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The global rice agriculture towards 2050: An inter-continental perspective 面向2050年的全球水稻农业:一个洲际视角
IF 3 3区 经济学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2022-06-01 DOI: 10.1177/00307270221088338
P. Samal, S. Babu, B. Mondal, S. N. Mishra
The growth in rice consumption has either slowed down or become negative in all the continents although additional per capita demand for rice exists in Africa. The future additional rice demand will mainly come from the population growth in Africa and Asia. The production growth during the past led by growth in yield has helped in meeting rice demand around the globe. However, Africa continues to lag far behind other continents in achieving the desired level of yield. Additional research efforts are needed in all continents for the production of varieties with higher yield potential and desired grain quality with more emphasis on the African continent. The global demand for rice will be about 584 million tons or less towards 2050. With positive technological developments in the rice research arena, the shape of rice agriculture will change towards 2050. Asia may lose about 5 million ha and Africa gain about 10 million ha of rice land by 2050.
尽管非洲对大米的人均需求增加,但所有大陆的大米消费增长要么放缓,要么呈负增长。未来对大米的额外需求将主要来自非洲和亚洲的人口增长。过去产量增长带动的产量增长有助于满足全球水稻需求。然而,非洲在实现预期产量方面仍然远远落后于其他大陆。需要在各大洲进行更多的研究,以生产具有更高产量潜力和所需粮食质量的品种,并更多地侧重于非洲大陆。到2050年,全球对大米的需求将减少约5.84亿吨。随着水稻研究领域的积极技术发展,到2050年,水稻农业的形态将发生变化。到2050年,亚洲可能损失约500万公顷,非洲可能增加约1000万公顷的水稻地。
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引用次数: 9
Commercialisation of the sweetpotato value chain: Impacts on women producers in Mozambique 红薯价值链的商业化:对莫桑比克妇女生产者的影响
IF 3 3区 经济学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2022-06-01 DOI: 10.1177/00307270221105533
S. Mayanja, N. Mudege, K. Snyder, N. Kwikiriza, E. Munda, J. Achora, Fredrick E Grant
Traditionally, sweetpotato is a woman's crop grown primarily for food in Mozambique. With the introduction of Vitamin A rich varieties, efforts were made to commercialize the crop. This study assessed the effects of this commercialization on women producers. Findings indicate that though women devoted more land to sweetpotato, men got higher yields, sold more and obtained better prices. Nonetheless, women dominated the roots value chain and increased their participation in markets. The more lucrative sweetpotato vine chain was dominated by men (75% men), as the resources and skills required to engage in this activity were a significant challenge for women. Women perceived that sweetpotato commercialization increased their ability to make production decisions, though it has not resulted in any changes in ownership of resources. Women and men both noted a subtle change in norms. Men for example perceived that their ability to make decisions had reduced, while women noted that they had taken on more leadership positions locally. These changes might be attributed to the role played by project implementors who encouraged men to allow their spouses to engage more in commercial activities. Whilst women faced challenges related to literacy, market entry and access to resources, they valued the experience obtained in improving their entrepreneurial skills. Future commercialization initiatives should work on linking women to business services and building stronger farmer-processer linkages. Efforts to sensitize men about the benefits of women's engagement in business showed some impact and should be included in further work on crop commercialization.
传统上,红薯是莫桑比克妇女种植的主要粮食作物。随着富含维生素A的品种的引进,人们努力将这种作物商业化。这项研究评估了这种商业化对女性生产者的影响。研究结果表明,尽管女性将更多的土地用于红薯,但男性获得了更高的产量,卖出了更多的红薯,并获得了更好的价格。尽管如此,妇女在根的价值链中占主导地位,并增加了她们对市场的参与。利润更丰厚的红薯藤链由男性主导(75%为男性),因为从事这项活动所需的资源和技能对女性来说是一个重大挑战。妇女认为,红薯商业化提高了她们做出生产决策的能力,尽管这并没有导致资源所有权的任何变化。女性和男性都注意到了规范的微妙变化。例如,男性认为他们的决策能力下降了,而女性则指出,他们在当地担任了更多的领导职位。这些变化可能归因于项目实施者所扮演的角色,他们鼓励男性允许配偶更多地参与商业活动。尽管妇女面临着与识字、进入市场和获得资源有关的挑战,但她们重视在提高创业技能方面获得的经验。未来的商业化举措应致力于将妇女与商业服务联系起来,并建立更牢固的农民与加工者的联系。提高男子对妇女参与商业的好处的认识的努力显示出一定的影响,应纳入作物商业化的进一步工作中。
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引用次数: 0
The role of small abattoirs in the delivery of the UK's new agricultural policy objectives 小型屠宰场在实现英国新农业政策目标中的作用
IF 3 3区 经济学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2022-05-26 DOI: 10.1177/00307270221103293
J. Franks, Rachel S E Peden
This study examines the impacts of the reduction in the network of private kill abattoirs on the delivery of public goods supported under the redesigned UK agriculture policy. An online survey was used to gather information about farmers selection and use of abattoirs, and a telephone survey of abattoir owners and managers complemented the farmer survey. Of the 300 respondents, 185 used abattoirs for private kill retail (PKR) services. 121 of these PKR farmers (65.4%) reported their PKR business as “essential” “or “very important” to the viability of their farm business. Seventy-five (41%) had no alternative abattoir, 21 of these 75 would have to close their PKR business if the abattoir they currently used closed, 22.7% would reduce their grassland area, releasing greenhouse gases, and 30% would stop farming native breeds, reducing the gene pool and conservation grazing environmental management options. 110 PKR farmers did have a viable alternative abattoir, but using it would increase livestock journeys, increasing greenhouse gas emissions and making it more likely farmers would need to use commercial rather than farm transport, further jeopardising animal welfare and biosecurity. Therefore, the continuing closure of private kill services threatens core government policy objectives. However, private kill services could be supported by government grant schemes, resolving confusion regarding food labelling, and reducing small abattoir costs by introducing “de minimis” derogation – as currently used on some Channel Island and mainland Europe abattoirs.
这项研究考察了私人屠宰场网络的减少对重新设计的英国农业政策支持的公共产品交付的影响。一项在线调查用于收集农民选择和使用屠宰场的信息,一项针对屠宰场所有者和管理人员的电话调查补充了农民调查。在300名受访者中,185人使用屠宰场提供私人屠宰零售服务。121名PKR农民(65.4%)表示,他们的PKR业务对其农场业务的生存能力“至关重要”或“非常重要”。75%(41%)的人没有其他屠宰场,如果他们目前使用的屠宰场关闭,其中21人将不得不关闭PKR业务,22.7%的人将减少草原面积,释放温室气体,30%的人将停止种植本地品种,减少基因库和保护性放牧环境管理选择。110 PKR农民确实有一个可行的替代屠宰场,但使用它会增加牲畜的行程,增加温室气体排放,使农民更有可能需要使用商业运输而不是农场运输,从而进一步危及动物福利和生物安全。因此,私人杀人服务的持续关闭威胁到政府的核心政策目标。然而,私人屠宰服务可以得到政府拨款计划的支持,解决食品标签方面的混乱,并通过引入“最低限度”的减损来降低小型屠宰场的成本——正如目前海峡岛和欧洲大陆的一些屠宰场所使用的那样。
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引用次数: 3
Banana seed exchange networks in Burundi – Linking formal and informal systems 布隆迪香蕉种子交换网络-连接正式和非正式系统
IF 3 3区 经济学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2022-05-25 DOI: 10.1177/00307270221103288
I. Nduwimana, S. Sylla, Y. Xing, A. Simbare, C. Niyongere, K. Garrett, Aman Bonaventure Omondi
Seed system network analysis can reveal exchange connections between stakeholders and test scenarios such as those of seed systems shocks. We investigated the seed exchange network structure, disease surveillance risk, and gender contribution in Burundi, under two banana disease risk scenarios. Two sites where banana bunchy top disease (BBTD) is endemic in Cibitoke Province were compared with a site free of the disease in Gitega Province. All sites had formal seed interventions using community nurseries. A quantitative survey on seed sharing was done followed by a qualitative evaluation through focus group discussions. Banana seed sourcing options were fewer in the disease-free site, which also had higher cultivar diversity. Most farmers sourced seed informally within a three-kilometer radius. Seed sharing within and between villages was based on social and family linkages, especially for women. The interaction between the formal system and informal seed exchange was more active where new cultivars, or better seed quality was expected. The BBTD endemic region had lower seed quality assessment stringency. Farmers used both direct mother plant assessment and seed source reputation in seed evaluation. The formal banana seed systems are sources of new varieties, and trusted for clean seed but the informal system was still used as a main source of seed, especially local cultivars. Assessing disease surveillance scenarios shows women in a weaker position for healthy seed acquisition. Identifying the roles of individuals in seed systems can support decision processes for seed interventions in vegetatively propagated crops.
种子系统网络分析可以揭示利益相关者之间的交换联系以及种子系统冲击等测试场景。我们调查了布隆迪在两种香蕉疾病风险情景下的种子交换网络结构、疾病监测风险和性别贡献。对锡比托克省两个香蕉束顶病流行点与基特加省一个无病点进行了比较。所有地点都采用社区苗圃进行正式的种子干预。对种子共享进行了定量调查,并通过焦点小组讨论进行了定性评价。香蕉种子来源选择在无病地较少,品种多样性也较高。大多数农民在方圆3公里的范围内非正式地获取种子。村庄内部和村庄之间分享种子是建立在社会和家庭联系的基础上的,对妇女来说尤其如此。在期望培育新品种或提高种子质量的地方,正式制度与非正式种子交换之间的相互作用更为活跃。黑斑病流行区种子质量评价严格程度较低。农民在种子评价中采用直接母株评价和种子来源声誉评价两种评价方法。正式的香蕉种子系统是新品种的来源,并被认为是干净的种子,但非正式的系统仍然被用作种子的主要来源,特别是地方品种。对疾病监测情景的评估表明,妇女在获取健康种子方面处于较弱的地位。确定个体在种子系统中的作用可以支持无性繁殖作物种子干预的决策过程。
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引用次数: 2
Drought's implications on agricultural skills in South Africa 干旱对南非农业技能的影响
IF 3 3区 经济学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2022-05-22 DOI: 10.1177/00307270221103289
C. Katiyatiya, Jabulani Majaha, O. Chikwanha, K. Dzama, Nkgaugelo Kgasago, C. Mapiye
Drought is an inevitable feature of South Africa's climate. Its slow onset and recurrence threaten livelihoods dependent on agriculture. Responses to drought have mostly been ex-post impact management with little ex-ante resilience building in vulnerable areas. Implementation of ex-ante strategies has been severely challenged by lack of skilled human capital to predict and respond timely and effectively to the impacts of drought, particularly in smallholder farming areas. Human capital development, should therefore, be prioritised as a key drought management strategy. In this regard, it is important to determine farmers and agricultural professionals’ current and future needs for capacity development in drought management. This is important given that drought is projected to increase risks and introduce new ones with far more devastating impacts on agriculture. The current review outlines the implications of drought on agricultural skills in South Africa and the way forward.
干旱是南非气候的一个不可避免的特点。它的缓慢发作和复发威胁到依赖农业的生计。对干旱的应对大多是事后影响管理,在脆弱地区几乎没有事前恢复能力建设。由于缺乏熟练的人力资本来及时有效地预测和应对干旱的影响,特别是在小农户农业地区,事前战略的实施受到了严重挑战。因此,人力资本开发应作为一项关键的干旱管理战略予以优先考虑。在这方面,重要的是确定农民和农业专业人员目前和未来对干旱管理能力发展的需求。这一点很重要,因为干旱预计会增加风险,并带来新的风险,对农业的破坏性影响要大得多。目前的审查概述了干旱对南非农业技能的影响和前进的道路。
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引用次数: 1
Changing gender role declines maize yield, but remittances offset: Findings from migrant households in the central Himalayas, Nepal 性别角色的改变降低了玉米产量,但汇款抵消了这一影响:来自尼泊尔喜马拉雅山脉中部移民家庭的调查结果
IF 3 3区 经济学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2022-04-28 DOI: 10.1177/00307270221097984
Kishor Atreya, H. Gartaula
In this paper, we investigate the interplay between labor out-migration, changes in gender roles, and their effects on the maize farming system. The paper unravels these interactions using the data collected from 1053 migrant households in the mountains of Nepal. The result shows that household size positively and the number of 17–60-year-old household members negatively influence maize yield. Remittance income and raising farm animals enhanced maize yield. Geography, especially maize farming in the mountains, showed a reduction (25.6%) in yield. The migrants’ wives stated less maize yield (5%) compared to the other household members. In addition to these contextual factors, women's increased participation in the household chores, rearing and caring of farm animals, and community activities significantly compromised maize yield. However, the remittance income offsets the loss. As women's role in agriculture is central, especially in the context of male labor out-migration, gender-transformative approaches to research and development practices would ensure social justice and equitable benefit sharing. Accounting for their choices and preferences in developing and designing agricultural interventions is thus vital for the long-term sustainability of the mountain farming systems.
在本文中,我们研究了劳动力外流、性别角色变化及其对玉米种植系统的影响之间的相互作用。该论文利用从尼泊尔山区1053个移民家庭收集的数据,揭示了这些相互作用。结果表明,家庭规模和17-60岁家庭成员数量对玉米产量有正向影响。汇款收入和饲养家畜提高了玉米产量。地理位置,尤其是山区的玉米种植,显示产量下降(25.6%)。移民的妻子表示,与其他家庭成员相比,玉米产量较低(5%)。除了这些背景因素外,妇女更多地参与家务劳动、饲养和照顾农场动物以及社区活动,严重影响了玉米产量。但是,汇款收入抵消了损失。由于妇女在农业中的作用至关重要,特别是在男性劳动力外流的背景下,研究和开发实践的性别变革方法将确保社会正义和公平的利益分享。因此,考虑到他们在制定和设计农业干预措施时的选择和偏好,对于山区农业系统的长期可持续性至关重要。
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引用次数: 1
Productivity and constraints of small-scale crop farming in the summer rainfall region of South Africa 南非夏季降雨地区小规模作物种植的生产力和制约因素
IF 3 3区 经济学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2022-04-05 DOI: 10.1177/00307270221091839
V. Mathinya, A. Franke, G. V. D. van de Ven, K. Giller
The South African policy sphere hails the commercialisation of small-scale farming as the answer to a myriad of socio-economic, ecological and political challenges of rural livelihoods. Yet the low agricultural productivity of this sector challenges the realisation of this pathway. Through comparison with large-scale farmers, this review sought to elicit the main reasons for differences in productivity and explore the prospects of small-scale farming. It highlights that low productivity of small-scale farming cannot be solely ascribed to biophysical constraints and that differences rather arise at farm and regional level. Therefore, intervention strategies should not be solely sought at field scale, which seems to be the norm. While the prospects of small-scale farming may seem gloomy at first glance, opportunities such as investing in horticulture exist. Prospects for small-scale farming are limited by the country's very competitive and thriving large-scale farming that saturate most agricultural markets. A key conclusion from this review is that we still do not know enough about small-scale farming systems in South Africa. For example, what is the contribution of small-scale farming to the living income of households? Are farming households food and nutrition secure? In particular, the role of agriculture in improving rural livelihoods is poorly understood. Farming is likely to remain an important supplementary livelihood opportunity for the majority of rural households. As such, small-scale farming needs to be rethought as part of a broader livelihood strategy by all stakeholders while continuously seeking alternative entry points towards thriving rural livelihoods. This means provision of support for transition to more commercial farming activities for those with interest and sufficient resources, while alternative employment or social protection is provided for others. A key question for research is what types of farming (crops and livestock) and what scale of operation is needed to achieve commercial success in different regions.
南非政策领域称赞小规模农业的商业化是解决农村生计所面临的无数社会经济、生态和政治挑战的答案。然而,该部门的农业生产率较低,对实现这一途径构成了挑战。通过与规模化农户的比较,本文试图找出造成生产力差异的主要原因,并探讨小规模农户的发展前景。报告强调,小规模农业的低生产力不能完全归咎于生物物理限制,差异是在农场和区域一级产生的。因此,干预策略不应该仅仅在现场规模上寻求,这似乎是常态。虽然小规模农业的前景乍一看似乎很黯淡,但投资园艺等机会是存在的。小规模农业的前景受到该国竞争激烈和蓬勃发展的大规模农业的限制,这种大规模农业使大多数农业市场饱和。这篇综述得出的一个关键结论是,我们对南非的小规模农业系统仍然不够了解。例如,小规模农业对家庭生活收入的贡献是什么?农户的粮食和营养安全吗?特别是,人们对农业在改善农村生计方面的作用知之甚少。农业很可能仍然是大多数农村家庭重要的补充生计机会。因此,所有利益攸关方都需要重新考虑小规模农业,将其作为更广泛的生计战略的一部分,同时不断寻求实现农村生计繁荣的其他切入点。这意味着为那些有兴趣和有足够资源的人提供向更商业化的农业活动过渡的支持,同时为其他人提供替代就业或社会保护。研究的一个关键问题是什么类型的农业(作物和牲畜)以及在不同地区需要多大的经营规模才能取得商业成功。
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引用次数: 3
Understanding the capacity of key actors and their role in the seed potato systems: The case of Eritrea 了解主要行为者的能力及其在种薯系统中的作用:以厄立特里亚为例
IF 3 3区 经济学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2022-03-28 DOI: 10.1177/00307270221088330
Fitsumberhan Ghebremeskel Ghebreagziabiher, D. Griffin, J. Burke, M. Gorman
Understanding the combined effects of the biophysical, socioeconomic, and institutional components of a seed system can help to improve the effectiveness of seed system interventions. This study examined whether and how institutional factors are contributing to the inadequate supply of quality seed potato in Eritrea and identified where and how bottlenecks within the seed systems might improve the efficacy of seed potato interventions. The research methodology included semi-structured interviews with seed potato system actors, focus group discussions with farmers and local experts, a review of seed potato intervention program reports, farm visit reports, and other literature. The study identified some structural system failures that block the effective functioning of the seed potato intervention. The study recommendations include (i) investment in climate-smart technologies (such as water harvesting structures and new varieties) as well as for electricity supply in the high grades seed production center (ii) shifting the traditional supply-driven approach to a demand driven approach for greater participation of the actors in the seed potato intervention (iii) strengthening the human skill of the actors for greater interaction and collaboration between the different government actors and (iv) developing local strategies to encourage decentralized service provision systems. In the longer term, consideration should be given to greater private sector participation in sourcing and supply of seed and other inputs, even as a pilot-scale activity.
了解种子系统的生物物理、社会经济和制度组成部分的综合影响有助于提高种子系统干预措施的有效性。本研究考察了制度因素是否以及如何导致厄立特里亚优质种子马铃薯供应不足,并确定了种子系统中的瓶颈可能在何处以及如何提高种子马铃薯干预措施的效力。研究方法包括与种薯系统参与者的半结构化访谈、与农民和当地专家的焦点小组讨论、对种薯干预计划报告、农场访问报告和其他文献的回顾。该研究确定了一些结构系统故障,阻碍了种子马铃薯干预的有效运作。研究建议包括:(1)投资于气候智能型技术(如集水结构和新品种)以及优质种子生产中心的电力供应;(2)将传统的供应驱动方法转变为需求驱动方法,以使行动者更多地参与种子马铃薯干预;(3)加强行动者的人力技能,以加强不同政府行动者之间的互动和合作制定地方战略以鼓励分散的服务提供系统。长期而言,应考虑到私营部门更多地参与种子和其他投入的采购和供应,甚至作为试点规模的活动。
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引用次数: 2
Rural development and transformation of the rice sector in Myanmar: Introduction of best management practices for sustainable rice agriculture 缅甸农村发展和稻米部门转型:介绍可持续稻米农业的最佳管理做法
IF 3 3区 经济学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2022-03-23 DOI: 10.1177/00307270221086008
Helena Wehmeyer, A. Malabayabas, Suzana San, Aung Myat Thu, Myat Su Tun, A. Thant, M. Connor
Myanmar has experienced considerable economic and social changes since its political transition in the early 2010s. Its agriculture sector has demonstrated rapid intensification and modernization. Agricultural best management practices (BMPs), e.g., drum seeders and laser land levelling, were introduced to rice farmers in Bago Region in 2012 to increase sustainable production and counter negative environmental impacts. The objective of this study was to determine the socioeconomic and agronomic changes due to the adoption of BMPs between adopters and non-adopters. Using a digital survey questionnaire application to collect household data, 200 farmers in eight villages were interviewed in 2012 and 2017. Data were analysed using uni- and multivariate statistics. Mediation analysis was utilized to evaluate the effect of the farmer group on rice yields. Overall, all farmers in this study experienced substantial positive changes over the course of five years in line with the national development efforts. Differences among adopters and non-adopters were not significant, but notable distinctions existed between cropping patterns. Rice-pulse farmers had higher yields ( + 0.4 t/ha), yet rice-rice farmers had larger cultivation areas, received higher agricultural credits, and had superior income levels. Nevertheless, rice yields remained low (<4 t/ha). Education was found to be an important predictor of yield. Hence, this factor is crucial for accelerating agricultural development in Myanmar. Improving extension services and knowledge transfer are necessary to expand the dissemination of sustainable BMPs and make farmers more resilient against the negative implications of climate change.
自2010年代初政治过渡以来,缅甸经历了相当大的经济和社会变革。其农业部门表现出快速的集约化和现代化。2012年,巴戈地区的稻农采用了农业最佳管理做法,如滚筒播种机和激光平整土地,以提高可持续生产并应对负面环境影响。本研究的目的是确定采用者和非采用者之间由于采用BMP而引起的社会经济和农艺变化。使用数字调查问卷应用程序收集家庭数据,在2012年和2017年对8个村庄的200名农民进行了采访。使用单因素和多因素统计分析数据。采用中介分析法评价农民群体对水稻产量的影响。总体而言,本研究中的所有农民在五年的时间里都经历了与国家发展努力相一致的重大积极变化。采用者和非采用者之间的差异并不显著,但种植模式之间存在显著差异。水稻种植户的产量更高( + 0.4 t/ha),但水稻种植户的种植面积更大,获得的农业信贷更高,收入水平更高。尽管如此,水稻产量仍然很低(<4 t/ha)。教育被发现是产量的重要预测因素。因此,这一因素对于加快缅甸农业发展至关重要。改善推广服务和知识转让对于扩大可持续BMP的传播和使农民更能抵御气候变化的负面影响是必要的。
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引用次数: 3
Technology, rurality and gender… false friends, but not enemies! 科技、乡村和性别……是虚假的朋友,而不是敌人!
IF 3 3区 经济学 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2022-03-16 DOI: 10.1177/00307270221086007
Hayet Kerras, Susana Bautista, María Dolores de-Miguel Gómez
Guaranteeing gender equality in the access and use of Information and Communication Technologies (ICT) has become today a determining element in the achievement of food security and as a consequence of the achievement of rural development, which constitutes one of the goals of the Food and Agriculture Organization of the United Nations (FAO). Indeed, the fight against digital gender gaps and other gaps in a general way allow a greater contribution in the agri-food sector, which is becoming increasingly digitized and technological. In fact, the objective of the study is to analyse the impact that have determined gaps, such as: force labour participation rate, literacy rate, pay rate and ICT study rate, on the participation rate gap in the agricultural sector. For this reason, a multiple linear regression is proposed that considers 64 countries and subsequently the situation of four of these countries is examined in more detail: France, Spain, Morocco and Algeria. The results of this show the existence of a positive correlation between our variables but also the effect that some socio-economic and cultural factors have on this achievement.
保障在获得和使用信息和通信技术方面的性别平等,已成为今天实现粮食安全的一个决定性因素,也是实现农村发展的结果,而农村发展是联合国粮食及农业组织(粮农组织)的目标之一。事实上,从总体上消除数字性别差距和其他差距,可以为农业食品部门做出更大贡献,因为农业食品部门正变得越来越数字化和技术化。事实上,这项研究的目的是分析确定差距的因素,例如:劳动力参与率、识字率、工资率和信息和通信技术研究率对农业部门参与率差距的影响。为此,提出了一种多元线性回归,考虑了64个国家,随后更详细地审查了其中四个国家的情况:法国、西班牙、摩洛哥和阿尔及利亚。研究结果表明,我们的变量之间存在正相关,但也表明了一些社会经济和文化因素对这一成就的影响。
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引用次数: 0
期刊
Outlook on Agriculture
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