Biology Life Sciences

Agriculture in Semi-Arid Environments by Anthony E. Hall

By Anthony E. Hall

The semi-arid zones of the realm are fragile ecosystems that are being sub­ stantially changed through the actions of mankind. expanding human populations have ended in better calls for on semi-arid zones for offering human susten­ ance and the prospect that this can increase desertification is a grave crisis. those zones are harsh habitats for people. The famines that resulted from drought in the course of the overdue 1960's and the 1970's within the African Sahel illustrated the unreliability of current agricultural structures during this area. huge fluctuations in ag­ ricultural creation have happened in semi-arid zones of Australia, North Ameri­ ca, and the Soviet Union as a result of periodic droughts, even supposing enormous ag­ ricultural know-how has been dedicated to agricultural improvement in those zones. The problem to mankind is to control those diversified semi-arid zones in order that seasoned­ ductivity is elevated and stabilized, and environmental deterioration is lowered. Irrigation can be utilized to extend and stabilize agricultural creation in semi-arid zones as mentioned in quantity five of this sequence, Arid area Irrigation. the current quantity, Agriculture in Semi-Arid Environments, specializes in dryland farming in semi-arid zones, and is correct to the massive components of the realm the place rainfall is restricting and the place water isn't to be had for irrigation. This quantity is designed to help agricultural improvement in those parts and comprises studies and analyses of obtainable info by way of scientists operating in Africa, Australia, and on the U ni­ versity of California.

Show description

Read Online or Download Agriculture in Semi-Arid Environments PDF

Similar biology & life sciences books

Life Strategies, Human Evolution, Environmental Design: Toward a Biological Theory of Health

Reflect on that you just have been requested find out how to determine human survival. the place could you start? Conservation of assets jumps to brain. we have to preserve assets so that monetary actions may perhaps proceed. unfortunately, it is a fake begin. assets are continuously outlined by means of a given financial system, and simply it determines what's and what's no longer a source.

Instrumental Analysis in the Biological Sciences

Instrumental recommendations of study have now moved from the confines of the chemistry laboratory to shape an essential a part of the analytical armoury of many employees keen on the organic sciences. it truly is now fairly out of the query to considcr a laboratory facing the research of organic fabrics that's not outfitted with an in depth variety of instrumentation.

Alas, Poor Darwin: Arguments Against Evolutionary Psychology

This day, genes are known as upon to provide an explanation for virtually each element of our lives, from social inequalities to healthiness, sexual choice and illegal activity. in accordance with Darwin's thought of evolution and usual choice, Evolutionary Psychology with its declare that 'it's all in our genes' has develop into the preferred clinical conception of the overdue twentieth century.

Chance and Necessity: An Essay on the Natural Philosophy of Modern Biology

Likelihood and Necessity: Essay at the usual Philosophy of recent Biology (French: Le Hasard et l. a. Nécessité: Essai sur los angeles philosophie naturelle de l. a. biologie moderne) is a 1970 e-book by means of Nobel Prize winner Jacques Monod, studying the strategies of evolution to teach that lifestyles is barely the results of normal tactics through "pure chance".

Extra resources for Agriculture in Semi-Arid Environments

Example text

C. (Kovda, 1961). This innovation opened areas of the steppes where the toughness of the sod had been impenetrable to wooden hoes and led to fieldcrop farming on an extensive scale. "Burnt-earth farming" in which steppe grass and sod were fired seems to have been an essential feature of this system. , the Scythians in the southern steppes engaged in extensive farming and stock-breeding. The major implement was a simple plow, without moldboard, made of iron or wood reinforced by iron. Hard spring wheat and millet were grown under a long-term fallow system.

Most Indian crops were already domesticated when agriculture began there in late Neolithic times, and are believed to have diffused to India from the Near East. c. in India, is still unknown. A few Indian scholars have suggested that it might have been domesticated on the Indian subcontinent (Vishnu-Mittre, 1977). c. (Piggott, 1950; Allchin and Allchin, 1968). Here ancient crops included wheat, barley, lentils, field peas, and flax. , agriculture got underway in the southern part of the Deccan plateau, where there was an emphasis on growing finger millet (Eleusine coraccina), possibly bulrush millet (Pennisetum typhoides), and a variety of pulses.

In the middle Dnieper basin, the principal farming implements found in excavations of ancient sites were spades and hoes made from stone, bone, horn, and wood. Animal bones found in sites from Neolithic times indicate animal domestication occurred gradually during the hoe-farming period. In the dry eastern parts of the Russian plains, herding became more important than cultivation. Sheep and goats appear to have been domesticated first and horses last. Seeds found in burials indicate that wheat, barley, millet, and rye were cultivated in a large area stretching from the Lower Danube to the middle reaches of the Dnieper River.

Download PDF sample

Rated 4.27 of 5 – based on 7 votes