Agricultural Crops Case Studies

Agricultural Crops Case Studies azs2

Socio-economic Factors

In addition to the climate and soil resources for crop production, many socioeconomic factors influence which crops farmers chose to cultivate, including production costs, domestic and international market demand; and government policies that subsidize agricultural producers, and reduce trade barriers or export costs. As discussed in Module 3, the protein, energy, fat, vitamins, and micro-nutrients of crops for human nutrition are one predictor of the market value of a crop. However some food crops are highly valued and cultivated for their cultural and culinary qualities, such as flavor (ex. chilies, vanilla, coffee, wine grapes); and their high economic value often reflects high production and processing costs, as well as market demand for their unique culinary and cultural properties.

Some crops are cultivated for non-human food uses such as livestock feed, biofuel, fiber, industrial oil and starch, and medicinal uses. Crop processing often creates by-products that can be used for other purposes, adding market value. For example, when oil is extracted from oilseeds such as soybean, the soybean meal by-product is high in protein and sold for livestock feed or added to human food products. And for crops that are cultivated on many acres often with support from government policies, the consistent, abundant supply of these commodity crops has contributed to the development of multiple processing technologies, uses, and markets. To better understand factors that contribute to the production of commodity crops, we will now examine two case studies of corn and sugarcane.

Understanding Agricultural Commodities: Two Agricultural Crops Case Studies 

In the following two agricultural crop case studies, you will have the opportunity to apply your understanding of crop plant life cycles, classification systems, and crop adaption to climatic conditions to understand how plant ecological features and human socioeconomic factors influence which crops are some of the major crops produced in the world.

Corn (Maize) Case Study

Corn (Maize) Case Study azs2
Cornfield
Figure 6.2.5: Cornfield in Pennsylvania
Credit: Heather Karsten

Corn or maize is a summer annual C4 crop in the Poaceae, or grass family that has high nutrient demands. Unless soil conservation practices are used, corn fields do not have live roots protecting the soil from erosion and providing other soil quality benefits after harvest in the fall, winter and spring. The US is the largest corn producer in the world. Soils and climate, particularly in the Midwest, permit high corn yields; and significant investment in agricultural research has produced high-yielding corn hybrids and production technologies, such as fertilizers, pest control practices, farming equipment, and irrigation. Research has also developed diverse uses for the large quantities of corn produced in the US, and the US is also a major exporter of corn.

Read this overview of US corn production and uses from the US Department of Agriculture, Economic Research Service, Corn and Other Feed Grains.

Sugarcane Case Study

Sugarcane Case Study azs2

The US consumes the most sweeteners of any country in the world. In the US, high-fructose syrup is made from corn, which has displaced some sugarcane production for sugar for the US market. Sugarcane production, however, has continued to increase in Brazil, the biggest sugarcane producer in the world. Sugarcane is a C4 perennial crop in the grass family and it's not grown just for sugar as a food sweetener.

Watch this United Nations video below, about the factors contributing to increased sugarcane production and some of the consequences. Then answer the questions below.

Video: Brazil: The ethanol revolution (4:55)

Brazil: The ethanol revolution

NARRATOR: 49 year-old Severino Ramos de Enraja works for Moema mill, a large agribusiness company in Sao Paulo state in southeastern Brazil. From sugarcane the company makes sugar and ethanol alcohol, which partially substitutes for gasoline in Brazil. Less gasoline means reducing the harmful pollution which is changing the world's climate. But despite his work, Severino and hundreds of thousands of others may end up losing their jobs, ironically due to the success of their industry. I'm getting old and I don't have an alternative. I hope to be able to find work elsewhere. Tadeo Endraj is a director at the country's leading scientific research and development center. No other country has so much technology related to sugarcane. From producing plant varieties, growing, cutting, transporting, and other industrial processes related to sugar and alcohol production. During the 1970s, Brazil's economy was severely affected by an oil embargo and rising prices. The country's military government launched a national program to reduce its dependency on foreign oil. It encouraged the construction of ethanol plants, offering low-interest loans to sugar companies and subsidies to keep the price of fuel low. The automobile industry adapted quickly. The widespread use of ethanol has made the country a global leader in cutting emissions and oil imports at the same time. Increases in world prices of oil, international tensions, and an urgent need to address environmental concerns, are fueling the rapid expansion of the international market for Brazilian biofuels. During the first six months of 2007, the country's ethanol exports shot up by 70%. This is the industry's future. Here at Moema Mills, 50% of the sugar cane harvest is already mechanized. The three workers that operate each of these machines can replace sixty cane cutters. The mechanization process is here, it has arrived. It's whirring for us. But can cutters themselves are your machines. We are the beginning of the entire process. Mechanized cutting is also seen as better for the environment. Traditionally, manual harvesting sugarcane is aided by burning, which clears the plant's serrated leaves and tops. The burning is carefully controlled, but this wasn't always the case. Fires themselves create pollution and uncontrolled blazes have led to the destruction of forests and wildlife. State legislators have set a deadline for stopping this practice. By the year 2014, burning will no longer be permitted and almost all of San Paulo sugar plantations will shift from manual to mechanized harvesting. This means cane cutters will no longer be needed. There are no guarantees that jobs will be found for each cutter, but there is awareness that mass unemployment could lead to social chaos. Ricardo Brito Pereira is Moema Mills’ director. They need social stability and we need to create employment. The cutters will be absorbed in our future expansion. This is our responsibility. It's not only up to the government, the unions, we have to be involved. Brazil aims to double its current production of ethanol in 10 years. This might mean more need for farm machinery. Many believe that the conversion of ethanol into a tradable commodity worldwide, as oil is, is crucial for lifting the developing world out of poverty. To balance environmental concerns, technological developments and the redeployment of hundreds of thousands of cane cutters will be a major challenge for Brazilian society. This report was prepared by Heine Teskey for the United Nations.

Credit: United Nations. "Brazil: The ethanol revolution." YouTube. February 9, 2009.

If the video does not play, please see Brazil: The ethanol revolution (United Nations).