نتایج جستجو برای: arable land
تعداد نتایج: 119576 فیلتر نتایج به سال:
Microalgae photobioreactor systems at the University of Dayton Research Institute’s (UDRI) Carbon Sequestration and Bio Fuel Laboratory are being used to investigate algae’s ability to capture CO2, clean wastewater, and produce algae biomass that can be used for carbon neutral biofuel generation. Algae cultivation is of interest because it does not require arable land or fresh water, and algae ...
North Hebei province lies in the ecotone from agriculture to animal husbandry and forest and is eco-fragile transitional region. Serous land degradation, especially grassland degradation occurs in this area, because of overgrazing and over-reclamation. There are also many disasters, such as drought, dust storm, forest fire, and so on. This area has characteristics of ecological degradation and ...
The implications of the propagation of uncertainty for the e ciency of stochastic water pollution control were analyzed. The empirical analysis focused on nitrogen pollution of the Baltic Sea from Swedish crop farms. A two moment model (mean and variance) of the distribution of coastal load was developed and integrated with an economic model of arable land-use choice. It was shown that uncertai...
In Indian economy sugarcane has great contribution to GDP. A large population of India depends on the agriculture sector for livelihood. At, the same time, due to expanding population , diminishing arable land and rising service industry, there is need to increase the production by utilizing the available agriculture resources. This paper represents a linear goal programming model for sugarcane...
Concerns about population growth historically revolved around the notion that there may be insufficient arable land, minerals or energy to meet the needs of an exponentially increasing population. Today they are compounded by fears that as wealth increases, so would consumption of natural resources, and that new technologies would enable further exploitation of these resources. Absent empirical...
Soil erosion is a major environmental threat to the sustainability and productive capacity of agriculture. During the last 40 years, nearly one-third of the world's arable land has been lost by erosion and continues to be lost at a rate of more than 10 million hectares per year. With the addition of a quarter of a million people each day, the world population's food demand is increasing at a ti...
The prudent peasant mitigated the risk of crop failures by scattering his arable land throughout his village, Deirdre McCloskey argued, because alternative risksharing institutions did not exist. But, alternatives did exist, this essay concludes. Medieval English peasants formed two types of farmers’ cooperatives. Fraternities protected members from the perils of everyday life. Customary poor l...
Farmland biodiversity is strongly declining in most of Western Europe, but still survives in traditional low intensity agricultural landscapes in Central and Eastern Europe. Accession to the EU however intensifies agriculture, which leads to the vanishing of traditional farming. Our aim was to describe the pollinator assemblages of the last remnants of these landscapes, thus set the baseline of...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید