Due to natural reasons, the United States has a vast land area, fertile soil and a suitable climate. Keywords humanistic reasons, advanced science and technology, high production efficiency, science and technology agriculture,
Why is American agriculture developed? A. agriculture accounts for the largest proportion in the national economy. B. have a good legal foundation.
If you have multiple questions, you should choose BCD.
The main characteristics of American agriculture are as follows:
First, agricultural laws and regulations and supporting systems are improved.
As an immigrant country, the United States has only a history of more than 200 years, but when its Ministry of Agriculture was founded in 1862, it was clearly stated that "agriculture is the foundation of manufacturing and commerce". With the development of industry, the proportion of agriculture in the American economy has gradually declined, but * * * has adopted the policy of supporting and protecting agriculture, making agriculture the most competitive industry in the world. American comprehensive agricultural support policy originated from Roosevelt's New Deal in 1930s.
The second is based on small family farms.
1826, the United States promulgated the Homestead Act, which laid the foundation for family farms. American farmers are family farms, and there are fewer and fewer company farms. According to statistics, in 2007, there were 96,000 company farms, 0/0.74 million cooperative farms and 0/0.9 million family farms in China. By 20 10, there will be about 2.2 million farms in the United States, covering 920 million acres, with an average of 4 18 acres per farm. Among the more than 2.2 million farms in the United States, there are about 3.5 million agricultural laborers, and the rest are children and the elderly. Each farmer manages an average of 400 mu of land, about 2400 mu. The average labor force of each farm is 1.6. In 20 10, 88% of the farms in the United States with incomes over 10 million dollars were family farms, and the agricultural products produced accounted for 79% of the agricultural output in the United States.
Third, agricultural production has a high degree of specialization.
The United States makes full use of natural conditions in different regions, and through scientific differentiation, agricultural production has realized the specialization of regional production and formed some famous production belts, such as corn belt, wheat belt and cotton belt. As early as 19 14, American agriculture has realized planting specialization to a great extent, and this pattern has been maintained to this day. This regional division of labor enables all regions in the United States to give full play to their comparative advantages, which is conducive to reducing costs and improving productivity. The establishment of a smooth land and water transportation network has further promoted regional division of labor and specialized production, which has also effectively promoted the rapid development of related industries in nearby areas.
Fourth, agricultural production is highly mechanized. As early as the 1940s, the United States was the first country in the world to realize the mechanization of grain production. In the late 1960s, the mechanization level of grain production was further improved, reaching the mechanization of the whole process from ploughing, soil preparation, sowing, field management, harvesting and drying. In the early 1970s, cash crops such as cotton and sugar beet were fully mechanized from planting to harvesting. At present, it still maintains the world advanced level in planting, factory livestock and poultry breeding, facility agriculture and agricultural product processing. At present, the production and scientific research departments of agricultural machinery in the United States are studying and popularizing the application of satellite communication, remote sensing technology, electronic computer and other high-tech technologies to tractors and other agricultural machinery, so as to realize unmanned driving, automatic operation and automatic monitoring of tractors and other agricultural machinery, so that all kinds of agricultural mechanical energy can realize farmland, sowing, fertilization, weeding and pest control more accurately and quickly. Mechanization of production, supplemented by scientific management, has greatly improved the efficiency of agricultural production.
The fifth is the integration of agricultural production and marketing.
The agricultural system in the United States is called "agro-industrial complex", and the number of people employed in this system accounts for 17% of the national labor force, which is much higher than the labor force that agriculture itself can absorb. The United States introduced the management methods and experience of developing first and then maturing in the industrial field into agriculture, forming the integration of production, processing and sales, and realizing industrialized operation. For example, in the grain production and marketing system, including the supply of agricultural inputs, the purchase and processing of agricultural products, wholesale and retail, and catering, a complete system of "from field to table" has been formed.
Sixth, science and technology are widely used in agricultural production.
Advanced science and technology are the solid backing of America's high productivity. America's economic strength keeps it in the leading position in agricultural technology. On the premise of protecting the environment and improving the quality of the environment, it is the basic goal of American agricultural research to use and save resources most effectively, improve agricultural output and profit rate, improve the quality of agricultural products and maintain the competitiveness of agriculture in the international market. At present, new agricultural biological technologies such as genetic engineering, cell engineering, enzyme engineering and fermentation engineering have been widely used.
Seventh, pay attention to the sustainable development of agriculture.
In order to protect the agricultural ecological environment, realize the sustainable development of agriculture, use and save agricultural resources most effectively, and maintain the sustainable competitiveness of agriculture in the world, the United States attaches great importance to the popularization and use of agricultural conservation tillage technology and machinery. After long-term efforts, ......
Why does America have developed agriculture in the world?
American agricultural science and technology is the most developed.
Throughout history, agricultural science and technology has always led and run through the whole development process of American agriculture. Its huge scientific research, education, extension system and a large amount of capital investment have been extremely successful, which has played a key leading role in making the United States the world's largest agricultural power.
At present, there are four research centers in the United States, 130 agricultural colleges, 56 state agricultural experimental stations, 57 regional extension stations established by federal and state cooperation, more than 3,300 agricultural cooperative extension institutions, 63 forestry colleges, 27 veterinary colleges, 9,600 agricultural scientists and17,000 agricultural technicians. In addition, there are 1200 scientific research institutions in the United States, which mainly serve the different nature of the agricultural field, and their service projects mainly include entrusted development and transfer of scientific and technological achievements. In addition, the advantages of American agricultural high technology are embodied in three aspects, namely agricultural mechanization, agricultural biotechnology and agricultural informatization.
(1), highly mechanized agricultural production.
There are many kinds of mechanized equipment on American farms, such as tractors of various models (about 5 million sets, mostly above 73.5KW, up to 276 kW); All kinds of combine harvesters (6.5438+0.5 million); All kinds of subsoiling machinery (chisel subsoiling, wing shovel subsoiling, vibration subsoiling, goose web subsoiling, etc.). ); All kinds of soil preparation machinery (disc harrow, tooth harrow, rolling harrow, compactor, light scarifier, etc. ); All kinds of seeders (grain seeder, corn hole seeder, cotton seeder, forage seeder, etc.). ); All kinds of plant protection machinery (sprayer, duster, soil processor, seed processor, granulator, etc.). ), combined operation machinery and all kinds of furrow irrigation, sprinkler irrigation and drip irrigation equipment are readily available, which basically realizes the mechanization of crop production from ploughing, sowing, irrigation, fertilization and spraying to harvesting, threshing, processing, transportation, selection, drying and storage. In livestock and poultry breeding, especially in raising chickens and cattle, due to the extensive use of complete sets of machinery and equipment such as feed crusher, milking machine and milk preservation processing, the production of livestock products has long been mechanized and automated. There are many other agricultural products that can be processed automatically by pressing a button.
Such large-scale mechanized production has greatly improved the production efficiency of American agriculture. At present, the average agricultural labor force on each American farm can cultivate 450 acres of land, take care of 60,000-70,000 chickens and 5,000 cows, produce more than 654.38 million kilograms of grain and 654.38 million kilograms of meat, and feed 98 Americans and 34 foreigners.
(2) Agricultural biotechnology is leading the world.
Another important feature of American agricultural high technology is that it has always attached importance to the wide application of biotechnology in agricultural production. The reason is that improved varieties of animals and plants can greatly improve the quality, yield and disease resistance of animals and plants, thus greatly improving the labor productivity of American agriculture. For example, cross breeding, a major breakthrough in traditional agricultural biotechnology, has brought great economic benefits to the United States. Among them, the average yield of a high-yield hybrid maize variety 1994 has reached 8697 kg/ha, which is 92% higher than that of 1970. The preferred hybrid pig can increase daily gain 1.5% and reduce feed consumption by 5-10%; However, high-quality hybrid cattle can often produce more beef 10- 15%. In addition, the wide application of frozen artificial insemination technology in American dairy cows, beef cattle, sheep, pigs and poultry has also significantly improved the reproductive rate of these animals.
At present, transgenic plants are an important field in the research and application of modern agricultural biotechnology. In this respect, the United States has been far ahead of other countries. Transgenic plants refer to the use of recombinant DNA technology to transfer various new trait genes from different plants and even animals to needed plants, thus cultivating a number of excellent new crop varieties with high yield, insect resistance, disease resistance, drought resistance and waterlogging resistance. For example, using genetic engineering technology, some high-protein genes are introduced into food crops to obtain high-protein wheat and high-protein corn; Transferring the insecticidal gene of bacteria into cotton to make cotton resistant to cotton bollworm; Cloning cold-resistant genes of cold-water fish into tomatoes to obtain frost-resistant tomatoes; The cactus gene was transplanted into wheat and soybean plants, and a new grain variety with high yield was obtained, which can grow in dry land and barren land.
By 2004, the United States had successfully cultivated a variety of transgenic crops such as insect-resistant cotton, insect-resistant corn, herbicide-resistant corn, insect-resistant potato, herbicide-resistant soybean, rape, cotton and so on through the biotechnology breeding method of gene recombination. ......
What are the natural reasons for the developed agricultural production in the Great Plains of the United States? What are the characteristics of American agricultural production?
Favorable conditions for agricultural production in the United States
Natural conditions: it is mostly temperate and subtropical, with moderate precipitation and hydrothermal conditions suitable for planting a variety of crops; The flat and open terrain and fertile soil are conducive to mechanized farming and large-scale management.
Socio-economic conditions: commodity economy is developed, and economic benefit is the primary factor affecting agricultural production; Developed transportation; Advanced science and technology and developed industries provide a strong guarantee for the development of American agriculture.
What is the reason for the large export volume of American agricultural output?
High degree of mechanization;
Its * * * policy support, good market competition and advanced technology;
The land area of the United States is 9.37 million square kilometers, and the cultivated land area of the United States accounts for about 20% of the total land area, which is 188 17000 hectares, and the per capita is close to 0.6 hectares. In 20 12, the agricultural population in the United States accounted for about 2% of the total population. In 20 12, the total grain output of the United States was 363 million tons, and the per capita share was 1 160 kg. The United States has a huge grain reserve, and the grain carry-over inventory ranks first in the world, which is roughly close to 1/3 of the world's total inventory in recent years. The United States pays equal attention to animal husbandry and planting. In 20 12 of the total agricultural output value of the United States, planting accounted for 52% and animal husbandry accounted for 48%. American livestock products occupy a huge share in the world. In 20 12, the sales volume of livestock products in the United States ranked 1 in the world, of which beef accounted for 2 1%, milk for 18% and eggs for 12%. The mode of production and productivity of American agriculture is the most developed in the world.
Why can the United States become the world's largest agricultural country
The reason why the United States can become the world's largest agricultural country;
1, with a vast territory and rich natural conditions.
2, large-scale production, high-tech production, fully mechanized production, low cost and large output.
3. Private ownership of land
4. Sound laws
5, pesticides, logistics, fertilizer and other related supporting industries.
6. The traffic is developed. The United States adopts fully mechanized farm management, fertilizing and spraying pesticides by plane. Efficiency is naturally high, and a few people can manage a large farm. Compared with intensive agriculture in China, it naturally has advantages. With the support of * *, it is normal to become the first agricultural country.
The population engaged in agricultural production in the United States is very small. Why is the output of agricultural products high?
Its labor tools and productivity are relatively new.
After reading it, I know why American agriculture is so developed.
The poor are treated differently from high-ranking officials and nobles. The yield will only affect the yield and quality of rice, and the war will not affect whether you are full or not. The relationship between supply and demand exists. Besides, it needs to be explained. However, due to drought, the ancient population was small, and industries such as locust plague and rat damage had a great impact on grain output, and agriculture was not up to standard. But the output of grain can be equal to or greater than the number of people who eat it, and the state of flood is different. The poem "The wine in Zhumen stinks and the bones on the road freeze to death" is very apt, but the rice shop has no direct relationship with the production level. in other words