Green Revolution
In the early 1960s developments in agricultural production, sponsored by international funding agencies, led to what came to be called the Green Revolution. These developments emphasized hybrid seeds, mechanization, and pest control as answers to the agricultural backwardness of the Third World. High-yielding varieties were promoted, as was the use of pesticides, and economies of scale of production, which could be successful only through mechanization of agriculture. This initiative did result in much better production figures across a range of countries. However, the Green Revolution has been criticized by environmentalists and others for resulting in environmental disasters in the countries where it was most effective. Mechanization of agriculture, where successful, led to changing work and social patterns, an exacerbation of class divisions in society, and the displacement of minority groups like tribal peoples and politically marginalized groups such as women from agricultural production. Further, new types of crops were not resistant to local diseases and required high levels of pesticides which polluted the local waterways, impoverished the land, and also increased the dependency of many Third World countries on the West with import of pesticides. Moreover, the commercialization of agriculture led to the exporting of food out of the local areas, increasing the dependence of producers on market forces that did not always benefit the majority of producers.
The development and use of high-yielding crops (HYVs) in conjunction with improved agricultural technology. New breeds of crops have been developed to increase yields two to four times, to shorten the time required for growth such that more than one crop a year can be produced, and to produce a plant which can withstand extremes of climate or disease. The use of Mexican wheat has doubled yields in the Punjab, and HYV rice has been used to such effect in the Philippines that imports are no longer necessary. The green revolution has had most impact in South and East Asia, and in South America, but has not been taken up to the same extent in sub-Saharan Africa.
There have been drawbacks, however. The grain may not be as palatable or as attractive in appearance as the grain it replaces, and it may use up more energy to process. Seeds have to be bought, as the hybrids are not self-fertile, and some varieties are less resistant to drought and disease. Heavy applications of expensive fertilizers and insecticides are required and these are often made from non-renewable resources.
Herbicides are required because the fertilizer stimulates weed growth as well as crop growth. The high yields and reliance on artificial fertilizers can lead to impoverished soils. Traditional rice exporters, like Burma, have seen the collapse of their markets. Increased yields mean that landowners can use their holdings more profitably and this often means that tenants are dispossessed. Copious, but strictly regulated, irrigation is required.
The green revolution has benefited the most prosperous farmers in the most prosperous areas but its price is too high for many of the peasants who need its help. To that extent, it has only been a partial success.
Green Revolution, term referring mainly to dramatic increases in cereal-grain yields in many developing countries beginning in the late 1960s, due largely to use of genetically improved varieties. Beginning in the mid-1940s researchers in Mexico developed broadly adapted, short-stemmed, disease-resistant wheats that excelled at converting fertilizer and water into high yields. The improved seeds were instrumental in boosting Mexican wheat production and averting famine in India and Pakistan, earning the 1970 Nobel Peace Prize for American plant breeder Norman E. Borlaug, leader of the Mexican wheat team. Significant though less dramatic improvements followed in corn. The Mexican program inspired a similarly successful rice-research effort in the Philippines and a network of research centers dedicated to the important food crops and environments of the developing world. By 1992 the system included 18 centers, mostly in developing countries, staffed by scientists from around the world, supported by a consortium of foundations, national governments, and international agencies. Recent research responds to criticism that the Green Revolution depends on fertilizers, irrigation, and other factors that poor farmers cannot afford and that may be ecologically harmful; and that it promotes monocultures and loss of genetic diversity. Most crops consumed by the public-at-large in industrialized nations are Green Revolution crops. The design of high yielding varieties or hybrid strains (so called because they were created by cross-breeding a broad range of varieties to produce the desired combination of characteristics in a single variety, although very random mutagenesis was also used) was motivated by a desire to, first, increase crop yield, and also to increase durability transport and longevity for storage. Norin 10 wheat is an example of such a strain that helped developing countries, such as India and Pakistan to increase the productivity of their crops. Since then, strains have been bred for better appearance (e.g. plumper tomatoes, or straighter, more evenly-coloured rows of maize (corn)). Since improved crop yield was produced mostly through the use of heavy fossil fuel inputs (discussed below), the increased efficiency of Green Revolution strains is geared towards these inputs; that is, the strains are more efficient at exploiting the chemical fertilizers used, and also are designed to be easier to harvest mechanically.
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The green revolution saved over a billion of people all over the world from famine and provided more food sources.
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