Biological N2 fixation represents the major source of N input in agricultural soils including
those in arid regions. The major N2-fixing systems are the symbiotic systems, which can play …

Symbiotic nitrogen fixation is highly sensitive to drought, which results in decreased N
accumulation and yield of legume crops. The effects of drought stress on N2 fixation usually …

The second edition of this book, first published in 1991 and intended for students and
researchers, contains revised and updated material on the theory and practice of nitrogen …

The physiognomy of dry savannas is described as a combination of discontinuous woody
perennials and a continuous grassland matrix. Interactions between these two components …

Symbiotic nitrogen (N2) fixation in legumes may give the host plant a distinct competitive
advantage; at the same time it is mainly responsible for introducing N into terrestrial …

The mechanisms involved in the inhibition of nitrogenase activity in legume nodules by
nitrate is unclear. This paper reviews and evaluates proposed mechanisms of this inhibition …

Legumes fix atmospheric nitrogen (N) in a symbiotic relationship with bacteria. For this
reason, although legume crops can be low yielding and less profitable when compared with …

Nitrate is usually the principle form of mineral nitrogen available to plants in the soil. Many
legume species also have direct access to biologically fixed nitrogen, but preferentially …

The rhizobium–legume symbiotic system is crucial for nitrogen cycle balance in agriculture.
Hydrogen sulfide (H2S), a gaseous signaling molecule, may regulate various physiological …

Nitrogen fertilization of alfalfa (Medicago sativa L.) at establishment has been a controversial
practice. A review of the literature was conducted to determine conditions when preplant N …