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Extensive farming

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Extensive farming is a specialized agricultural production system. It is defined by its relationship to land area. This system uses small inputs of labor, fertilizers, and capital. These inputs are small relative to the massive amount of land being farmed. It stands in direct contrast to intensive farming. Intensive farming uses high amounts of resources on smaller plots of land. Extensive agriculture allows humans to use vast territories for food production.

Grazing, continuous
Grazing, continuous

The mechanism of extensive farming relies on natural processes and scale. In many systems, animals engage in continuous grazing. This means sheep or cattle eat grass in a field constantly. This method requires very low inputs and outputs. In other regions, the mechanism involves large-scale cropping. Farmers plant vast fields of wheat, barley, or grain for cooking oils. This works well in flat terrains where mechanization can be used effectively. Large machines can cover huge distances without needing expensive land changes like terracing.

Herdwicks Lake District
Herdwicks Lake District

There are several distinct types of extensive farming systems. Pastoralism and ranching are common methods for raising livestock. Some herders practice nomadic herding, which is an extreme version of this system. These herders move their animals to find feed from occasional rainfalls. Another type is transhumance, which involves moving livestock seasonally. There are also cropping systems used in specific environments. Examples include slash-and-burn agriculture or the Taungya system found in Myanmar. These methods adapt to the specific needs of the local environment.

Geography plays a major role in where these farms exist. Extensive farming is found in mid-latitude sections of most continents. It also occurs in desert regions where water is too scarce for intensive cropping. This system requires less rainfall than intensive farming methods. History provides a clear example of these environmental limits in Australia. In the Murray-Darling Basin, the soils are extremely old and poor. Because the soil is poor, the yields per hectare are very low. However, the terrain is flat and the farm sizes are very large. This means the yield per unit of labor remains high.

Herdwicks Lake District
Herdwicks Lake District

Historical data shows how extreme these environments can be. In 1957, much of Western Australia had very poor pastures. The land was so limited that it could only support one sheep per square mile. This demonstrates the low stocking rates possible in extensive systems. While these farms are less profitable per unit of area, they offer unique advantages. They require less labor per unit of area. They also help keep product prices lower due to labor efficiency. This allows for the production of food on a massive scale.

Extensive farming offers several benefits for animal welfare and the environment. Animals are not kept in stifling or crowded conditions. This freedom often leads to better meat quality for customers. Animals bred in these large areas also develop more efficiently. The ecological impact is generally lower than intensive systems. Farmers use fewer chemicals, so the local environment and soil are not damaged by overuse. If animals graze on native grassland, there are fewer problems with exotic species.

Grazing, continuous
Grazing, continuous

However, the system does face certain disadvantages and challenges. Yields are often much lower than intensive farming in the short term. Because these farms require so much land, they can limit the habitats of wild species. There were also historical debates regarding greenhouse gases. People once thought extensive farming produced more methane and nitrous oxide per kilogram of milk. One study looked at the carbon footprint of milk production. It estimated the footprint in 2007 was 37 percent of the 1944 level per billion kilograms. However, recent studies suggest that extensive livestock systems actually impact the environment less than intensive ones.

Grazing, continuous
Grazing, continuous
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File:Herdwicks Lake District.jpg
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