This book gathers the latest findings on the microbial ecology of saline habitats, plant-microbe interactions under saline conditions, and saline soil reclamation for agricultural use. The content is divided into four main parts: Part I outlines the definition of salinity, its genesis and impacts, and microbial diversity in saline habitats. Part II deals with impact of salinity on microbial and plant life/health. Part III highlights plant - microbe interactions in saline environments, and Part IV describes strategies for mitigation and reclamation of saline soils. The salinization of arable land is steadily increasing in many parts of the world. An excessive concentration of soluble salts (salinity) in soils or irrigation water adversely affects plant growth and survival. This problem is exacerbated in arid and semiarid areas due to their low precipitation and high evaporation rates. In turn, poor management practices and policies for using river water for the irrigation of agriculture crops often lead to the secondary salinization of soils. Considering the growing demands of a constantly expanding population, understanding the microbial ecology and interactions under saline conditions and their implications for sustainable agriculture is of utmost importance. Providing both an essential review of the status quo and a future outlook, this book represents a valuable asset for researchers, environmentalists and students working in microbiology and agriculture. .

Advances in Agronomy continues to be recognized as a leading reference and first-rate source for the latest research in agronomy. Each volume contains an eclectic group of reviews by leading scientists throughout the world. As always, the subjects covered are rich, varied, and exemplary of the abundant subject matter addressed by this long-running serial.

’n Regstreekse, voor die hand liggende en effektiewe gids tot boom-identifikasie.

Dié boek se titel sê dit alles! Hierdie bygewerkte tweede uitgawe verskaf ’n duidelike uiteensetting van hoe bome saamgestel is en waarna om op te let wanneer ’n boom geïdentifiseer word. Die boek bestaan uit twee dele:

- Deel 1 beskryf en illustreer duidelik die verskillende dele van ’n boom en hul rol in boomidentifikasie.

- Deel 2 bevat ’n sleutel tot 43 boomgroepe, gebaseer op maklik waarneembare stingel- en blaarkenmerke. Dit gee ’n duidelike oorsig van elke groep, sowel as die Suider-Afrikaanse boomfamilies wat in die onderskeie groepe verteenwoordig word. Talle kleurfoto’s en verduidelikende illustrasies ondersteun die teks wat dié handleiding toeganklik en gebruikersvriendelik maak.

Identifiseer die Bome van Suider-Afrika sal lesers toerus met ’n goeie begrip van die bou van bome en waarna hulle moet oplet om dit korrek te kan identifiseer.

Also available in English as How to Identify Trees in Southern Africa .

Plant Micronutrient Use Efficiency: Molecular and Genomic Perspectives in Crop Plants presents information on the complex mechanisms regulating micronutrient use efficiency in plants. Understanding this science is essential for the development of new varieties of crop plants that are more resilient to micronutrient stress, as well as plants with increased bioavailable concentrations of essential micronutrients. This book explores the discovery of novel genes and key metabolic pathways associated with micronutrient use efficiency in plants, gives an analyses of the gene expression patterns in plants in response to low and/or high nutrient levels, and investigates the potential functions of these genes and their products. Strategies to enhance micronutrient use efficiency and stress tolerance, to develop bio-fortified crop, and to improve the sustainable utilization of natural resources are critically evaluated. The book contains both fundamental and advanced information as well as critical commentaries that are useful for those involved in the various fields that make up the plant sciences.

Rock surfaces provide a challenging habitat for a broad diversity of micro- or small-sized organisms. They interact with each other forming complex communities as well with their substrate causing biodeterioration of rock. Extreme fluctuation in light, temperature and hydration are the main factors that determine the rock surface habitats. The habitat includes epilithic organisms which thrive on the surface without penetrating the rock, endolithic organisms which live just beneath the surface using a thin layer of the rock surface for protection against adverse conditions of the environment (e.g. light protection, storage of water) and chasmo-endolithic organisms which use fractures of the rock surface for a more habitable environment. The book will provide an overview of the various organismal groups, from prokaryotes to vascular plants and arthropods, as well as survey organism-mediated interactions with the rock surface. The latter include biogenic weathering (biogeochemistry, state-of-the art imaging methods), photosynthesis and nitrogen fixation at and inside the rock surface.