Soil Physics

Nitric oxide and NjO are direct intermediates in the denitrification pathway, the reduction of NO3 to Nj. Reduction to Nj is often incomplete, so that both NjO and Nj are equally important end products of denitrification, the ratio of NjO/Nj production being determined by soil physical properties. For example, NjO is the main end-product in acid soils, whereas low redox potentials and high organic matter content favour the further reduction to Nitric... 

NO Soil nitrogen, soil temperature, soil water (soil physical properties) approximately empirical... 

R. Azzam, et al. Internat. Symp. on Isotope and Radiation Techniques in Soil Physics and Irradiation Studies, Aix-en-Provence, Proc., p. 321, (1983). 

Soil physical properties most likely to be altered by biomass burning are soil structure, soil wettability, and clay mineralogy (Table HI) (43). The destruction of organic matter results in losses of soil structure, increases in bulk density, diminished aggregate stability and decreases in macropore space (44). 

L. Badalucco, F. De Cesare, S. Grego, L. Landi, and P. Nannipieri, Do soil physical properties affect the chloroform efficiency in lysing microbial biomass Soil Biol. Biochem. 29 1135 (1997). 

D. Hillel, Environmental Soil Physics , Academic Press, London (1998). 

UNSAT-H does not address the effects of soil density on plant growth and water balance. Disadvantages caused by the computational methods used to estimate soil water flow include the following (1) the model requires the user to choose from several submodels to solve the Richards equation this choice should be made by a person with training in advanced soil physics and (2) the model requires the input of several soil parameters that are difficult to estimate for the completed cover soil. 

Table 25.3 compares the characteristics of these four models.14 UNSAT-H and HYDRUS are the most widely known Richards equation models that use modem soil physics principles to estimate water movement within the soil profile. HELP and EPIC are widely known engineering models. 

Hillel, D., Applications of soil physics, Academic Press, New York, 1980. 

Scott H, Miller D, Renaud F. Rice soils Physical and chemical characteristics and behavior. In Smith CW, Dilday RH, editors. Rice Origin, History, Technology, and Production. Hoboken Wiley Sciences 2003. pp. 297-330. 

Hillel D. Introduction to Environmental Soil Physics. San Diego Elsevier Academic Press 2004. 494 p. 

Bartlett R.J. Soil redox behavior In Soil Physical Chemistry, Sparks D.L., ed, Boca Raton, FL CRC Press, Inc., 1986. 

Chapter 1 Soil Physical-Chemical-Biological Interfacial Interactions ... 

This paper presents an overview on soil physical-chemical-biological interfacial interactions and the impacts on the terrestrial ecosystem. 

In my view, the interfaces are the most underdeveloped areas of the sciences including Soil Sciences. Fundamental understanding of soil physical-chemical-biological interfacial interactions is a major step forward in advancing our understanding of in-situ interactive soil reactions and processes and their impacts on human welfare. 

Senesi N, Loffredo E (1999) The chemistry of soil organic matter. In Sparks DL (ed) Soil physical chemistry. CRC Press, Boca Raton, FL, pp 239-370 Sujatha TV, Hegde MJ (1998) C-mitotic effects of Trichloroethylene (TCE) on bone marrow cells of mice. Mutat Res 413 151-158 Varanini Z, Pinton R (2001) Direct versus indirect effects of soil humic substances on plant growth and nutrition. In Pinton R, Varanini Z, Nannipieri P (eds) The rizosphere. Marcel Dekker, Basel, pp 141-158 Vijayalaxmi KK, Venu R (1999) In vivo anticlastogenic effects of L-ascorbic acid in mice. Mutat Res 438 47-51... 

Colla G, Mitchell JP, Joyce BA, Huyck LM, Wafiender WW, Temple SR, Hsiao TC, Poudel DD (2000) Soil physical properties and tomato yield and quality in alternative cropping systems. Agron J 92 924-932... 

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