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Additional info for Ageing And Employment Policies: The Arable Crop Sector (Agriculture, Trade and the Environment)
Waterlogging occurs as a result of a rise in the level of the water table, commonly caused by inefficient irrigation practices, such as inadequate drainage. The rise of the water table may also increase salinisation by drawing salt upwards from the lower soil horizons. Most arable crops do not tolerate salt and are seriously affected when salts concentrate within the root zone. The main impact of increasing soil salinity is loss of production, yields and income. Other on-farm effects include the decline in the capital value of land, salinisation of water storage, loss of farm flora and fauna, and loss of shelter and shade.
Mexico is an exemption, with 68% of all maize grown being used for human consumption. Approximately 94% of maize exports from the United States are destined for Latin America, in general, and Mexico, in particular (11% of US exports). Since 1996, US maize exported to Mexico has increased at the same time that exports to Europe have decreased. The decline in European markets coincided with the nascent production of transgenic maize in the United States. Maize cultivation is believed to have originated in Mexico, has particular cultural, social and economic significance.
Very large farms = farms with >= 100 ESU. Source: EC, RICA Database, 2003. 2. Regional concentration The trend towards fewer but larger cereal farms applies throughout the OECD area, although to varying degrees. However, aggregate national statistics conceal divergent trends within farms of different size and in different regions across countries. Arable crops production is also characterised by regional concentration, reflecting the resource endowment, climate, soil types and policy changes in diverse regions.
Ageing And Employment Policies: The Arable Crop Sector (Agriculture, Trade and the Environment) by Organisation for Economic Co-Operation a