农业机械化水平对农户主粮生产的影响

[目的]粮食问题关系国家安全、政治稳定和社会安定,是实施乡村振兴战略的首要任务。深入剖析新时期下农户粮食生产的影响因素,是保证国家粮食安全的现实要求。[方法]文章基于农户实地调研数据,运用工具变量法和样本选择修正模型分析农业机械化水平对农户主粮生产的影响。[结果](1)农业机械化水平对农户主粮生产有显著的正向影响,农业机械化水平每提高1%,农户主粮单产就提高1.219%,其中,水稻单产增加1.220 7%,小麦单产增加0.807 6%,玉米单产增加1.106 4%,马铃薯单产增加1.3798%。(2)从控制变量来看,户主受教育年限、户主务农经验、粮食补贴、农药化肥投入和平原地形都对不同主粮作物生产有积极作用,家庭外出务工占比、土地流转和气候极端变化都对不同主粮作物生产有消极作用。[结论]在农户不大幅调整当前主粮种植结构的前提下,适当增加马铃薯种植面积,提高种粮农户农业机械补贴力度,推广农机社会化作业服务模式,从而提高粮食产量,保障国家粮食安全。     

Agricultural land-use change during economic reforms in Ghana

Land-use change is driven by many interrelated factors including national policies formulated in response to the forces of globalization. This study integrates remote sensing data with social surveys to identify the role of demographic, technology and market-related variables in cropland expansion during economic reforms in Ghana. Macroeconomic changes increased the commercial orientation of farming as the sources of food supply changed from import to domestic production. However interest rates liberalization increased the use of labor at the expense of fertilizer and other complementary inputs. Demographic variables were more important in explaining cropland change after structural adjustment. Public agricultural support services are required for sustainable market-induced agricultural change in Ghana.     

Gendered impacts of fertilizer subsidy removal programs in Malawi and Cameroon

Gladwin's^** main contention is that women provide most of the agricultural labor in sub-Saharan Africa and because much of this labor is oriented to food production for home consumption, the effects of structural adjustment programs on them and the children they work to feed are likely to be different than on men who produce crops for commercial and export production. Her specific hypothesis for Malawi is that the removal of the fertilizer subsidy affects women farmers more than men farmers because it reduces fertilizer use on local maize. As part of the structural adjustment program, a major purpose of removing the fertilizer subsidy is to reallocate resources from food production for domestic consumption to cash crop production for export. In Gladwin's analysis, men farmers produce hybrid maize and tobacco for export and women produce the subsistence food crop, local maize. Gladwin's main contention is probably correct. For the Malawi case, the presentation does not support the hypothesis because two of the major underlying assumptions are inappropriate and the evidence provided is inconclusive. This comment proceeds by discussing the two assumptions and corresponding evidence. The purpose of this comment is not to contradict the hypothesis, but to clarify the Malawi situation and to suggest that a different analytical approach is needed in that context.     

Maize Diversity and the Political Economy of Agrarian Restructuring in Guatemala

The neoliberal restructuring of agriculture is often predicated on the promise of a more efficient food system: other objectives, such as access to food, the environmental sustainability of production practices, the nutritional composition of diets and the rights of food producers, are largely ignored. In this paper, I document how the liberalization of trade and agricultural policies in Guatemala has undermined the latter set of objectives, thereby compromising domestic food sovereignty and global food security. In particular, I demonstrate how neoliberal policies have undermined maize agriculture and contributed to the loss of crop genetic resources in the Guatemalan ‘megacentre’ of agricultural biodiversity. In its place, small‐scale farmers have been encouraged to conform to the country's purported comparative advantage in non‐traditional export crops. The results have been widening inequality, a growing dependence upon imported grain and agrochemicals, environmental degradation and decreased food security.     

Using participatory rural appraisal and participatory research and extension in a post-independence environment: a case from East Timor

A participatory rural appraisal (PRA) conducted in East Timor in 2004 as part of an agricultural development project provided the basis for a number of community-based participatory extension initiatives. The PRA involved several communities throughout a watershed and also served as a training exercise for local agriculture ministry staff. Despite the poverty of many of the communities involved, and in contrast to published literature on the local agricultural situation, farmers clearly expressed their need for more marketable crops and alternative sources of livelihoods. Their desires contrasted with the project's initial assumption that the major need was for increased production of staple crops to alleviate food scarcity. The project consequently branched out from concentrating on basic agronomy of staple crops into developing marketable crops, improving livestock production and facilitating development of a local business. Farmers' groups were set up to allow farmers to develop their own agricultural enterprises. Some ministry staff who participated in the project welcomed the opportunity to move from the traditional authoritarian extension system set up under Indonesian colonial rule to a more collegial and educational system. The breakdown of institutions and lines of authority following independence may create new opportunities for participatory development in newly independent states.     

Wheat Policy Options in Sub-Saharan Africa: The Case of Zimbabwe

Like many countries in sub-Saharan Africa, Zimbabwe is experiencing rapid growth in wheat consumption and imports. Policy makers in Zimbabwe and elsewhere must decide whether increased domestic wheat production might reduce dependency on imports and at the same time contribute to economic efficiency and food security goals. The domestic resource cost framework was used to assess Zimbabwe's comparative advantage among six major irrigated crops and to measure the effects of current government policies on producer incentives. The results indicate that irrigated wheat production represents an efficient use of Zimbabwe's resources during times of abundant rainfall, but the nation enjoys a comparative advantage in tobacco, maize, and cotton production during times of water scarcity. Existing agricultural policies provide disincentives for commercial farmers, because private profitability is less than social profitability for the major irrigated crops. However, this tax occurs across all commodities with similar incidence, so that the private incentives among crops are not greatly distorted from their social pattern. Sensitivity analysis confirms the robustness of these findings under a range of possible future economic and political developments. The domestic resource cost approach used in this study provides an operational method for measuring comparative advantage and should be of interest to policy analysts throughout sub-Saharan Africa.     

Modelling agricultural production of small-scale farmers in sub-Saharan Africa: A case study in western Kenya

Small-scale farmers are known to produce the greater proportion of food consumed in the Third World, especially in sub-Saharan Africa. The various national and international agricultural research centres located in these parts of the world have developed agricultural packages which have been proven, at experimental levels, to be highly productive. However, small-scale farmers in these areas continue to produce at levels far below the capacities of these packages as predicted from experimental results. Consequently, these farmers, despite their relatively large number, could not produce enough to feed themselves let alone the general population. To improve the quality of life of these farmers in particular, and the population of the Third World in general, there is a need to study the various factors responsible for low agricultural production at the household level. Models relating production to the various factors need to be formulated to improve our understanding of the functional relationships. This in turn could lead to relevant national and international policies with respect to small-scale farmers in the Third World. In this paper, we develop models to predict production given these factors. For simplicity, the parameters of the models are limited to land size (or herd size), environmental effect and management effect. A statistical examination of our model fitted to a set of survey data on this subject revealed that improving the farmers' management level could greatly enhance their production. Further statistical analysis of the data set showed that the various factors constituting the farmers' management level could broadly be classified into three groups: resources (labour and farm implements), personal characteristics (educational level and age) and external assistance (contact with extension agents/assistance) in that order of importance. We discuss the importance of these findings in the formulation of policies concerning small-scale farmers in sub-Saharan Africa.     

华北高产粮区基于环境保护的农产品安全生产服务体系现状及改进建议——以山东桓台县为例

我国正处在传统农业向现代农业转变的关键时期,迫切需要发展新型的农业生产服务体系,以期推进农业现代化的实现。文章通过对华北高产粮区-山东省淄博市桓台县的农业生产服务体系进行实地调研,从农户、合作社以及政府等不同角度,分析目前农业生产服务体系现状及其在解决当前日益严重的农业生态环境恶化和源头食品安全问题中所发挥的作用和存在的问题,其中主要包括农民对投入品意识淡薄,农资销售渠道繁杂、质量得不到保障、不能满足生产需求,相关农技培训的普及性、针对性、实效性明显不足,现有的农业生产服务体系与农民需求之间脱节等。提出了促进土地流转,改变小农户的经营模式,大力支持农业专业合作社的发展,通过合作社,加强政府的农业生产服务体系与农民生产需求之间的对接,实现环境保护与食品安全双赢的目标,为发展和完善当前的农业生产服务体系等政策提供指导性建议。     

黑龙江打造国家级现代农业示范基地的模式与途径

黑龙江作为中国第一耕地大省、第一商品粮基地和有机食品基地,农业的自然和基础优势应为黑龙江第一优势。在全球金融危机和对食品需求不断升级换代的大背景之下,黑龙江打造国家级现代农业示范基地具有在自然资源、组织资源、科技实力、生态环境和产业基础等方面的巨大优势,对于进一步加快由农业大省向农业强省转变,促进加快全国农业现代化进程,保障国家粮食安全,具有巨大潜力;对于构建黑龙江现代农业产业体系,促进农业增效和农民增收也都具有十分重要的意义。该文在分析黑龙江打造国家级现代农业示范基地的突出优势和巨大潜力的基础上,提出了相应的模式与途径。     

Cash cropping and food crop productivity: synergies or trade‐offs?

The case for promoting export‐oriented cash crops in Africa has generally been based on their direct potential contribution to agricultural productivity and small farmer incomes. A relatively neglected avenue of research concerns the synergistic effects that cash cropping can have on other household activities, including food production. The conventional view that cash crops compete with food crops for land and labour neglects the potential for cash crop schemes to make available inputs on credit, management training, and other resources that can contribute to food crop productivity, which might otherwise not be accessible to farmers if they did not participate in cash crop programs. This article builds on previous research by hypothesising key pathways by which cash crops may affect food crop activities and empirically measuring these effects using the case of cotton in Gokwe North District in Zimbabwe. Analysis is based on instrumental variable analysis of survey data on 430 rural households in 1996. Results indicate that—after controlling for household assets, education and locational differences—households engaging intensively in cotton production obtain higher grain yields than non‐cotton and marginal cotton producers. We also find evidence of regional spill‐over effects whereby commercialisation schemes induce second round investments in a particular area that provide benefits to all farmers in that region, regardless of whether they engage in that commercialisation scheme. The study suggests that the potential spill‐over benefits for food crops through participation in cash crop programs are important to consider in the development of strategies designed to intensify African food crop production.     

Potential of feed additives to improve the environmental impact of European livestock farming: a multi-issue analysis

Today, less than 3% of the 250,000 plant varieties available to agriculture are in use. Sources of (agricultural) biodiversity are under threat and disappearing in many regions. Increasing industrialisation of agriculture and top-down agricultural research have contributed to this dependence on a relatively few plant varieties. This article argues that new approaches to agricultural development research are needed to conserve agricultural diversity, improve crops, and produce food of quality for all. Such an approach should enable small farmers on marginal lands to participate as equal partners alongside agricultural scientists, fairly sharing their know-how, expertise and seeds. Three case studies illustrate how farmers and plant breeders are working together in a diversity of agro-ecological, socio-economic and political contexts to put these new approaches into practice. New forms of collaboration are producing an increase in diversity and a number of promising improved varieties in terms of yields, agronomic traits and taste. These varieties are showing better adaptation to the local environmental conditions without requiring extra external inputs. Long-term success requires that these efforts be backed up by supportive policies, by actions to ensure that policies are implemented, and where necessary by related legislation.     

Agricultural Marketing in France

French production is based on a large agricultural area with a large number of farmers. They work with co-operatives which are very near to them and collect their product. Protectionism has led to a disequilibrium with the economic system in this sector. Actual CAP's orientations and the increase in competition, has forced farmers and co-operatives to concentrate and restructure. The number of farmers has decreased while many co-operatives have started to process raw production materials. One goal of the food industry is to become more international. French food industry made a lot of acquisitions abroad but the increasing place of Italians in French companies also has to be noticed. Distribution plays an important role in agricultural marketing where 66% of food products are sold through about ten companies. This market structure allows them to have a favored position. However, it's a very dynamic sector which now faces some difficulties.     

陕西省主要粮食作物生产成本收益研究——以小麦、玉米为例

陕西省是我国的农业大省,粮食作物的生产成本和收益与农民收入直接相关,对农村经济的可持续发展具有重要影响。文章分析了陕西省主要粮食作物的种植现状,以小麦、玉米为例探究了主要粮食作物的生产成本收益,并对生产中存在的问题及潜力进行了详细分析,结果表明,尽管实施了多项惠农政策,粮食作物生产仍表现为成本高,收益低,农民播种积极性不高;粮食生产面临形势严峻,但陕西省粮食生产有很大的潜力可以挖掘。该文还提出了提高农民耕种积极性、提高粮食作物单产水平、实现农业产业化等对策建议,以期为提高粮食作物产量和品质,提高生产成本收益提供一定依据。     

基于化肥减量化管理的农业清洁生产多方联动机制框架研究

[目的]化肥减量增效是实现农业可持续发展的关键举措和优先任务,文章首先基于环境经济学的外部性理论分析与国内外研究现状综述,提出了新形势下基于利益相关方的视角开展化肥减量化管理多方联动机制研究的必要性。[方法]为构建有效的多方联动机制,需要全面了解利益相关方参与化肥减量化管理的现状与主要问题,该文实地调研了普通农户、新型经营主体的耕地保护意识、地力改善意识、清洁生产支付意愿和对政府的主要利益诉求并对其做了对比分析,同时通过关键人物访谈了解基层农技部门、有机肥生产企业在化肥减量过程中面临的主要困难。[结果]构建了化肥减量化管理多方联动机制框架,具体包括肥料生产与使用监管机制、耕地保护责任追究机制、化肥减量化技术推广机制、农业清洁生产补贴机制和绿色农产品消费引导机制等。[结论]结合当前农业供给侧结构性改革的政策背景,强调通过综合运用规范性、激励性和市场性政策工具和手段,建立有效的化肥减量化管理多方联动机制是实现化肥减量增效和农业可持续发展的必然要求。此外,该文补充强调了当前化肥减量应坚持用地、养地相结合,化肥、有机肥配合使用,在保持和改善当前地力水平的前提下,通过提质增效来确保粮食安全、农民增收。     

Food crops, exports, and the short-run policy response of agriculture in Africa

The response of agriculture to changes in relative prices is an important factor in the success of structural adjustment programs in Africa. In this paper I estimate supply functions for total agricultural output, food crops and export crops in 14 African countries for the years 1975 to 1990. Food and export crops are substitutes in production in the short run. Total agricultural output responds negatively to increases in export prices and positively to increases in food prices. A plausible explanation is that as farmers shift resources to export crop production, food supply falls in the short run, while the increase in export supply may take several years to materialize. The exchange rate is significant in explaining both food and export crop production and aggregate agricultural supply, suggesting that the exchange rate is acting as a proxy for excluded macroeconomic variables or that changes in the exchange rate are not passed immediately through to prices.     

Land use consolidation in Rwanda: The experiences of small-scale farmers in Musanze District,Northern Province

The modernization and intensification of agricultural production in Africa has long been a policy goal, for increased productivity and food security. In 2008, the Rwandan government implemented various land and agricultural reforms to transform Rwandan agriculture from subsistence farming to market-oriented production. Central to this agricultural transformation was the Crop Intensification Programme, intended to increase the agricultural productivity of high-potential food crops and encourage land use consolidation, i.e., the joint cultivation of large areas, which was expected to deliver important economies of scale. This programme has been criticized, for example, for authoritarian implementation, negative effects on food security from sole-cropping a few selected crops, and increasing rural socioeconomic differentiation.This paper analyses the effects of the land use consolidation programme at the household level, as experienced by small-scale farmers in Musanze District in the Northern Province of Rwanda. The paper draws on 45 individual and 22 collective qualitative semi-structured interviews with small-scale farmers and local key informants in five sectors, conducted in 2013 and 2014.The findings show that there is satisfaction, dissatisfaction, and resistance to the programme, especially regarding the selected crops to be cultivated. The programme, including supporting mechanisms, seems to work well for the relatively better-off farmers, who have bigger and scattered land areas, whereas it does not work well for poor farmers with very small plots, which is common in rural Rwanda.     

Development of agriculture in Ethiopia since the 1975 land reform

A stated objective of the Ethiopian Government since it came to power in 1975 has been to increase the production of crops for both domestic consumption and export. Consequently, a number of plans and programs have been proposed and implemented to bring about such development in Ethiopian agriculture. This paper mainly focuses 011 a macro review of the general course of Ethiopian agricultural development since the land reform of 1975. The food production in Ethiopia has lagged behind the population growth as evidenced by the gap between the growth rates of population (3%) and food production (1.8%) over the period from 1970 to 1983. Recently, this situation has, perhaps, further deteriorated. Seventy-one percent of the total land mass is estimated to be suitable for agriculture, but only about 19% is cultivated. This suggests an underutilisation of land. Moreover, Ethiopia has a persistent subsistence production problem in agriculture. Agricultural research and education which are essential to development have not been given due attention by the policy makers. As a result, the agricultural technologies used by farmers have changed little in this century. Moreover, small-scale farmers, although still the most potent economic force in the country, have not been given the incentives necessary to expand production, and currently receive less than adequate support from the central government. Some 85%, 50%, and 79% of total agricultural credit, fertiliser and improved seeds respectively go directly to socialist enterprises (state farms and producers' cooperatives) which, up to 1985, have jointly accounted for only 5% of the total cultivated land and 4% of the national crop production. The favouring of large-scale and capital-intensive state-owned farming enterprises with credit, subsidies, and fiscal incentives, while neglecting smallholders, has contributed to the stagnation of agricultural production in Ethiopia. Overall, the analysis indicates that there has been no significant development of agriculture in Ethiopia following the 1975 land reform.     

Climate Change,Crop Selection and Agricultural Revenue in Ghana: A Structural Ricardian Analysis

We apply a Structural Ricardian Model (SRM) to farm‐level data from Ghana for seven principal food crops in order to model the factors which influence farmers' decisions about which food crops to grow and the revenue conditional on these choices. Our application of the SRM incorporates a flexible functional form to allow for the possibility that the effects of temperature and rainfall may not be linearly separable. We use this model as a basis for simulations of the effects of climate change. These simulations suggest that extreme climate change will lead to a significant reduction in the average net revenue per hectare from maize, which accounts for over half of current food production. Across a range of climate change scenarios, there is also substantial substitution of maize for heat‐tolerant millet, and a reduction in the cultivation of other crops. Under most of the climate change scenarios that we consider, these results imply a substantial reduction in the aggregate value of agricultural production, since millet is the lowest‐value crop.     

New Paths to Capitalist Agricultural Production in Africa: Experiences of Ghanaian Pineapple Producer–Exporters

With the global restructuring of agri‐food markets since the 1980s, an impressive amount of scholarship has examined its impacts in African countries. However, little has been written on the emergence of local medium and large‐scale commercial farmers selling to export companies or controlling their own export marketing arrangements. This article examines Ghanaian commercial farmers producing and exporting fresh pineapples to European markets. This group of pineapple producer–exporters represents a path to capitalist agricultural production that can be conceptualized as capitalism from outside: where capital flows into the countryside, rather than accumulation occurring from above or below within the agrarian economy. The emergence of this form of agrarian capitalism is stimulated by opportunities in new high‐value agricultural export markets, but its stabilization depends on country‐specific characteristics such as rural social structures, property rights and state support. The article documents the conditions of emergence of this new group of Ghanaian capitalist farmers, the period of destabilization caused by increasing international competition that resulted in a small number of large‐scale agribusiness firms surviving, and the challenges that these agribusiness firms faced in stabilizing their capitalist agricultural production.     

Perceptions and outlook on intercropping coffee with banana as an opportunity for smallholder coffee farmers in Uganda

Coffee and banana are important cash and food crops in Uganda and the surrounding East African highland region. Production is dominated by smallholders that have limited arable land and often coffee and banana are intercropped. No significant research and development efforts have been undertaken over the last few decades on this coffee/banana intercropping system. Because recent studies suggest that this system could be a practice with high benefits to the farmers, we decided to study the perceptions of stakeholders along the coffee value chain starting with farmers. Perception analysis based on open-ended interviews following interview guides revealed that a major limitation for the sustainability of this system was poor soil fertility conditions. Perceptions on the benefits of intercropping differed little among coffee actors; that is, banana intercropping provides additional food and income from smallholders’ limited land and helps farmers reduce risks related to drought, pest/disease attacks and coffee price volatility. However, farmers’ desire to minimize risks does not match the objective of stakeholders higher up the coffee value chain to maximize coffee production. Furthermore, research by public institutes, both national and international, is primarily organized for single crops and not systems. We conclude that the institutional setting of the coffee sector hampers the promotion of intercropping, despite the benefits for the farmer.