نتایج جستجو برای: agricultural used land

تعداد نتایج: 2401809  

2016
Dereje Teklemariam Hossein Azadi Jan Nyssen Mitiku Haile Frank Witlox

Due to the nature of available land as one of the main attractions for investment, land lease marketing in Sub-Saharan Africa is appearing on policy agenda. This paper describes critical land-related institutional and governmental frameworks that have shaped the contemporary land governance and land lease contracts in Ethiopia. It also examines the effectiveness of the land lease process regard...

2002
Izaque F. C. Mendonça Francisco Lombardi Ricardo A. Viégas

The growing expansion of agricultural activities without consideration of the potentialities and limitations of land constitutes a potential source of environment degradation. This work aimed to evaluate the physical proprieties of lands in the micro bosin of Una, Sapé in the state of Paraiba, Brazil, using the classification of the land use capacity . The area is located in the eastern part of...

Journal: :Environmental management 2005
Jeffrey D Kline

Oregon's land-use planning program is often cited as an exemplary approach to forest and farmland conservation, but analyses of its effectiveness are limited. This article examines Oregon's land-use planning program using detailed spatial data describing building densities in western Oregon. An empirical model describes changes in building densities on forest and agricultural lands from 1974 to...

Journal: :Trans. GIS 2008
Alexis J. Comber Chris Proctor Steve Anthony

Agricultural Census data is summarised over spatially course reporting units for reasons of farm confidentiality. This is problematic for research at a local level. This paper describes an approach combining dasymetric and volume preserving techniques to create a national land use dataset at 1km resolution. The results for an English county are compared with contemporaneous aggregated habitat d...

Journal: :The American journal of tropical medicine and hygiene 2015
Douglas J McCauley Daniel J Salkeld Hillary S Young Rhodes Makundi Rodolfo Dirzo Ralph P Eckerlin Eric F Lambin Lynne Gaffikin Michele Barry Kristofer M Helgen

Understanding the effects of land-use change on zoonotic disease risk is a pressing global health concern. Here, we compare prevalence of Yersinia pestis, the etiologic agent of plague, in rodents across two land-use types-agricultural and conserved-in northern Tanzania. Estimated abundance of seropositive rodents nearly doubled in agricultural sites compared with conserved sites. This relation...

2015
Pasquale Borrelli

The current state of the art in erosion research does not provide answers about the “where” and “when” of wind erosion in European agricultural lands. Questions about the implications for the agricultural productivity remain unanswered. Tackling this research gap, the study provides a more comprehensive understanding of the spatial patterns of land susceptibility to wind erosion in European agr...

2011
Pranab Bardhan Haochi Zheng Paul Glewwe Stephen Polasky Jintao Xu

Since 1999, China has spent RMB 50 billion (about US$7 billion) to implement the ‘Grain for Green’ programme, the largest land retirement programme in the developing world. From 1999 to 2003, over 7.2 million hectares of agricultural land were retired under the programme. However, many farmers report that they did not receive the compensation promised under the programme in exchange for plantin...

2015
Huiyong Sang Liang Zhai Jixian Zhang Fang An

With the improvement of remote sensing technology, the spatial, structural and texture information of land covers are present clearly in high resolution imagery, which enhances the ability of crop mapping. Since the satellite RapidEye was launched in 2009, high resolution multispectral imagery together with wide red edge band has been utilized in vegetation monitoring. Broad red edge band relat...

2014
Bhartendu Pandey Qingling Zhang Karen C. Seto

Urban expansion is one of the major drivers of agricultural lands loss. However, current remote sensing-based efforts to monitor this process are limited to small scale case studies that require much user input. Given the rate and magnitude of contemporary urbanization, there is a need to develop a land change algorithm that can characterize the loss of agricultural land at large scales over lo...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2015
Rebecca Chaplin-Kramer Richard P Sharp Lisa Mandle Sarah Sim Justin Johnson Isabela Butnar Llorenç Milà I Canals Bradley A Eichelberger Ivan Ramler Carina Mueller Nikolaus McLachlan Anahita Yousefi Henry King Peter M Kareiva

The agricultural expansion and intensification required to meet growing food and agri-based product demand present important challenges to future levels and management of biodiversity and ecosystem services. Influential actors such as corporations, governments, and multilateral organizations have made commitments to meeting future agricultural demand sustainably and preserving critical ecosyste...

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