Conservation agriculture in Africa: climate smart agricultural development最新文献

{"title":"Conservation agriculture innovation systems build climate resilience for smallholder farmers in South Africa.","authors":"E. Kruger, Hendrik J. Smith, Phumzile Ngcobo, Mazwi Dlamini, Temakholo Mathebula","doi":"10.1079/9781789245745.0021","DOIUrl":"https://doi.org/10.1079/9781789245745.0021","url":null,"abstract":"Abstract\u0000 Introduction of Conservation Agriculture (CA) and associated climate-resilient agriculture practices within an innovation system approach, and using farmer-level experimentation and learning groups as the primary learning and social empowerment processes, has created a sustainable and expanding farming alternative for smallholders that is improving their resilience to climate change substantially. Through a knowledge co-creation process, smallholder farmers in the programme have adapted and incorporated a wide range of practices into their farming system, including minimum soil disturbance, close spacing, improved varieties, judicious use of fertilizer, pesticides and herbicides, crop diversification, intercropping and crop rotation as well as fodder production and livestock integration. They have organized themselves into learning groups, local savings and loan associations, water committees, farmer centres and cooperatives and in so doing have created innovation platforms for local value chain development. They have built ongoing relationships with other smallholders, NGOs, academic institutions, government extension services and agribusiness suppliers, and have promoted CA tirelessly within their local communities and social networks. To date, this is the most successful model for implementation of CA in smallholder farming in South Africa and, through networking and upscaling activities, is being promoted nationally as a strategic approach to smallholder adaptation and mitigation programming, in line with the Africa climate smart agriculture (CSA) Vision 25×25 (NEPAD, Malabo, June 2014).","PeriodicalId":113586,"journal":{"name":"Conservation agriculture in Africa: climate smart agricultural development","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128238055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Conservation agriculture in the southern highlands of Tanzania: learnings from two decades of research for development.","authors":"R. Shetto, S. Mkomwa, N. Mlengera, R. Mwakimbwala","doi":"10.1079/9781789245745.0006","DOIUrl":"https://doi.org/10.1079/9781789245745.0006","url":null,"abstract":"Abstract\u0000 Since its introduction into the Southern Highlands of Tanzania by researchers 25 years ago, Conservation Agriculture (CA) has been well received, researched and the concept proven to be increasing productivity and incomes, enhancing resilience of livelihoods and contributing to reducing greenhouse gas emissions. CA research, as defined by the three interlined principles, was introduced into the Southern Highlands by the Tanzania Agricultural Research Institute (TARI) Uyole, formerly Agricultural Research Institute (ARI) Uyole around 1995. Research results showed a labour saving of up to 70% in CA compared to conventional tillage, yield increases of 26%-100% and 360% for maize and sunflower, respectively, partly attributed to higher moisture content (18%-24%) in CA systems. CA was also found to be much more effective in mitigating dry spells and increasing productivity in maize production in areas where average annual rainfall is less than 770 mm. Economic analysis of maize production showed that profits in CA were three times more than in conventional tillage production at US$526.9 ha-1 and US$ 176.6 ha-1, respectively. Profits were twice as much for beans under CA at US$917.4 ha-1 compared to US$376.3 ha-1 for conventional practice. Studies confirm that 5% of farmers in the Southern Highlands have adopted CA. Increased uptake requires addressing challenges including resistance to change in mindset, inaccessibility of appropriate mechanization and cover crop seeds, traditions of free-range communal grazing of livestock (which makes it difficult for farmers to retain crop residue in their farms) and shortage of investment capital. A holistic value chain approach is recommended in CA interventions, bringing together various stakeholders including scientists, trainers, extension workers, administrators, policy makers, agro-inputs and machinery dealers, machinery service providers, agro-processors and financial institutions. The innovations adaptation set-up brings service providers closer to farmers for co-innovation. Long-term CA programmes are recommended, with farmers being taken through the complete learning cycle in testing CA technologies under their own farm environments. This should be complemented by entrepreneurial CA machinery hire services provision to increase the availability of farm power to smallholders unlikely to have the capital or skills to buy and manage their own machinery. The proof of application of the CA concept in the Southern Highlands has set the stage for further scaling the adoption of CA through support from national policies and programmes.","PeriodicalId":113586,"journal":{"name":"Conservation agriculture in Africa: climate smart agricultural development","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127919289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Moving paradigms - conservation agriculture with alternative agronomics to minimize inputs.","authors":"T. Goddard, A. Kassam, S. Mkomwa","doi":"10.1079/9781789245745.0010","DOIUrl":"https://doi.org/10.1079/9781789245745.0010","url":null,"abstract":"Abstract\u0000 The African Union Malabo Declaration outlines goals to achieve sustainable production practices for economic growth in the agriculture sector by 2025. Conservation Agriculture (CA) practices represent a climate smart and resource friendly sustainable production system, and these need to be adopted and refined. This will be a paradigm shift for academics, experts and farmers who are embedded in the intensive external-input monoculture tillage systems. From our review of literature, recent history has shown that CA systems are successful and profitable while using less external inputs and expending less energy. Energy use can be reduced by 40% and labour needs by 50%-90%. Research has shown that CA farming is superior in terms of enhancing soil functions, biodiversity, beneficial insects, energy consumption, greenhouse gas (GHG) emissions and resilience to extreme climate events. Nitrogen and other essential elemental crop needs can be reduced by 10%-70% through CA systems. African research and farm testing have shown integrated CA cropping systems can control insect and weed pests while providing more diverse economic crops. For the paradigm shift to occur quickly, efficiently and economically, institutions need to lead change. Policy makers need to start strategic changes to research and institutions by initiating support programmes identified by innovative researchers and agricultural leaders that can move the Malabo dial towards the 2025 goals.","PeriodicalId":113586,"journal":{"name":"Conservation agriculture in Africa: climate smart agricultural development","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130656761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Strengthening conservation agriculture education in Africa.","authors":"Caryl Clark, A. Kassam, S. Mkomwa, P. Kuria, W. Mutai","doi":"10.1079/9781789245745.0020","DOIUrl":"https://doi.org/10.1079/9781789245745.0020","url":null,"abstract":"Abstract\u0000 This chapter brings together recent developments and ongoing efforts in Conservation Agriculture (CA) education in Africa. It covers areas related to online education and training including CA Massive Open Online Courses (MOOCs), CA-based education and training capacity, CA curriculum development and CA quality assurance. An overview of emerging opportunities in CA education and training are elaborated in general, as well as through specific efforts of institutions such as the African Conservation Tillage Network. CA-based land use transformation occurring in Africa, and the growth of related supporting activities in public and private sectors, represent an important area of opportunity for education and training. It also offers opportunity for youth to develop their vocational and professional careers in the food and agriculture sector.","PeriodicalId":113586,"journal":{"name":"Conservation agriculture in Africa: climate smart agricultural development","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130820029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Increasing adaptation to climate stress by applying conservation agriculture in Southern Africa.","authors":"C. Thierfelder, P. Steward","doi":"10.1079/9781789245745.0016","DOIUrl":"https://doi.org/10.1079/9781789245745.0016","url":null,"abstract":"Abstract\u0000 Climate change and soil fertility decline are threatening food security in southern Africa and efforts have been made to adapt current cropping systems to the needs of smallholder farmers. Conservation Agriculture (CA) based on minimum soil disturbance, crop residue retention and crop diversification has been proposed as a strategy to address the challenges smallholder farmers face. Here we analyse the potential contributions of CA towards adaptation to the effects of climate change by summarizing data on infiltration, soil moisture dynamics and crop productivity under heat and drought stress. The data were taken in the main from CIMMYT's on-farm and on-station trial network. Data show that CA systems maintain 0.7-7.9 times higher water infiltration than the conventional tilled system depending on soil type, which increases soil moisture during the cropping season by 11%-31% between CA treatments and the conventional control treatment. This leads to greater adaptive capacity of CA systems during in-season dry spells and under heat stress. A supporting regional maize productivity assessment, analysing the results of numerous on-farm and on-station experiments, showed that CA systems will outperform conventional tillage practices (CP), especially on light-textured soils, under heat and drought stress. With higher rainfall and low heat stress, this relation was more positive towards CP and on clay soil there was no benefit of practising CA when rainfall was high. The long dry season and limited biomass production of CA systems in southern Africa require complementary good agricultural practices to increase other soil quality parameters (e.g. increased soil carbon) to maintain higher productivity and sustainability over time. This can be addressed by combinations of improved stress-tolerant seed, targeted fertilization, inclusion of tree-based components or green manure cover crops in the farming system, scale-appropriate mechanization and improved weed control strategies.","PeriodicalId":113586,"journal":{"name":"Conservation agriculture in Africa: climate smart agricultural development","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132410573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Conservation agriculture for smallholder farmers in rainfed and irrigated systems in the eastern Indo-Gangetic Plain: lessons learned.","authors":"M. E. Haque, R. Bell, M. Jahiruddin","doi":"10.1079/9781789245745.0028","DOIUrl":"https://doi.org/10.1079/9781789245745.0028","url":null,"abstract":"Abstract\u0000 Conservation Agriculture (CA), which delivers multiple benefits for crop cultivation, is becoming increasingly popular worldwide. However, CA is not a single, ready-made or simple technology that can be adopted everywhere without necessary farm-level refinement. The CA practitioners may need to incorporate changes in practices and each needs a few years of experience to fully learn how to optimize the technology on a particular crop on each farm. Implementation of CA is challenging in resource-limited, intensively cropped and rice-based smallholder farms. This chapter is a reflection on lessons learned during the last two decades of research, farmers' adoption and service providers' (LSP) feedback on CA practice in rainfed and irrigated systems where farmers grow three crops per year including at least one transplanted rice crop. The researchers review smallholder farmers and LSP affordable and preferred CA planters, and the performance of CA in crop establishment and management, weed management, role and involvement of farmers' groups, farm level benefits, rice and upland crops. Case studies are also presented on the benefits of CA practice including resources optimization, long-term trends of crop yield and profit margin, soil organic carbon sequestration and greenhouse gas (GHG) implications. These lessons may be useful for new practitioners, extensionists, researchers, teachers, students and policy planners to implement CA in smallholder regions considering food security, soil health and livelihoods and their contribution to mitigation of global warming.","PeriodicalId":113586,"journal":{"name":"Conservation agriculture in Africa: climate smart agricultural development","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126017787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On-farm experimentation for scaling-out conservation agriculture using an innovation systems approach in the north west province, South Africa.","authors":"Hendrik J. Smith, Gerhardus Trytsman, A. Nel","doi":"10.1079/9781789245745.0026","DOIUrl":"https://doi.org/10.1079/9781789245745.0026","url":null,"abstract":"Abstract\u0000 A project under the Farmer Innovation Programme (FIP) that aimed to adapt Conservation Agriculture (CA) among grain farmers in South Africa was implemented in a commercial farming area of the North West Province. The following on-farm, collaborative-managed trials produced key findings concerning: (i) plant population densities (high versus low) under CA; (ii) conventional crop systems versus CA crop systems; (iii) the testing and screening of cover crops; (iv) green fallow systems for soil restoration; and (v) livestock integration. Key results from these trials were that the yield of maize was significantly higher under high-density no-till (NT) systems compared to the normal NT systems. The yield of maize in local conventional systems was lower than the yield in NT systems tested on three farmer-managed trials. The screening trial assisted in testing and learning the suitability and the different attributes of a range of cover crops in that area. Cover crop mixtures used as a green fallow system with livestock showed that CA can facilitate the successful restoration of degraded soil.","PeriodicalId":113586,"journal":{"name":"Conservation agriculture in Africa: climate smart agricultural development","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132339224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of conservation agriculture on soil health: lessons from the university of fort hare trial.","authors":"L. Muzangwa, I. Gura, Sixolise Mcinga, P. Mnkeni, C. Chiduza","doi":"10.1079/9781789245745.0018","DOIUrl":"https://doi.org/10.1079/9781789245745.0018","url":null,"abstract":"Abstract\u0000 Conservation Agriculture (CA) promotes soil health, but issues to do with soil health are poorly researched in the Eastern Cape, South Africa. This study reports on findings from a field trial done on the effects of tillage, crop rotations composed of maize (Zea mays L.), wheat (Triticum aestivum L.) and soybean (Glycine max L.) and residue management on a number of soil health parameters such as carbon (C)-sequestration, CO2 fluxes, enzyme activities, earthworm biomass and the Soil Management Assessment Framework soil quality index (SMAF-SQI). The field trial was done in a semi-arid region of the Eastern Cape Province, South Africa, over five cropping seasons (2012-2015). It was laid out as a split-split plot with tillage [conventional tillage (CT) and no-till (NT)] as main plot treatment. Sub-treatments were crop rotations: maize-fallow-maize (MFM), maize-fallow-soybean (MFS); maize-wheat-maize (MWM) and maize-wheat-soybean (MWS). Residue management: removal (R-) and retention (R+) were in the sub-sub-plots. Particulate organic matter (POM), soil organic carbon (SOC), microbial biomass carbon (MBC) and enzyme activities were significantly (p < 0.05) improved by residue retention and legume rotation compared to residue removal and cereal-only rotations. Also, carbon dioxide (CO2) fluxes under CT were higher compared to NT. The calculated soil quality index (SQI) was greatly improved by NT and residue retention. MWM and MWS rotations, in conjunction with residue retention under NT, offered the greatest potential for building soil health. Residue retention and inclusion of soybean in crop rotations are recommended for improving soil health under CA systems in the semi-arid regions of South Africa.","PeriodicalId":113586,"journal":{"name":"Conservation agriculture in Africa: climate smart agricultural development","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127084767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Formal education and training for conservation agriculture in Africa.","authors":"S. Mkomwa, H. Mloza-Banda, W. Mutai","doi":"10.1079/9781789245745.0019","DOIUrl":"https://doi.org/10.1079/9781789245745.0019","url":null,"abstract":"Abstract\u0000 This chapter examines the role of formal education, training and skills development in Conservation Agriculture (CA) in Sub-Saharan Africa (SSA) in the context of the region's agricultural transformation systems. It explores nascent literature on potential reforms that include development of CA educational programmes and linkages that are more strategically attuned to national agriculture development aspirations. The chapter highlights theoretical grounds and practical examples for the multi-level strategies with complementary relationships aimed at facilitating systemic CA-related education, training and skills development to accelerate and expand its uptake in Africa. The chapter has advocated educational institutions and the university in particular to orchestrate the CA innovation value chain through 'internal' alignment of actors at institutional level (i.e. intra-organizational mainstreaming). The success of an innovation also depends on its 'external' viability. This was illustrated by proposing inter-organizational mainstreaming and a triple helix model where government and industry, respectively, are the principal actors towards increase in sociotechnical viability of the CA innovation system. There are obvious hurdles related to the interactions and coordination between stakeholders, as well as the integration of value complementarities across the value chain. Probable corrective strategies have been exhaustively interrogated and they are, for instance, manifested through technical and organizational adaptations as they summarize and compare systematically their contributions, arguments, assumptions and limitations in the process of creating and harnessing economies of scope in innovation. There may not be any ideal model for demand-led, CA-related education, training and skills development. A number of strategic options present themselves and, in a dynamic world, all strategies are relatively short-lived but must yield outcomes that contribute to longer-term goals. The educational institutions should find appropriate themes and avenues worthy of support in their own right, and projects that invite collaboration on their own terms.","PeriodicalId":113586,"journal":{"name":"Conservation agriculture in Africa: climate smart agricultural development","volume":"52 Pt 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128956412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mainstreaming of the conservation agriculture paradigm in Africa.","authors":"A. Kassam, S. Mkomwa","doi":"10.1079/9781789245745.0004","DOIUrl":"https://doi.org/10.1079/9781789245745.0004","url":null,"abstract":"Abstract\u0000 This chapter provides a justification for mainstreaming Conservation Agriculture (CA) in Africa. It describes the rationale for total transformation of agriculture that is needed in the future. Mainstreaming CA requires not only nation-wide adoption of the new paradigm of agriculture but also the necessary policy and institutional alignment to ensure that CA maintains its quality and full range of benefits to the farmers and to society. CA is a core component of climate smart agriculture and has been endorsed by the Malabo Declaration and Agenda 2063 for agricultural development. Thus, it is essential that everything possible is done by all stakeholders to support the implementation of Agenda 2063 with CA at its core. The chapter elaborates five major areas of change that are necessary to create the appropriate conditions for mainstreaming CA in Africa.","PeriodicalId":113586,"journal":{"name":"Conservation agriculture in Africa: climate smart agricultural development","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127866891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}