نتایج جستجو برای: cultivated land size

تعداد نتایج: 687875  

Journal: :international journal of agricultural management and development 2015
ali mohammadi torkashvand shahryar sobhe zahedi

an important factor in sustainable agriculture and economic management is to calculate areas under different crops that the inputs of agriculture connect to this topic. planning of agricultural mechanization, fertilizer and pesticide requirements, pests and diseases control, estimates of agricultural production, income and tax and financial planning, all linked to the cultivated areas and estim...

2000
K. R. Islam R. R. Weil

Human population pressures upon land resources have increased the need to assess impacts of land use change on soil quality. In order to assess effects of land use changes on soil quality properties in a tropical forest ecosystem of Bangladesh, soil samples were collected from adjacent well-stocked Shorea robusta natural forest, land reforested with Acacia, grassland and cultivated land. Land u...

2017
Yiping Li Jianjun Zhao Xiaoyi Guo Zhengxiang Zhang Gang Tan Jihong Yang

Grassland, as one of the most important ecosystems on Earth, experiences fires that affect the local ecology, economy and society. Notably, grassland fires occur frequently each year in northeastern China. Fire occurrence is a complex problem with multiple causes, such as natural factors, human activities and land use. This paper investigates the disruptive effects of grassland fire in the nort...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2011
Juan Carlos Laso Bayas Carsten Marohn Gerd Dercon Sonya Dewi Hans Peter Piepho Laxman Joshi Meine van Noordwijk Georg Cadisch

In a tsunami event human casualties and infrastructure damage are determined predominantly by seaquake intensity and offshore properties. On land, wave energy is attenuated by gravitation (elevation) and friction (land cover). Tree belts have been promoted as "bioshields" against wave impact. However, given the lack of quantitative evidence of their performance in such extreme events, tree belt...

2013
Joseph Kihoro Njoroge J Bosco Hunja Murage

Land suitability analysis is a prerequisite to achieving optimum utilization of the available land resources. Lack of knowledge on best combination of factors that suit production of rice has contributed to the low production. The aim of this study was to develop a suitability map for rice crop based on physical and climatic factors of production using a Multi-Criteria Evaluation (MCE) & GIS ap...

2016
Elisabeth Hettig Jann Lay Florian Schierhorn

This paper reviews 91 recent empirical and theoretical studies that analyzed land-use change at the farm-household level. The review builds on a conceptual framework of land-use change drivers and conducts a meta-analysis. Results show that the conversion of forests into cultivated land or grassland, mainly used for agriculture or ranching, are most frequently analyzed. Only a small number of s...

2016
Zhanqi Wang Bingqing Li

Land use change is one of the fundamental influence factors of human life and well-being. The land use change due to the unprecedented urbanization in China not only causes an increase of resource consumption and threatens food security, but also affects the people’s living standard which deserves our attention. This study aims to reveal the impacts of land use change on residents’ living stand...

2018
Christina Bogner Bumsuk Seo Dorian Rohner Björn Reineking

Many environmental data are inherently imbalanced, with some majority land use and land cover types dominating over rare ones. In cultivated ecosystems minority classes are often the target as they might indicate a beginning land use change. Most standard classifiers perform best on a balanced distribution of classes, and fail to detect minority classes. We used the synthetic minority oversampl...

2002
D. Solomon F. Fritzsche J. Lehmann W. Zech

requires analytical methods that can (i) accurately monitor changes in the amount, nature, and dynamics of We used natural 13C abundance coupled with particle-size fractionSOM pools in natural and human-influenced systems ation to evaluate soil organic carbon (SOC) dynamics following deforand (ii) estimate C fluxes between the soils and atmoestation and subsequent cultivation in the subhumid Et...

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