. Soils, their properties and management. Soils. vvJjLi\.JL X Jl/Xt J\.Xxx THE CONTROL OF SOIL MOISTURE In the discussion of the water requirements of plants, it was apparent that for a normal yield of any crop the amount used by the plant alone was very great, var;^ing from five to ten acre inches according to conditions. Were this the only loss of water, the question of raising crops with given amounts of rainfall would be a simple one. Three further sources of water loss, however, are usually found functioning in the soil and tendmg to lower the water that would go toward transpiration, a l
. Soils, their properties and management. Soils. vvJjLi\.JL X Jl/Xt J\.Xxx THE CONTROL OF SOIL MOISTURE In the discussion of the water requirements of plants, it was apparent that for a normal yield of any crop the amount used by the plant alone was very great, var;^ing from five to ten acre inches according to conditions. Were this the only loss of water, the question of raising crops with given amounts of rainfall would be a simple one. Three further sources of water loss, however, are usually found functioning in the soil and tendmg to lower the water that would go toward transpiration, a loss absolutely necessary for proper plant growth. The various ways by which water finds an exit from a soil are (1) transpiration, (2) run-off over the surface, (3) percolation, and (4) evap- oration. The following diagram makes clear their re- lationships Transpiratm. Impomtion \r/(f off^ I J i / Percalatm ^ / 1" f ^hp&^fHmhf. 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; Fippin, Elmer O. (Elmer Otterbein), 1879-1949; Buckman, Harry Oliver, 1883-. New York, Macmillan
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Keywords: ., bookauthorlyontlth, bookcentury1900, bookdecade1910, bookyear1915
