نتایج جستجو برای: agricultural land

تعداد نتایج: 204615  

2012
Alexander V Prishchepov Volker C Radeloff Matthias Baumann Tobias Kuemmerle Daniel Müller

Institutional settings play a key role in shaping land cover and land use. Our goal was to understand the effects of institutional changes on agricultural land abandonment in different countries of Eastern Europe and the former Soviet Union after the collapse of socialism. We studied ∼273 800 km2 (eight Landsat footprints) within one agro-ecological zone stretching across Poland, Belarus, Latvi...

ژورنال: علوم آب و خاک 2014
رئیسی, فایز, صالحی, محمدحسن, کریمی, رضا,

Improper use of rangelands may lead to their destruction. Therefore, the conversion of these degraded rangelands to agricultural lands and other land uses may improve their soil quality. The purpose of the present study was to evaluate the impact of cultivation in the degraded rangelands on some soil characteristics in Safashahr region of Fars province. Four land uses including the rangeland wi...

2016
Robert J. Zomer Henry Neufeldt Jianchu Xu Antje Ahrends Deborah Bossio Antonio Trabucco Meine van Noordwijk Mingcheng Wang

Agroforestry systems and tree cover on agricultural land make an important contribution to climate change mitigation, but are not systematically accounted for in either global carbon budgets or national carbon accounting. This paper assesses the role of trees on agricultural land and their significance for carbon sequestration at a global level, along with recent change trends. Remote sensing d...

2005
Julia Roehrig Gunter Menz

Agricultural productivity is determined and limited in general by a combination of the natural environment and technical measures. If non-capital intensive management is assumed, the natural potential and constraints are of specific importance for the agricultural land use and its productivity. In this context, the Potsdam Institute for Climate Impact Research (PIK) in cooperation with the Max ...

2016
Zhiwei Wang Shengtian Yang Changsen Zhao Juan Bai Hezhen Lou Ke Chen Linna Wu Guotao Dong Qiuwen Zhou Mustafa M. Aral

The transport characteristics of phosphorus in soil and the assessment of its environmental risk have become hot topics in the environmental and agricultural fields. The Sanjiang Plain is an important grain production base in China, and it is characterised by serious land use change caused by large-scale agricultural exploitation. Agricultural inputs and tillage management have destroyed the so...

2012
John W. Recha Johannes Lehmann M. Todd Walter Alice Pell Louis Verchot Mark Johnson

Tropical Africa is affected by intense land-use change, particularly forest conversion to agricultural land. In this study, the stream discharge of four small headwater catchments located within an area of 6 km in western Kenya was examined for 2 years (2007 and 2008). The four catchments cover a degradation gradient ranging from intact forest to agricultural land under maize cultivation for 5,...

2012
Hang Chen Guifen Chen

China is a populous agricultural country, the arable land is the most basic resources which is needed for agricultural production, the quality of arable land has a direct impact on the entire agricultural production and development ,so to carry out the Evaluation of Farmland is a very important foundation work which is advantage to know china’s arable land resources and to improve the efficienc...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2010
Allison M Thomson Katherine V Calvin Louise P Chini George Hurtt James A Edmonds Ben Bond-Lamberty Steve Frolking Marshall A Wise Anthony C Janetos

Land-use change to meet 21st-century demands for food, fuel, and fiber will depend on many interactive factors, including global policies limiting anthropogenic climate change and realized improvements in agricultural productivity. Climate-change mitigation policies will alter the decision-making environment for land management, and changes in agricultural productivity will influence cultivated...

2006

Despite the apparent abundance of land, agricultural land with a dependable growing period represents a fraction of the total land area in Ethiopia. Moreover, land degradation is extensive and severe, particularly in the highlands above 1500 meters above sea level, which account for about 40 percent of the total land area but home for 90 percent of the total population and 70 percent of livesto...

2012
Stella O. Odebode

Agricultural development has been a major concern to most developing countries within the last two decades. It represents a cluster of six related but separate concepts; agricultural expansion; increased production per acre of cropped land or per head of livestock; agricultural growth; a situation characterized with agricultural products per agricultural worker, rising income per person employe...

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