Biological nitrogen fixation is a very valuable alternative to nitrogen fertilizer. This process will be discussed in the “Biological Nitrogen Fixation” book. A wide array of free-living and associative nitrogen fixing organisms (diazotrophs) will be covered. The most extensively studied and applied example of biological nitrogen fixation is the symbiotic interaction between nitrogen fixing “rh...

Recently Phelps and Wilson (1) reported the occurrence of hydrogenase, the enzyme which activates molecular hydrogen, in nitrogen-fixing bacteria. Because HZ specifically inhibits nitrogen fixation by red clover plants inoculated with Rhizobium trijolii as well as by Azotobacter (2,3), possession of hydrogenase by these organisms may be more than merely fortuitous. The possibility must be consi...

ENHANCING NITROGEN USE EFFICIENCY OF POTATO AND CEREAL CROPS BY OPTIMIZING TEMPERATURE, MOISTURE, BALANCED NUTRIENTS AND OXYGEN BIOAVAILABILITY Guodong Liu a , Yuncong Li a , Ashok K. Alva b , David M. Porterfield c & James Dunlop d a Horticultural Sciences Department, University of Florida, Gainesville, Florida, USA b Vegetable and Forage Crops Research Laboratory, USDA-ARS, Prosser, Washingto...

Heterocyclic compounds containing nitrogen are promising structure moiety for drug design. Dihydropyrimidines are one of the important heterocyclic compounds, which are of interest due to its efficiency towards various pharmacological uses. These are large group of structurally diverse compounds which are known to possess some characteristic properties like manifestations of novel structures, t...

Rotating biological contactors (RBCs) constitute a very unique and superior alternative for biodegradable matter and nitrogen removal on account of their feasibility, simplicity of design and operation, low land area requirement, low energy consumption, low operating and maintenance cost and treatment efficiency. The present review of RBCs focus on parameters that affect performance like rotati...

CONTENTS 36.1 Bio-Char Management and Soil Nutrient Availability ............................................. 518 36.2 Microbial Cycling of Nutrients in Soils with Bio-Char ............................................ 519 36.3 Biological Nitrogen Fixation in Soils with Bio-Char................................................. 521 36.4 Slash-and-Char as an Alternative to Slash-and-Burn ...........