Environmental Soil Physics: Fundamentals, Applications, and Environmental ConsiderationsElsevier, 1998 M09 9 - 771 pages Environmental Soil Physics is a completely updated and modified edition of the Daniel Hillels previous, successful books, Introduction to Soil Physics and Fundamentals of Soil Physics. Hillel is a Pulitzer Prize-winning author, one of the true leaders in the field of environmental sciences. The new version includes a chapter and problems on computational techniques, addresses current environmental concerns and trends.
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From inside the book
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Page xxi
... volume of moisture retained in the soil at any time, though seemingly small, greatly exceeds the volume in all the world's rivers. The normally loose and porous condition of the soil allows the living roots of plants to penetrate and ...
... volume of moisture retained in the soil at any time, though seemingly small, greatly exceeds the volume in all the world's rivers. The normally loose and porous condition of the soil allows the living roots of plants to penetrate and ...
Page 9
... volume of the system. Systems in which at least one of the phases is subdivided into numerous minute particles, which together present a very large interfacial area per unit volume, are called disperse systems. Colloidal sols, gels ...
... volume of the system. Systems in which at least one of the phases is subdivided into numerous minute particles, which together present a very large interfacial area per unit volume, are called disperse systems. Colloidal sols, gels ...
Page 10
... volume) of a medium-textured soil at a condition considered optimal for plant growth. Note that the solid matter constitutes 50% and the pore Space 50% of the soil volume, with the latter divided equally between water and air. The ...
... volume) of a medium-textured soil at a condition considered optimal for plant growth. Note that the solid matter constitutes 50% and the pore Space 50% of the soil volume, with the latter divided equally between water and air. The ...
Page 11
... volume (solids and pores together). Obviously, pp is always smaller than ps. If the pores constitute half the volume, then pb is half of ps, namely about 1300 to 1350 kg/m”, equivalent to a bulk specific gravity (ob, which is the ratio ...
... volume (solids and pores together). Obviously, pp is always smaller than ps. If the pores constitute half the volume, then pb is half of ps, namely about 1300 to 1350 kg/m”, equivalent to a bulk specific gravity (ob, which is the ratio ...
Page 12
... volume. The wet bulk density depends even more strongly than the dry bulk density on the wetness or water content of the soil. Dry Specific Volume vi, l/b = V./M, = 1/pb (1.4) The volume of a unit mass of a dry soil (the reciprocal of ...
... volume. The wet bulk density depends even more strongly than the dry bulk density on the wetness or water content of the soil. Dry Specific Volume vi, l/b = V./M, = 1/pb (1.4) The volume of a unit mass of a dry soil (the reciprocal of ...
Contents
57 | |
127 | |
THE GASEOUS PHASE | 275 |
COMPOSITE PHENOMENA | 307 |
THE FIELD WATER CYCLE | 383 |
SOILPLANTWATER RELATIONS | 545 |
APPENDICES | 653 |
BIBLIOGRAPHY | 707 |
INDEX | 757 |
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Environmental Soil Physics: Fundamentals, Applications, and Environmental ... Daniel Hillel No preview available - 1998 |
Common terms and phrases
aggregates amount applied assume atmosphere average becomes calculate called capacity capillary cause clay concentration conductivity considered constant continuous crop curves decrease defined density depends depth described determined diffusion direction distribution drainage effect energy equal equation evaporation expressed factors field flow flux force fraction function given gradient greater head heat hence Hillel hydraulic hydraulic conductivity increase infiltration initial irrigation layer less liquid lower mass material matter mean measured method natural obtain occur organic particles phase physical plant pores potential pressure problem properties radiation range reduced regions relative resistance root salinity salt sample sand saturated soil moisture soil surface solution specific stress structure suction surface tension temperature tend tion unit values variable various volume water table wetness zone
Popular passages
Page 59 - All these things being considered, it seems probable to me that God in the beginning formed matter in solid, massy, hard, impenetrable, movable particles, of such sizes and figures, and with such other properties and in such proportion to space as most conduced to the end for which he formed them...
Page 108 - For to say nothing of half the birds, and some quadrupeds which are almost entirely supported by them, worms seem to be the great promoters of vegetation, which would proceed but lamely without them, by boring, perforating, and loosening the soil, and rendering it pervious to rains and the fibres of plants, by drawing straws and stalks of leaves and twigs into it ; and, most of all, by throwing up such infinite numbers of lumps of earth called worm-casts, which, being their excrement, is a fine manure...
Page 589 - I often say that when you can measure what you are speaking about and express it in numbers you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind: it may be the beginning of knowledge, but you have scarcely, in your thoughts, advanced to the stage of science, whatever the matter may be.
Page 169 - From calibration of a neutron probe we know that when a soil's volumetric wetness is 1 5% we get a reading of 24,000 cpm (counts per minute), and at a wetness of 40% we get 44,000 cpm. Find the equation of the straight line defining the calibration curve (in the form of Y = mX + b, where Y is counts per minute, X is volumetric wetness, m is the slope of the line, and b is the intercept on the Y axis).
Page 309 - I will never again strike down every living thing as I have done. 22 As long as the earth endures, seedtime and harvest, cold and heat, summer and winter, and day and night will not cease.
Page 277 - ... the thoughts of all men in all ages and lands, they are not original with me, If they are not yours as much as mine they are nothing, or next to nothing, If they are not the riddle and the untying of the riddle they are nothing, If they are not just as close as they are distant they are nothing. This is the grass that grows wherever the land is and the water is, This is the common air that bathes the globe.
Page 243 - Doth a fountain send forth at the same place sweet water and bitter? Can the fig tree, my brethren, bear olive berries ? either a vine, figs ? so can no fountain both yield salt water and fresh.