نتایج جستجو برای: so decrease biodiversity increase agricultural value added

تعداد نتایج: 2313345  

    One of the factors that have a significant impact on the economic development of countries is reliance on foreign trade, and due to the dependence of countries on export earnings and the import of foreign trade, it plays an essential and indisputable role in the growth and development of different sectors. Foreign trade in agricultural products has an important role in expanding the export...

Journal: تعلیم و تربیت 2014
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The Effect of Educational Expenditures on Added Value in Industrial Sector K. Shahbaazi, Ph.D. M. Hassani, Ph.D. N. Shahbaazi Since 78% of the work force in Iranian industries consists of those holding a high school diploma or less, any investment in increasing this level of education could lead to an increase in the added value in the industrial sector. Analyses of the availabl...

Journal: :اقتصاد و توسعه کشاورزی 0
محمدرضا لطفعلی پور یداله آذرین فر رویا محمد زاده

considering the importance of the agriculture sector in iran, this study investigated factors affecting economic growth and development of the agriculture sector in iran over the period of 1967-2009 for short term and long term, using ardl model. the results showed that the ratios of public investment expenditure to the gdp for short-term and long term have positive impacts on the economic grow...

Journal: :Ecology letters 2011
Lenore Fahrig Jacques Baudry Lluís Brotons Françoise G Burel Thomas O Crist Robert J Fuller Clelia Sirami Gavin M Siriwardena Jean-Louis Martin

Biodiversity in agricultural landscapes can be increased with conversion of some production lands into 'more-natural'- unmanaged or extensively managed - lands. However, it remains unknown to what extent biodiversity can be enhanced by altering landscape pattern without reducing agricultural production. We propose a framework for this problem, considering separately compositional heterogeneity ...

2014
Samson Okongo Mabwoga Ashwani Kumar Thukral

The increasing population in the developing countries has rendered wetlands vulnerable to land use changes. Remote sensing offers a rapid and efficient means of data acquisition of ecosystems in time and space. The present study was undertaken to identify changes in the Harike wetland, a Ramsar site in the state of Punjab, India; and identify causal factors, as well as vulnerable areas threaten...

Journal: :Ecology and evolution 2016
François Gillet Leslie Mauchamp Pierre-Marie Badot Arnaud Mouly

Understanding how land-use changes affect different facets of plant biodiversity in seminatural European grasslands is of particular importance for biodiversity conservation. As conclusions of previous experimental or synchronic observational studies did not converge toward a general agreement, assessing the recent trends in vegetation change in various grassland systems using a diachronic appr...

2004
Mark Schildhauer

This Distributed Graduate Seminar (DGS) aims to synthesize current ecological information on the role that biodiversity in agricultural landscapes (agrobiodiversity) plays in providing ecosystem services. In recent years numerous studies aimed at examining the importance of agroecosystems to the conservation of biodiversity have been published. These studies focus on identifying the types of ag...

Journal: :اقتصاد و توسعه کشاورزی 0
فاطمه علیجانی ماشااله سالارپور محمود صبوحی

considering the importance of the impact of subsidy reform on the agricultural sector, the study aimed at understanding consequences of changes in the rates of production subsidy using general equilibrium model based on input-output table in the year 2001.the study conducted based on three scenarios containing step, down and finally removed rates of production subsidy. the effects on production...

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