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This book analyses the nature of the relationships between crops, livestock and the bio-physical environment, and the extent to which man has managed and modified the products and environment to suit his/her own particular needs.
Farming Systems of the African Savanna: A continent in crisis
Integrated view of the genesis of grasslands of the New World tropics, especially those of Venezuela.
Savannas are the most widespread ecosystem in the tropics and as such are subjected to great human pressure that may result in massive soil degradation. The book addresses the role of species in the function of savanna ecosystems. It is shown that savannas are enormously diverse and that four factors determine the function of savanna ecosystems: Plant Available Moisture; Plant Available Nutrients; Fire; Herbivores.
Can a continuous growth of agriculture be achieved in the sub-Sahara region without inducing irreversible damage to the ecosystem? Until now, doubts have been expressed as to the actual capacity of the soils to sustain a desirable increase of production which can match the requirements of a fast-growing population. Thirty years of investigation and a renewed comprehensive interpretation of research data on soil fertility show that a sustainable agriculture growth could be a practical possibility in a savannah region.
Employing nearly half of the world's workforce, agriculture is clearly of great economic and social importance. An incredible variety of methods are used globally; the Western world has the latest scientific and industrial advancements at its disposal, yet in the Thrid World a living is made using tools that have hardly changed in two thousand years. An Introduction to Agricultural Geography provides an extensive guide through this diverse and increaslingly important geographical subject, aiming to show that a wide range of factors explain how agricultural practices differ from place to place. Dealing with the physical environment, economic behaviour and demands, institutional and social influences and the impact of farming upon the environment, the author has produced an important introductory text that is topical, incisive and ultimately essential to reach an understanding of the remarkable diversity of the world's major industry.
Rooted firmly in the principles of econology, the agricultural enterprise, even though having been exposed to the impact of environmental problems arising from land degradation, soil erosion, groundwater depletion and pollution and loss of biological diversity, has so far stood firm and survived to meet the food requirements of the growing population, so much so that there have been some striking instances of food glut in several countires, including some that used to sufer famiens only half a century ago.
A coherent, readable summary of the technical information available on savannas, barrens and rock outcrop plant communities.