Agriculture, Food Production, & Rural Land Use - AP Human Geography

"Swidden" or "slash-and-burn" agriculture is a form of subsistence farming practiced all over the world, although it is most widely found in tropical regions such as Amazonia. One of the oldest forms of agriculture, swidden involves clearing the forestation and growth in a desired field with axes, then burning the stumps to eliminate obstructions and enhance the soil. This practice has harmful effects of rainforests in which it is practiced and does not produce high yield for its farmers, causing ecological and economic problems.

Corn is the only subsistence crop of the presented options. Tobacco, cotton, and rice are all high intensive plantation crops. Tobacco, cotton, rubber, and papyrus are also not edible, therefore disqualifying them from being considered subsistence crops.

Subsistence agriculture involves food production mainly for the family. A farmer will grow most everything that the family would consume, and anything leftover will go to the local community rather than to a big market.

By definition, a subsistence crop is a crop that is grown primarily for the purpose of feeding/sustaining farmers and their families, with any surplus going towards trade. Of the following answer choices, rice is the only one that can be characterized as a subsistence crop, as rice is a staple food in many agricultural regions.

The term used to describe a man-made system whereby water is spread from its natural source (such as a lake or river) over a much larger geographic range to aid in agricultural production is “irrigation.” The invention of “irrigation” has been fundamental the growth of human societies by ensuring that a community can farm enough food to support an ever-growing population. It was first developed roughly six thousand years ago in China and Mesopotamia.

A “sawah” is an irrigated, or flooded, field used to grow rice. Sawahs are commonly found in Southeast Asia and Oceania. Rice is instrumental to sustaining the massive population of east and south Asia and much of it is grown in flooded fields in countries like Vietnam, Thailand, and Indonesia.

Desertification is the process by which deserts expand or arise. Many phenomena can lead to increased risk of desertification including: drought, over farming, and deforestation.

Of the options, only one is not really directly related to desertification. Ocean acidification, although a very real and pressing problem, is not as directly related to desertification as the others.

The term “desertification” is used to describe the process by which previously fertile lands become arid and unusable for farming. This process has happened in many places throughout the world, famously in Ancient Greece and Ancient Mesopotamia. The primary cause of desertification is usually over farming.

“Salinization” occurs frequently in arid climates. People use water to “irrigate” a previously untenable plot of land and make it usable for agricultural purposes. This allows them to work new plots of land for a period of time, but the water in this newly irrigated land evaporates much quicker than elsewhere and soon the earth is covered in residues of “salt” that render the land infertile.

Although you might not have known when exactly the “American Drought Relief Service” was created you should be able to guess based on information that you do know. The Dust Bowl drought, which occurred in the first half of the 1930s was the most severe drought in American history and led to widespread famine and forced migration. The Drought Relief Service was created to try to alleviate this problem.

“Degraded agricultural land” is l_and that was once fertile but has been made infertile by mismanagement and human intervention_. It is most common in densely populated areas of the world where large-scale farming has been common for a long period of time. For this reason, densely populated Western Europe is the correct answer. While all of these answers may contain some amount of degraded agricultural land, Western Europe contains the highest percentage of such land.

“Desertification” is the name given to the process by which previously fertile agricultural lands are made infertile made by human practices. “Salinization,” which refers to the buildup of salt deposits through irrigation and evaporation, is an example of desertification.

“Salinization” occurs when soil in an arid climate has been made available for agricultural production using irrigation. The water evaporates quickly off the newly irrigated land, leaving residues of salt lying in the earth. Over time this causes the land to become infertile. This process is known as “salinization.”

Even though North America is a developed region, it is not safe from desertification. Nearly 74% of North America's drylands are affected by desertification. The increasing rate and intensity of wildfires in the western part of North America is due to how climate change is affecting this region.

Africa does struggle with the affects of desertification and is just behind North America with 73% of drylands affected. Though there is less land affected, the economic toll for some countries in Africa is much greater.

Certain parts of Asia are also very affected by desertification. However, it is on a much smaller scale in the vast expanse of this region.

Europe and South America are the least affected by desertification.

The term used to describe a man-made system whereby water is spread from its natural source (such as a lake or river) over a much larger geographic range to aid in agricultural production is “irrigation.” The invention of “irrigation” has been fundamental the growth of human societies by ensuring that a community can farm enough food to support an ever-growing population. It was first developed roughly six thousand years ago in China and Mesopotamia.

A “sawah” is an irrigated, or flooded, field used to grow rice. Sawahs are commonly found in Southeast Asia and Oceania. Rice is instrumental to sustaining the massive population of east and south Asia and much of it is grown in flooded fields in countries like Vietnam, Thailand, and Indonesia.

Goats, sheep, and camels all originated in southwest Asia and are one part of the reason why many of the earliest agricultural societies and human civilizations arose in this part of the world. Throughout the history of civilization goats and sheep have been important for sustaining and clothing human populations, and camels have been vital to facilitating trade and long-distance travel.

Double cropping is not possible in places that have long winters because the growing season is shorter for the whole year.

Paddies are another name for rice fields. We can see these especially in various Asian countries, where rice is a staple food and agricultural feature.

America is a very large and significant producer of wheat and corn. American wheat exports, for example, account for a quarter of the world’s supply of wheat. Wheat is a vital crop to maintaining the human population in its current numbers. Most of these important crops are grown in the “Great Plains” states such as Kansas, Nebraska, Iowa, Oklahoma, and parts of Texas.