Titlebook: Advances in Soil Science; Volume 20 B. A. Stewart Book 1992 Springer-Verlag New York, Inc. 1992 Phosphor.rice.soil.soil science.water

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Gene Tsudik,Mauro Conti,Georgios Smaragdakision of the world. Worldwide there is more grain per capita available today than ever before (Stewart, 1987). The application of plant nutrients to different crops has contributed substantially towards this spectacular increase. Herdt and Capule (1983) estimated that from 1965 to 1980 increase in fer

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Advances in Soil Science978-1-4612-2930-8Series ISSN 0176-9340

Commentary

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0176-9340 the soil alone but is inferred from soil characteristics and soil behavior under defined conditions. In essence, the quality of soils is analogous to the health of humans, and just as there is no single characteristic that can be measured to quantify a person‘s health, there is no single measuremen

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Physical Fractionation of Soil and Organic Matter in Primary Particle Size and Density Separates, complexity of SOM and its importance to soil fertility have challenged generations of soil scientists, and numerous studies, of which some date back more than two centuries (see historical review in Kononova, 1961), have covered a vast array of aspects of SOM.

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Soil Water Repellency,69a). However, severe repellency is relatively uncommon, and hence the condition is generally regarded as interesting but inconsequential. Indeed, the assumption of nonwater-repellent behavior is the norm in soil physics (Philip, 1969).