Open access peer-reviewed Edited Volume

Nitrogen in Agriculture - Physiological, Agricultural and Ecological Aspects

Takuji Ohyama

Tokyo University of Agriculture

Dr. Ohyama is a former vice-president and president of the Japanese Society of Soil Science and Plant Nutrition. He and his team have developed a deep placement of coated urea and lime nitrogen to increase soybean seed yield and quality. In 2000 he received an award from the Japanese Society of Soil Science and Plant Nutrition and in 2005 Niigata Nippo Bunka Award in recognition of his extraordinary contribution to his field of research.


Kazuyuki Inubushi

Chiba University

Dr. Inubushi is author/co-author of more than 300 refereed publications, 90 conference papers, 40 book chapters, and 300 reports. He is the board member of the Japanese Society of Soil Science and Plant Nutrition, Editorial members of Biology and Fertility of Soils (Regional Editor); Soil Science and Plant Nutrition; and Microbes and Environments.


Nitrogen Absorption and Metabolism Nitrogen Use Efficiency Nitrogen Fixation Nitrogen Storage in Crops Nitrogen Cycling in Soils Soil Microbes Ecological Problems Economical Aspects Chemical Nitrogen Fertilizers Organic Nitrogen Fertilizers Biofertilizers Nitrification Inhibitors

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About the book

Nitrogen is an essential major elements in all organisms, as the components of proteins, amino acids, nucleic acids, and many indispensable metabolites. Nitrogen is the most important nutrient elements for agriculture, because the availability of nitrogen from soil is generally not enough to support the yields and quality of crops.

In addition the nitrogen stored in soil is decreased by repeated cultivation, because the harvested parts of crop is taken out from the fields. To keep the soil fertility, crop rotation and application of organic matters have been practiced. After chemical nitrogen fertilizers have been produced by the industrial nitrogen fixation, farmers can use the chemical nitrogen fertilizers for agriculture. As a result, the productivity of crops increased several folds during 20th century to feed the increasing world population. On the other hand, the excess or inappropriate use of nitrogen fertilizers caused environmental problems such as nitrate leaching and contamination in ground water and rivers, emission of global warming gas N2O.

In this book, recent progress will be introduced on the N in agriculture, especially N utilization and efficient use in crops, dynamics of soil N in agricultural fields and its role on agriculture, ecology of nitrogen in agriculture, and nitrogen fertilizers in agriculture, in order to improve nitrogen use efficiency and reduce the ecological problems for sustainable agriculture.

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Book initiated and editor appointed

Date completed: August 24th 2020

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Deadline for chapter proposals: September 21st 2020

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Deadline for full chapters: November 20th 2020

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Review results due: February 8th 2021

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Expected publication date: April 9th 2021

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About the editor

Takuji Ohyama

Tokyo University of Agriculture

Takuji Ohyama is a Professor of Faculty of Applied Biosciences, Department of Agricultural Chemistry, Tokyo University of Agriculture (2017 -present). He obtained a Ph.D. degree in agriculture from the University of Tokyo in 1980, and got an academic position in Niigata University in 1982. He has been a Professor of Faculty of Agriculture at Niigata University from 1982 till 2017. He has also served as Dean of Graduate School of Science and Technology at Niigata University (2010-2014) and Dean of Faculty of Agriculture at Niigata University (2006-2010). He was a president of Japanese Society of Soil Science and Plant Nutrition during 2007-2009. His research interests are: nitrogen fixation and metabolism in soybean plants, new technology of deep placement of slow release nitrogen fertilizers for soybean cultivation, and nitrogen and carbon metabolism in tulip, curcuma, and cucumber. He is also interested in use of stable isotopes and positron emitting radioisotopes.

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Book chapters authored 6

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