Roughly one third of the world's population works in the agricultural sector. That's a lot of jobs.

Foreign Policy captures just a few of these workers on the job — from the Mexican workers that pick your lettuce and the coffee pickers in Brazil, to the watermelon farmers selling their fruit at a market in Lahore, Pakistan — in a stunning collection of photos.

Iraq's most lucrative export after oil - dates - has seen declining production since the American-led invasion began in 2003. Photo: Ikhlasul Amal (flickr)

The U.S.-led invasion of Iraq in 2003 and the subsequent violence has left the country struggling to survive. Now, Iraq’s economy is suffering even more due to declining production in one of its most thriving exports after oil: dates.

Dates are highly nutritious and a staple food in Iraq. Before the war, a typical palm tree was yielding 130 – 175 pounds of dates per year, compared to only 30 pounds of fruit last year, reports the New York Times. The country used to produce about 75 percent of the world’s dates at one point, but today Iraq has fallen behind many other Arab countries leading in date production.

The lack of “sufficient electricity, machinery and a drought” has severely damaged the agricultural industry, says Iraqi economist Ghazi al-Kenan. Prior to the U.S.-led invasion, there were more than 150 date processing factories. Today there are six.

Another factor contributing to the decline in date production is that the country's trade ministry — which is responsible for buying agricultural products for export from farmers — isn't purchasing dates at a high enough price to cover production costs for farmers, reports the New York Times.

But the decline in date production is causing more than just agricultural and economic problems for Iraq. Public health and the environment are also feeling the effects. Baghdad has experienced more sand storms, increased asthma cases and respiratory illnesses due to the shrinking of depleted farms and orchards surrounding the capital.

With the global economic downturn affecting oil prices, prospects for the date industry are looking grim. The Trade Ministry tells the New York Times that "it cannot afford to raise payments to farmers.”

Sugar is a popular commodity in India, where imports are expected to rise as droughts cause sugar prices to rise by 50 percent. Here vendors make sugar cane juice. Photo: Jim-C (flickr)

Sugar rushes tend to be followed by sugar crashes.

The western Indian state of Maharashtra has been called the "sugar bowl" of India, but that may be changing. A New York Times video sheds some light on the problems farmers in Maharashtra face as sugar production decreases, causing prices to rise.

India is the world's second-largest sugar producing country. But factors like insufficient rainfall, small plots of land and government regulation of the market are impacting sugar production in India and therefore driving up the price, making imported sugar a more affordable option in India.

Kenya is looking to the jatropha tree as a way of reducing the country’s dependence on imported fossil fuels and developing a biofuel industry.

A clean-burning oil can be extracted from the jatropha tree's seeds, which can be immediately used to power generators or be refined into biodiesel. The trees can grow even in the driest and most nutrient-depleted soils, so it doesn’t have to take up arable land needed to grow food.

Faith Odongo, a senior official at Kenya's Ministry of Energy, says that about 5,000 hectares of land are being set aside for cultivation and expects that the plant could help the country “reduce fossil fuel imports by 5 percent in the next four years” and give farmers a viable crop to grow.

Whether jatropha is a viable alternative to fossil fuels is debatable. But Continental Airlines powered a Boeing 737 for a two-hour test flight on jatropha oil mixed with algae and aviation fluid. The Los Angeles Times calls jatropha one of the "new generation of so-called sustainable biofuels that could help airlines cut fuel costs and reduce carbon emissions."

But there are drawbacks. One tree only produces two liters of fuel and the trees don't reach full maturity for four to five years.

Yet these drawbacks haven't stopped countries like India, which has set aside 100 million acres for jatropha trees and expects to use the yielded oil to "account for 20 percent of its diesel consumption by 2011," according to Time.

In this video, Al Jazeera's Yvonne Ndege explains how farmers in eastern Kenya are seeing their economic situation improve as a result of planting jatropha trees.

Photo: Pete Casier, UN World Food Programme (flickr)

When you think of North Korea, you may first think of the ongoing nuclear weapons debates and political squabble with the U.S. Yet according to the latest United Nations report, the most significant problem affecting North Koreans is the current shortage of food there.

The UN report found that more than three-quarters of North Korean families have cut their food intake to two meals per day. Even city dwellers are facing higher food prices. A recent Time magazine article says many children have stopped attending school due to hunger, while their parents search for food instead of going to work.

North Korea hasn’t seen such a devastating food crisis since the 1990s, when a famine took more than a million lives. Time blames the government for the current food shortage. In the 1990s, government officials privatized food distribution to some extent so that farmers could sell grains and food throughout the country. The result was that famished North Koreans could still find food. But in 2005, according to Time, the government broke up these markets and confiscated grain from farmers, leading to the current shortfall of production. Destructive floods in 2007 further hampered the country's agricultural production.

The UN also reported a rising number of children suffering from malnutrition and diarrhea. The food crisis guarantees more hunger-related deaths according to an expert on North Korean economy at the Peterson Institute for International Economics in Washington.

North Korea’s leadership does not want to pursue market reform according to Nicholas Eberstadt, a North Korea expert at the American Enterprise Institute in Washington. He says allowing open markets to emerge in the state dominated food distribution sector would imply a significant change of Pyongyang’s policies. Major reforms are not a part of North Korean culture or government, a regime that requires government permission to own a cell phone or computer. However, without changes in policy and perhaps even ideology, Eberstadt predicts that North Koreans will continue to experience health-related problems if the government is unable to provide basic necessities such as food.

The World Food Program has expanded their food aid program in North Korea in hopes of reaching 6.5 million people. Without additional help from donor countries, North Koreans may see the 1990s famine repeat itself.

Photo: snowsoulmate (flickr)

A small farmer in Oaxaca, Mexico is spreading knowledge of ancient farming techniques to discourage citizens from abandoning their land.

The Mixteca highlands, where Jesús León Santos resides, is home to some of the most barren land in Mexico. However, in the last two decades, León and a group of farmers have worked to reclaim and reforest the land. Farmers are getting bigger yields a reason to stick around by adopting long-discarded farming techniques.

As the land has begun to produce again, Mr. León has reintroduced the traditional milpa, a plot where corn, climbing beans and squash grow together. The pre-Hispanic farming practice fixes nutrients in the soil and creates natural barriers to pests and disease.

Although the yields are tiny in comparison to mechanized, bulk-producing farms located elsewhere, they're enough to provide the option for people to remain on their own land — and in their own country.

Mexican farmers continue to abandon their land and migrate to the U.S., some because their soil is unproductive or they can no longer compete under Nafta. And those who remain face escalating global food prices. As one former Oaxacan farmer put it to AP, "Not only are farmers not growing food, but we are going hungry because we can't afford the foreign food that drove us off our farms."

León’s aspiration is to give options for a better life in Mexico itself. So far, his strategies have given some farmers an opportunity they haven't had in centuries.

For those of you interested in learning more about the Mixteca highlands and how farmers are implementing ancient agricultural practices, check out the book The Other Game: Lessons from How Life is Played in Mexican Villages.

Today allAfrica revealed how increased funding to the UN's Rural Livelihoods and Economic Enhancement Program will teach Malawi's farmers how to benefit from increased market competition in the agricultural sector.

The program seeks to encourage production based on market needs rather than traditional small scale subsistence needs.