, booksubj, booksubjectfertilizers
