Achieving better understanding phosphorus (P) flows through urban ecosystems is needed to conserve P, as non-renewable phosphate rock deposits become depleted and the global human population increases. A baseline mass flow analysis (MFA) for P developed for the Twin Cities Watershed (TCW, which includes most of the Minneapolis-St. Paul metropolitan region) showed that most P input was stored in...

Irrigated agriculture can modify the cycling and transport of nitrogen (N), due to associated water diversions, water losses, and changes in transport flow-paths. We investigate dominant processes behind observed long-term changes in dissolved inorganic nitrogen (DIN) concentrations and loads of the extensive (465,000 km2) semi-arid Amu Darya River basin (ADRB) in Central Asia. We specifically ...

Acemoglu, D., 34n1, 270 Aflatoxins, 50, 66 Africa commodity characteristics in, 234 comparative perspective of commodity characteristics overview, 221, 224 non-traditional export crops, 223–224 staple food crops, 221–222 traditional export crops, 222–223 food exports from, 4, 50 income, effect on high standards economy, 148 liberalization in overview, 9, 235 liberalization process, 240 non-trad...

Economic growth is an increase in productive capacity of economy. There different school thought on economic including from the classical to solo-swan theories. Export sector country were seen as engine through economies scale, accessing markets and expanding trade. This study was conducted order investigate relationship between export growth, special focusing agricultural (meat, live animal le...

Targeting of agricultural conservation practices to the most effective locations in a watershed can promote wise use of conservation funds to protect surface waters from agricultural nonpoint source pollution. A spatial optimization procedure using the Soil and Water Assessment Tool was used to target six widely used conservation practices, namely no-tillage, cereal rye cover crops (CC), filter...

Increasing diffuse nitrate loading of surface waters and groundwater has emerged as a major problem in many agricultural areas of the world, resulting in contamination of drinking water resources in aquifers as well as eutrophication of freshwaters and coastal marine ecosystems. Although empirical correlations between application rates of N fertilizers to agricultural soils and nitrate contamin...

Giant? The Potentials and the Pitfalls1 In 2009 the World Bank published a report entitled Awakening Africa’s Sleeping Giant: Prospects for Commercial Agriculture in the Guinea Savannah Zone and Beyond. The report highlights the agricultural potential of Africa’s Guinea Savannah (henceforth GS) zone, which it describes as “one of the largest underused agricultural land reserves in the world” (p...

DomansKa, K., T. KijeK and a. nowaK, 2014. agricultural total factor productivity change and its determinants in european Union countries. Bulg. J. Agric. Sci., 20: 1273-1280 The present study concerns the measurement of changes in agricultural total factor productivity in 27 european Union (eU) countries. The analysis included the years 2007--2011. The study was conducted based on malmquist pr...

Plant diseases are a significant constraint to agricultural productivity. Exotic plant diseases pose a continued threat to profitable agriculture in the United States. The extent of this threat has increased dramatically in the 1980s and 1990s due to the expansion of international trade in agricultural products and frequent movement of massive volume of people and goods across national boundari...

This paper examines the environmental-economic cycle for nitrogen in Denmark based on nitrogen input and output from different economic sectors. An input-output model is employed together with a nitrogen mass balance to apportion total nitrogen loading by final demand and estimate export and import of nitrogen from foreign trade. The changes in agricultural and industrial nitrogen loading from ...