Christopher D. Earl, BS and Frederick M. Ausubel, Ph. D. ver the past decade, the cost of
nitrogen 0 fertilizers has placed an exponentially increasing burden on farmers. The price …

Only a few kinds of micro-organism can fix molecular nitrogen. The most important are
species of Rhizobium in legume root nodules, Azotobacter, blue-green algae and …

All human beings require certain preformed amino acids in order to synthesize proteins.
These amino acids are supplied by foods derived mainly from plant protein (for ex ample …

Understanding of biological nitrogen fixation has advanced with impressive rapidity during
the last decade. As befits a developing area of Science, these advances have uncovered …

Nitrogen is a key macro element required by aU living organisms. However, a broad
spectrum of nitrogenous compounds are usable by different organisms. Higher plants and …

Our knowledge of the biochemistry and biophysics of dinitrogen fixa tion has developed
rapidly in the 15 years since the first N2-fixing enzyme system was successfully extracted …

Although nitrogen gas (N2) accounts for about eighty percent of the Earth's atmosphere,
plants and animals do not have an easy time obtaining all the nitrogen they need for growth …

Biological N2-fixation consists in the reduction of N2 to NHa by living organisms. This
reaction, with minor assistance from commercial chemical fixation, is responsible for …

Biological N2 fixation is the process whereby N2 from the air is converted to NH3 bY. the
enzyme nitrogenase. Each year biological N2 fixation adds about 139 million tonnes of …

Xthough men and other land animals live in an ocean of air that is 79 percent nitrogen, their
supply of food is limited more by the availability of fixed nitrogen than by that of any oth er …