Agricultural Biotechnology And The Environment
$135.00
ISBN 13: 979-8-89143-214-7
YEAR: 2024
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Green Revolution
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Green Revolution, the great increase in the production of food grains that resulted in large part from the introduction into developing countries of new, high-yielding varieties, beginning in the mid-20th century. Its early dramatic successes were in Mexico and the Indian subcontinent. The new varieties require large amounts of chemical fertilizers and pesticides to produce their high yields, raising concerns about cost and potentially harmful environmental effects. Poor farmers, unable to afford the fertilizers and pesticides, have often reaped even lower yields with these grains than with the older strains, which were better adapted to local conditions and had some resistance to pests and diseases.
Green Revolution
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Green Revolution, the great increase in the production of food grains that resulted in large part from the introduction into developing countries of new, high-yielding varieties, beginning in the mid-20th century. Its early dramatic successes were in Mexico and the Indian subcontinent. The new varieties require large amounts of chemical fertilizers and pesticides to produce their high yields, raising concerns about cost and potentially harmful environmental effects. Poor farmers, unable to afford the fertilizers and pesticides, have often reaped even lower yields with these grains than with the older strains, which were better adapted to local conditions and had some resistance to pests and diseases.
Pests And Diseases
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Together pests and diseases cause up to 40% yield losses every year. The animal groups of the most significant importance as agricultural pests are (in order of economic importance) insects, mites, nematodes, and gastropod mollusks. Insects are responsible for two major forms of damage to crops. First, there is the direct injury they cause to the plants as they feed on the tissues; a reduction in leaf surface available for photosynthesis, distortion of growing shoots, a diminution of the plant's growth and vigor, and the wilting of shoots and branches caused by the insects' tunneling activities.
Pests And Diseases
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Together pests and diseases cause up to 40% yield losses every year. The animal groups of the most significant importance as agricultural pests are (in order of economic importance) insects, mites, nematodes, and gastropod mollusks. Insects are responsible for two major forms of damage to crops. First, there is the direct injury they cause to the plants as they feed on the tissues; a reduction in leaf surface available for photosynthesis, distortion of growing shoots, a diminution of the plant's growth and vigor, and the wilting of shoots and branches caused by the insects' tunneling activities.
Organic Farming and Gardening: Systems and Approaches
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Organic farming – an alternative agricultural system that relies on fertilizers of organic origin such as compost, manure, green manure, and bone meal and places emphasis on techniques such as crop rotation and companion planting. Biological pest control, mixed cropping, and the fostering of insect predators are encouraged. In general, organic standards are designed to allow the use of naturally occurring substances while prohibiting or strictly limiting synthetic substances.
Organic Farming and Gardening: Systems and Approaches
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Organic farming – an alternative agricultural system that relies on fertilizers of organic origin such as compost, manure, green manure, and bone meal and places emphasis on techniques such as crop rotation and companion planting. Biological pest control, mixed cropping, and the fostering of insect predators are encouraged. In general, organic standards are designed to allow the use of naturally occurring substances while prohibiting or strictly limiting synthetic substances.
Agricultural Technology
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A major turning point for agricultural technology is the Industrial Revolution, which introduced agricultural machinery to mechanize the labor of agriculture, greatly increasing farm worker productivity. In modern mechanized agriculture powered machinery has replaced many farm jobs formerly carried out by manual labor or by working animals such as oxen, horses, and mules. Advances in the 19th century included the development of modern weather forecasting and the invention of barbed wire. Improvements to portable engines and threshing machines led to their widespread adoption.
Agricultural Technology
$135.00
A major turning point for agricultural technology is the Industrial Revolution, which introduced agricultural machinery to mechanize the labor of agriculture, greatly increasing farm worker productivity. In modern mechanized agriculture powered machinery has replaced many farm jobs formerly carried out by manual labor or by working animals such as oxen, horses, and mules. Advances in the 19th century included the development of modern weather forecasting and the invention of barbed wire. Improvements to portable engines and threshing machines led to their widespread adoption.
Agricultural Economics
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Agricultural economics is an applied field of economics concerned with the application of economic theory in optimizing the production and distribution of food and fiber products. Agricultural economics began as a branch of economics that specifically dealt with land usage.
Agricultural Economics
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Agricultural economics is an applied field of economics concerned with the application of economic theory in optimizing the production and distribution of food and fiber products. Agricultural economics began as a branch of economics that specifically dealt with land usage.
History Of Agriculture
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Agriculture began independently in different parts of the globe and included a diverse range of taxa. At least eleven separate regions of the Old and New World were involved as independent centers of origin. The development of agriculture about 12,000 years ago changed the way humans lived. They switched from nomadic hunter- gatherer lifestyles to permanent settlements and farming.
History Of Agriculture
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Agriculture began independently in different parts of the globe and included a diverse range of taxa. At least eleven separate regions of the Old and New World were involved as independent centers of origin. The development of agriculture about 12,000 years ago changed the way humans lived. They switched from nomadic hunter- gatherer lifestyles to permanent settlements and farming.
Agriculture In Society
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Agrarian societies are dependent upon agriculture and have been around for more than 5,000 years. Imagine a society of farmers and you'll have a pretty good idea of what an agrarian society is all about. An agrarian society is a society whose economy and wealth are primarily based upon agriculture. Agrarian societies have been around for at least five thousand years. In fact, they still exist today. Nearly every civilization has spent some time as an agrarian society. The ancient Egyptian, Indian, Chinese, and Mayan societies were agrarian. Today, the poorest of the lesser-developed countries are pretty much agrarian societies.
Agriculture In Society
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Agrarian societies are dependent upon agriculture and have been around for more than 5,000 years. Imagine a society of farmers and you'll have a pretty good idea of what an agrarian society is all about. An agrarian society is a society whose economy and wealth are primarily based upon agriculture. Agrarian societies have been around for at least five thousand years. In fact, they still exist today. Nearly every civilization has spent some time as an agrarian society. The ancient Egyptian, Indian, Chinese, and Mayan societies were agrarian. Today, the poorest of the lesser-developed countries are pretty much agrarian societies.
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