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Showing items 1 through 9 of 611.-
Library ResourceArticles et Livresjanvier, 2017États-Unis d'Amérique, Bélarus, Europe
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Library ResourceDocuments et rapports de conférencedécembre, 2011Taiwan, États-Unis d'Amérique
Using a unique dataset of 703,287 farm operators from the Taiwanese Census of Agriculture merged to administrative records from the National Farmers' Health Insurance (FHI) program, we examine the effects of the enrollment in the FHI program on farmers’ on- and off-farm labor supply and the amount of land they allocate to Taiwan’s land retirement program. In order to account for non-random self-selection into the FHI we use a matching procedure to estimate the impact of the program on land and labor allocations.
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Library ResourceArticles et Livresdécembre, 1996Mexique, Canada, Guatemala, Afrique septentrionale, Asie méridionale
This paper discusses the centers of origin and diversity for bread wheat; sketches historical patterns in the sources and use of wheat genetic resources in modern plant breeding; identifies and compares indicators of genetic diversity used by social and biological scientists; reviews the relationship of wheat genetic diversity to yield stability and vulnerability to disease; develops a profile of the structure of genetic variation in wheat in the developing world today; and investigates how scientific plant breeding has influenced the structure of genetic variation among the major bread whe
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Library ResourceDocuments de politique et mémoiresdécembre, 2011Lettonie, États-Unis d'Amérique
For the last 15 years, the agglomeration of Riga has expanded and one of the most important problems that Riga faces is movement of middle-class people to surrounding municipalities. This tendency is mostly referable to the processes in the USA during the second half of the 20th century. This research has first identified the history and causes of urban sprawl since the earliest times and has compared it with the situation in Riga Region.
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Library ResourceArticles et Livresdécembre, 2007États-Unis d'Amérique, Japon, Chine, Inde, Fédération de Russie
Much is reported about the destruction of natural forests and the consequences for global warming, while on the other hand, exotic plantations in some regions struggle to gain public acceptance. The earth's population is projected to rise to around 9 billion by 2050, with a concomitant increase in demand for forest products. Inevitably, forests in general, and managed forest in particular, will be called on to provide an ever-increasing proportion of local supplies and the international wood trade.
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Library ResourceDocuments de politique et mémoiresdécembre, 2008Canada
Agricultural land protection near the urban-rural fringe is a goal of manyjurisdictions, including British Columbia, Canada, which uses a provincial-widezoning scheme to prevent subdivisions and non-agricultural uses of the land.Preferential taxes are also used to encourage agricultural use of the land. Small scalehobby farmers are present at the urban fringe near Victoria (the capital), both insideand outside of the Agricultural Land Reserve (ALR).
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Library ResourceArticles et Livresdécembre, 2015Serbie, Slovénie, Macédoine du Nord, Croatie, Chine, Monténégro, Amérique septentrionale
Analysis of collected data from 2011, in structure of used agricultural land in Serbia shows that dominated plough land and gardens and meadows and pastures, until in smaller percentage are orchards and vineyards. Almost the same relation is noticed in other republics of former Yugoslavia (meadow and pastures are the most prevalent view of using the agricultural land in Slovenia, Macedonia, B&H and Montenegro). Share of area under wheat notice smaller oscillation in all republics in the period 2008-2010, until yield per hectare is equalized for the same observed period.
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Library ResourceArticles et Livresdécembre, 2014Canada, États-Unis d'Amérique
Recent food crises have highlighted the need to better understand the between-year variability of agricultural production. Although increasing future production seems necessary, the globalization of commodity markets suggests that the food system would also benefit from enhanced supplies stability through a reduction in the year-to-year variability.
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Library ResourceDocuments et rapports de conférencedécembre, 2002États-Unis d'Amérique
The purpose of this paper has been to present quality-adjusted values for land in the United States and nine European countries using price and quantity data for 1990. Disregarding such differences in the quality-adjusted land input would generate biased estimates of the land input and thus of total factor productivity. Land quality adjustments could potentially be enhanced further with additional data on soil characteristics, climate, and other productivity-related characteristics.
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Library ResourceDocuments et rapports de conférencedécembre, 2011Brésil, États-Unis d'Amérique, Chine, Global
The economic and land use consequences of US biofuel programs and their contributions to GHG emissions have been the focal point of many debates and research studies in recent years. However, most of these studies focused on the land use emissions due to the first generation of biofuels such as corn ethanol, sugarcane ethanol, and biodiesel (e.g. [1, 2] [3, 4]). A quick literature review indicates that only a few attempts have been made to estimate these emissions for the second generation of biofuels which convert cellulosic materials into liquid fuels. Gurgel et al.
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