نتایج جستجو برای: land farming

تعداد نتایج: 139714  

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...

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2009
D. HOBART HOUGHTON

After the conquest of Southern Africa in the nineteenth century, certain areas remained in occupation by various Bantu tribes, and, by the Land Act of 1913, Africans were given the sole right of occupation of these areas, but were restricted in their rights to acquire land outside them. The Native Trust and Land Act of 1936 made provision for additional land for Native occupation, so that the R...

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2009
Chengyun Li Xiahong He Shusheng Zhu Huiping Zhou Yunyue Wang Yan Li Jing Yang Jinxiang Fan Jincheng Yang Guibin Wang Yunfu Long Jiayou Xu Yongsheng Tang Gaohui Zhao Jianrong Yang Lin Liu Yan Sun Yong Xie Haining Wang Youyong Zhu

Traditional farming practices suggest that cultivation of a mixture of crop species in the same field through temporal and spatial management may be advantageous in boosting yields and preventing disease, but evidence from large-scale field testing is limited. Increasing crop diversity through intercropping addresses the problem of increasing land utilization and crop productivity. In collabora...

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2004
Hongli Feng Lyubov A. Kurkalova Catherine L. Kling Philip W. Gassman

The study develops a conceptual framework for analyzing the allocation of conservation funds via selectively o ering incentive payments to farmers for enrolling in one of two mutually exclusive agricultural conservation programs: retiring land from production or changing farming practices on land that remains in production. We investigate how the existence of a prexed budget allocation between ...

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Journal: :Environmental management 2004
Christian Schleyer

As in many fen land regions in East Germany, long-standing intensive arable farming--enabled by reclamation--has caused soil deterioration and high water runoff in the Schraden region. The more than ten years of economic and political transformation that followed the breakdown of the socialist regime has worsened the situation and even added new problems. The visible consequences are droughts i...

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2009

More than 60% of British agricultural land is grassland and much of it, particularly the hills and uplands, is unsuitable for other crops. Semi-permanent rough grazing and improved grasslands play an important role in locking up carbon dioxide and regulating the flow of rain into water courses. Without livestock farming, those natural resources would be abandoned and the landscape would soon ch...

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2004
Frances Harris

Small−holder farming in semi−arid areas is being forced to change to compensate for the needs of more people living under conditions of increasingly variable rainfall. As more land is used for agriculture, rangeland areas are reduced, so limiting the availability of animal fodder. The length of fallow periods where soil fertility may be restored is also reduced. This has forced herders and farm...

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Journal: :آب و خاک 0
علی آزموده عطااله کاویان کریم سلیمانی قربان وهاب زاده

abstract land use change, especially natural ecosystems transformation, has high effects on soil physico-chemical as well as biological characteristics and also, has effect on runoff and soil erosion. analysis of runoff and soil erosion dynamics can be useful in improvement of management proposals and quantifying runoff and soil erosion changes. so, this research was carried out to investigate ...

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2017
Ivan Portoghese Giacomo Giannoccaro

Agriculture and farming worldwide are responsible for numerous environmental threats, 11 including degradation of land and water resources depletion. Underlining the dynamic interaction 12 between bio-physical and socio-economic drivers is the key towards a more sustainable land and 13 water management. With regard to a highly developed agricultural area in southern Italy, 14 multi-regression m...

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2002
Marco Boscolo Ramiro Molina Robert Wade Elinor Ostrom Daniel Bromley

In rural areas of developing countries, farming systems tend to be household-based. These household production systems are also highly integrated with land-based natural resources such as forests, range areas and pasture lands. Households depend on these resources for fuels, animal food, building materials, fruits and medicines, and often these resources have ownership and control structures th...

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  • " +i+ "
    • "; pgn_html+=pgn_li; } document.getElementById("pgn-ul").innerHTML=pgn_html var pgn_links = document.querySelectorAll('.mypgn'); pgn_links.forEach(function(pgn_link) { pgn_link.addEventListener('click', paginate) }) } function post_and_fetch(data,url) { showLoading() xhr = new XMLHttpRequest(); xhr.open('POST', url, true); xhr.setRequestHeader('Content-Type', 'application/json; charset=UTF-8'); xhr.onreadystatechange = function() { if (xhr.readyState === 4 && xhr.status === 200) { var resp = xhr.responseText; resp_json=JSON.parse(resp) resp_place = document.getElementById("search_result_div") resp_place.innerHTML = resp_json['results'] search_meta = resp_json['meta'] update_search_meta(search_meta) update_pagination() hideLoading() } }; xhr.send(JSON.stringify(data)); } function unfilter() { url=/search_year_filter/ var term=document.getElementById("search_meta_data").dataset.term var data={ "year":"unfilter", "term":term, "pgn":1 } filtered_res=post_and_fetch(data,url) } function deactivate_all_bars(){ var yrchart = document.querySelectorAll('.ct-bar'); yrchart.forEach(function(bar) { bar.dataset.active = false bar.style = "stroke:#71a3c5;" }) } year_chart.on("created", function() { var yrchart = document.querySelectorAll('.ct-bar'); yrchart.forEach(function(check) { check.addEventListener('click', checkIndex); }) }); function checkIndex(event) { var yrchart = document.querySelectorAll('.ct-bar'); var year_bar = event.target if (year_bar.dataset.active == "true") { unfilter_res = unfilter() year_bar.dataset.active = false year_bar.style = "stroke:#1d2b3699;" } else { deactivate_all_bars() year_bar.dataset.active = true year_bar.style = "stroke:#e56f6f;" filter_year = chart_data['labels'][Array.from(yrchart).indexOf(year_bar)] url=/search_year_filter/ var term=document.getElementById("search_meta_data").dataset.term var data={ "year":filter_year, "term":term, "pgn":1 } filtered_res=post_and_fetch(data,url) } } function showLoading() { document.getElementById("loading").style.display = "block"; setTimeout(hideLoading, 10000); // 10 seconds } function hideLoading() { document.getElementById("loading").style.display = "none"; } -->