Titlebook: Nitrogen in Soils of China; Zhao-liang Zhu,Qi-xiao Wen,J. R. Freney Book 1997 Springer Science+Business Media Dordrecht 1997 Ammonium.Fert

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Liang-Mo Liergraduate students - not the ideal stu­ dents that mathematics professors wish for (and who occasionally grace our campuses), but the students like many the author has taught: talented but ap­ preciating review and reinforcement of past course work; willing to work hard, but demanding context and m

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Forms and amount of nitrogen in soil,ore than 70%, of the N absorbed by cereal crops is derived from the soil N pool (Zhu 1988). Obviously, knowledge of the forms, distribution and amount of N in soil is essential for understanding the N supply characteristics of a soil and for the efficient management of fertilizer N. In this chapter,

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Natural 15N abundance in soils,nd heavy isotopes in chemical reactions is strictly identical. These are two basic assumptions for conducting tracer experiments with stable isotopes. However, it is now known that the variation in natural abundance of the isotopes of elements is a biogeochemical phenomenon existing universally in n

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Nitrification,tion is inter-linked with the mineralization-immobilization and N loss processes, it is an important N transformation which is related not only to the efficiency of fertilizer N, but also to the contamination of the environment. In this chapter some aspects of nitrification relating to investigation

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Biological nitrogen fixation,oval, ammonia volatilization, denitrification and leaching. Microorganisms capable of fixing atmospheric nitrogen are widely distributed on the surface of the earth, and various BNF systems composed of microorganisms and plants exist (Table 7.1). It has been estimated that the total amount of N fixe

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Denitrification,and/or nitrite to gaseous N oxides and N2 gas under anaerobic conditions. Nearly all denitrifying bacteria are strict aerobes which use nitrate instead of oxygen as the terminal electron acceptor in respiration. The sequence of bacterial denitrification is thought to be,.Since denitrification not on

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