نتایج جستجو برای: cultivated land size

تعداد نتایج: 687875  

ژورنال: علوم آب و خاک 2014
حامد کاشی, , سیدعلی اصغر هاشمی, , صمد امامقلی زاده, , هادی قربانی, ,

Change in land use and tillage practices has great influence on soil physical and chemical properties. The present study has focused on the effects of converting undisturbed soil to agricultural lands. Chemical and physical soil properties, infiltration, cation exchange capacity (CEC), electrical conductivity, pH, bulk density, porosity, sodium, potassium, total Ca + Mg, organic matter percenta...

2000
Edward B. Barbier

This paper focuses on the potential role of policy in influencing the poverty and land degradation problems facing Africa. This is done through exploring a few case studies, chosen from a broad spectrum of African countries — Sudan, Malawi, Nigeria, Ghana and Kenya. The first case study examines the comparative returns to the gum arabic agroforestry system cultivated by poor farmers in Northern...

2015
Marcela S. Montecchia Micaela Tosi Marcelo A. Soria Jimena A. Vogrig Oksana Sydorenko Olga S. Correa

The Southern Andean Yungas in Northwest Argentina constitute one of the main biodiversity hotspots in the world. Considerable changes in land use have taken place in this ecoregion, predominantly related to forest conversion to croplands, inducing losses in above-ground biodiversity and with potential impact on soil microbial communities. In this study, we used high-throughput pyrosequencing of...

2011
BHAGAWAT RIMAL

Urban development has enlarged the modification of natural resources and has changed land use and land cover patterns. Urbanization is a process of increase of modernization system which modifies the socioeconomic activities and revolutionizes the land use practice according to time frame. Due to the proximate and underlying causes, land use and land cover change has become the main challenge o...

Farmers can only be market oriented if his/her production plan follows market signals and produce commodities that is more marketable. In other to achieve this, this study provided empirical evidence on the Gender analyses of market orientation in South Eastern, Nigeria. A stratified sampling design was used to select 360 sample respondents in 2017. Market Orientation Index (MOI) and Heckit sel...

2004
COLIN VANCE JACQUELINE GEOGHEGAN

The authors analyze the consequences of imperfect output markets for the land-use decisions of semi-subsistence farmers in an agricultural frontier of southern Mexico. The approach is motivated by previous applications of the agriculture household model establishing that the farm household’s production and consumption decisions are analytically nonseparable when markets are not used. Econometri...

Journal: :Sustainability 2021

Land use in traditional village clustering areas often exhibits slight dynamic changes; however, significant hidden ecological hazards may be present local settlements. There is still a lack of risk assessments for the corresponding classification-based prevention strategies and landscape ecosystem attributes’ enhancement. Based on land-use changes, this study integrated structure function to e...

2016
Yuluan Zhao Xiubin Li

A scientific definition of the type of mountain area and an exploration of the spatial correlation between different types of mountain areas and regional land use at the county level are important for reasonable land resource utilization and regional sustainable development. Here, a geographic information system was used to analyze digital elevation model data and to define the extent of mounta...

Journal: :Genome 2005
A Ricroch R Yockteng S C Brown S Nadot

Allium L. (Alliaceae), a genus of major economic importance, exhibits a great diversity in various morphological characters and particularly in life form, with bulbs and rhizomes. Allium species show variation in several cytogenetic characters such as basic chromosome number, ploidy level, and genome size. The purpose of the present investigation was to study the evolution of nuclear DNA amount...

Journal: :ecopersia 2014
zeinab jafarian jeloudar sara shabanzadeh ataollah kavian maryam shokri

since the change of land use accrued in the iran, especially in northern iran, this research aims tocompare the spatial variability of soil properties in three adjacent land uses including cultivated by wheat lands, grazing lands and forest lands covered by juniperus sp,  fagus orientalis, quercus castanifolia, and acer velotinum species in kiasar region, mazandaran province, northern iran. som...

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