Primary sector of the economy
Economic sectors Three-sector model Primary sector: raw materials
Secondary sector: manufacturing
Tertiary sector: services
Additional sectors Quaternary sector: information services
Quinary sector: human services
Theorists AGB Fisher · Colin Clark · Jean Fourastié Sectors by ownership Business sector · Private sector · Public sector · Voluntary sector
The primary sector of the economy includes any industry involved in the extraction and collection of natural resources; such as farming, forestry, mining and fishing. 
The primary sector tends to make up a larger portion of the economy of developing countries than it does in developed countries. For example, animal husbandry is more common in countries in Africa than it is in Japan.
In developed countries the primary industry has become more technologically advanced, for instance the mechanization of farming as opposed to hand picking and planting. In more developed countries, additional capital is invested in primary means of production. As an example, in the United States’ corn belt, combine harvesters pick the corn, and sprayers spray large amounts of insecticides, herbicides and fungicides, producing a higher yield than is possible using less capital-intensive techniques. These technological advances and investment allow the primary sector to require less workforce and, this way, developed countries tend to have a smaller percentage of their workforce involved in primary activities, instead having a higher percentage involved in the secondary and tertiary sectors.
Developed countries are allowed to maintain and develop their primary industries even further due to the excess wealth. For instance, European Union agricultural subsidies provide buffers for the fluctuating inflation rates and prices of agricultural produce. This allows developed countries to be able to export their agricultural products at extraordinarily low prices. This makes them extremely competitive against those of poor or underdeveloped countries that maintain free market policies and low or non-existent tariffs to counter them. Such differences also come about due to more efficient production in developed economies, given farm machinery, better information available to farmers, and often larger scale.
List of countries by agricultural output
Largest countries by agricultural output (in PPP terms) according to IMF and CIA World Factbook, at peak level as of 2018 EconomyCountries by agricultural output (in PPP terms) at peak level as of 2018 (billions in USD) (01) China
(—) European Union
(08) United States
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