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Extra resources for Ageing And Employment Policies: The Arable Crop Sector (Agriculture, Trade and the Environment)
1. Assuming the crop is dominant in a given area. The comparisons are made among the arable crops considered in the study in terms of their relative importance of the respective issue. 2. Assuming conservation tillage practice. Source: OECD Secretariat. AGRICULTURE, TRADE AND THE ENVIRONMENT – THE ARABLE CROP SECTOR – ISBN-92-64-00996-5 © OECD 2005 – 29 The report is organised as follows: x Chapter 1 provides an overview of the relative importance of the arable crop sector in production and trade, examines changes in farm structures and discusses the main driving forces that affect such changes, including changes in area, yields and chemical inputs.
2 tonnes per ha of Australia and Portugal. Analogous wide differentials exist for maize and other arable crops. The reasons why country average yields differ from one another are many, including agro-ecological diversity and socio-economical factors. Irrigation, for example, is an important factor in the achievement of high yields in several countries. Moreover, agro-ecological and demand factors influence the mix of varieties of the same crop grown in each country; for example, low-yielding durum wheat versus higher-yielding common or soft wheat.
9 t/ha for forest. , 2004). Water-induced soil erosion is an important by-product of cereal production in Norway (Oygarden and Gronlund, 2004). Erosion occurs mainly in autumn or winter as the result of rainfall, snow melt and partly frozen soil conditions. Since 1993, threshold values for soil loss were 2 t/ha/year. In Switzerland, average soil losses during the 1998-2001 period decreased by 6% compared to the 1987-89 period (Prasuhn and Weisskopf, 2004). 7 t/ha/year. Significant damage associated with erosion was estimated for winter wheat.
Ageing And Employment Policies: The Arable Crop Sector (Agriculture, Trade and the Environment) by Organisation for Economic Co-Operation a