Enhancing climate resilience using stress-tolerant maize in conservation agriculture in southern Africa.

2022 ◽  
pp. 230-245
Author(s):  
Peter Setimela ◽  
Isaiah Nyagumbo ◽  
Walter Mupangwa ◽  
Munyaradzi Mutenje
Keyword(s):  
Southern Africa ◽  
Smallholder Farmers ◽  
Conservation Agriculture ◽  
Growing Season ◽  
Economic Benefits ◽  
Maize Germplasm ◽  
Maize Cultivars ◽  
Climate Resilience ◽  
Drought Tolerant ◽  
Smart Agriculture

Abstract Recurrent and widespread droughts in southern Africa (SA) reduce agricultural productivity and increase food insecurity among smallholder farmers. The average growing-season temperatures are expected to increase by 2.5°C. In SA maize is a staple food, accounting for more than 30% of total calories. The crop is mostly grown by smallholder farmers with limited inputs of fertilizers and improved seed. Most of the maize cultivars grown by farmers are susceptible to heat and drought. Multi-stress-tolerant maize germplasm is one of the climate smart agriculture (CSA) components and, when used in combination with others, can sustainably increase production and resilience of agricultural systems. In this paper we review the performance and economic benefits of drought-tolerant maize cultivars under conventional monocropping practice, under conventional intercropping and in Conservation Agriculture (CA) as part of sustainable intensification to ensure food security for smallholder farmers.

scholarly journals Conservation agriculture and drought-tolerant germplasm: Reaping the benefits of climate-smart agriculture technologies in central Mozambique

2015 ◽  
Vol 31 (5) ◽  
pp. 414-428 ◽  
Author(s):  
Christian Thierfelder ◽  
Leonard Rusinamhodzi ◽  
Peter Setimela ◽  
Forbes Walker ◽  
Neal S. Eash
Keyword(s):  
Cropping Systems ◽  
Direct Interaction ◽  
Conservation Agriculture ◽  
Conventional Tillage ◽  
Soil Disturbance ◽  
Drought Tolerant ◽  
Maize Varieties ◽  
Tillage Treatment ◽  
Smart Agriculture

AbstractConservation agriculture (CA) based on minimum soil disturbance, crop residue retention and crop rotations is considered as a soil and crop management system that could potentially increase soil quality and mitigate the negative effects of climate variability. When CA is combined with drought-tolerant (DT) maize varieties, farmers can reap the benefits of both—genetic improvement and sustainable land management. New initiatives were started in 2007 in Mozambique to test the two climate-smart agriculture technologies on farmers' fields. Long-term trends showed that direct seeded manual CA treatments outyielded conventional tillage treatments in up to 89% of cases on maize and in 90% of cases on legume in direct yield comparisons. Improved DT maize varieties outyielded the traditional control variety by 26–46% (695–1422 kg ha−1) on different tillage treatment, across sites and season. However a direct interaction between tillage treatment and variety performance could not be established. Maize and legume grain yields on CA plots in this long-term dataset did not increase with increased years of practice due to on-site variability between farmer replicates. It was evident from the farmers' choice that, beside taste and good milling quality, farmers in drought-prone environments considered the potential of a variety to mature faster more important than larger potential yields of long season varieties. Population growth, labor shortage to clear new land areas and limited land resources in future will force farmers to change toward more permanent and sustainable cropping systems and CA is a viable option to improve their food security and livelihoods.

Increasing adaptation to climate stress by applying conservation agriculture in Southern Africa.

2022 ◽  
pp. 270-283
Author(s):  
Christian Thierfelder ◽  
Peter Steward
Keyword(s):  
Climate Change ◽  
Soil Moisture ◽  
Heat Stress ◽  
Drought Stress ◽  
Southern Africa ◽  
Smallholder Farmers ◽  
Conservation Agriculture ◽  
Crop Productivity ◽  
Soil Disturbance ◽  
On Farm

Abstract 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.

scholarly journals Climate Smart Agriculture and Its Implementation Challenges in Africa

2019 ◽  
pp. 1-13
Author(s):  
Behailu Legesse Kaptymer ◽  
Jemal Abdulkerim Ute ◽  
Musa Negeso Hule
Keyword(s):  
Climate Change ◽  
Risk Sharing ◽  
Smallholder Farmers ◽  
Rural Livelihoods ◽  
Conservation Agriculture ◽  
Social Infrastructure ◽  
Resource Base ◽  
Implementation Challenges ◽  
Pests And Diseases ◽  
Smart Agriculture

The changing climate is hitting smallholder farmers hard. It is doing so especial in the African continent which is regularly pronounced as most vulnerable to the impacts of climate change.  Climate change brings droughts and floods, pests and diseases; it means poorer crops, less food, and lower incomes. Agriculture in Africa must undergo a major transformation in the coming decades in order to meet the intertwined challenges of achieving food security, reducing poverty and responding to climate change without depletion of the natural resource base. Climate-smart agriculture seeks to increase productivity in an environmentally and socially sustainable way, strengthen farmers’ resilience to climate change, and reduce agriculture’s contri­bution to climate change by reducing greenhouse gas emissions and increasing carbon storage on farmland. Climate-smart agriculture includes practical techniques including mulch­ing, conservation agriculture, integrated crop-livestock management, crop rotation, intercropping, agro forestry, improved grazing, and improved of water management system. In spite of the potential of Climate Smart Agriculture to improve resilience and to enhance agricultural production and rural livelihoods, systematic response to climate change through adoption of Climate Smart Agriculture practices and technologies is still very limited in Africa for a host of reasons. some of the challenges facing Climate-smart agriculture in Africa includes, Lack of practical understanding of the approach; Lack of data and information and appropriate analytical tools at local and national levels; Inadequate coordinated, supportive and enabling policy frameworks; Lack of adequate and innovative financing mechanisms and effective risk-sharing schemes; Limited credit and finance and Poor physical and social infrastructure to mention few.  To support the implementation of climate-smart agriculture and resolve the challenges in Africa, it is necessary to improve the coordination of policies and strengthen local, national and regional institutions.

Conservation agriculture innovation systems build climate resilience for smallholder farmers in South Africa.

2022 ◽  
pp. 345-360
Author(s):  
Erna Kruger ◽  
Hendrik Smith ◽  
Phumzile Ngcobo ◽  
Mazwi Dlamini ◽  
Temakholo Mathebula
Keyword(s):  
South Africa ◽  
Value Chain ◽  
Smallholder Farmers ◽  
Innovation System ◽  
Conservation Agriculture ◽  
Soil Disturbance ◽  
Smallholder Farming ◽  
Learning Groups ◽  
Successful Model ◽  
Smart Agriculture

Abstract 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).

Productivity and profitability of manual and mechanized conservation agriculture (CA) systems in Eastern Zambia

2017 ◽  
Vol 34 (5) ◽  
pp. 380-394 ◽  
Author(s):  
W. Mupangwa ◽  
M. Mutenje ◽  
C. Thierfelder ◽  
M. Mwila ◽  
H. Malumo ◽  
...  
Keyword(s):  
Smallholder Farmers ◽  
Cropping Systems ◽  
Block Design ◽  
Conservation Agriculture ◽  
Maize Yield ◽  
Conventional Tillage ◽  
Economic Benefits ◽  
Direct Seeding ◽  
Net Return ◽  
Conventional Practice

AbstractClimate variability and declining soil fertility pose a major threat to sustainable agronomic and economic growth in Zambia. The objective of this study was to assess crop yield, land and labor productivity of conservation agriculture (CA) technologies in Eastern Zambia. On-farm trials were run from 2012–2015 and farmers were replicates of a randomized complete block design. The trials compared three CA systems against a conventional practice. Yield and net return ha−1 were determined for maize and legume yield (kg ha−1) produced by ridge and furrow tillage, CA dibble stick planting, CA animal traction ripping and direct seeding. The dibble stick, ripline and direct seeding CA systems had 6–18, 12–28 and 8–9% greater maize yield relative to the conventional tillage system, respectively. Rotation of maize with cowpea and soybean significantly increased maize yields in all CA systems. Intercropping maize with cowpea increased land productivity (e.g., the land equivalent ratio for four seasons was 2.01) compared with full rotations under CA. Maize/cowpea intercropping in dibble stick CA produced the greatest net returns (US$312-767 ha−1) compared with dibble stick maize-cowpea rotation (US$204-657), dibble stick maize monoculture (US$108-584) and the conventional practice (US$64-516). The net-return for the animal traction CA systems showed that maize-soybean rotations using the ripper were more profitable than the direct seeder or conventional ridge and furrow systems. Agronomic and economic benefits of CA-based cropping systems highlight the good potential for improved food security and agricultural productivity for smallholder farmers.

scholarly journals Exploring Smallholder Farmers’ Preferences for Climate-Smart Seed Innovations: Empirical Evidence from Southern Ethiopia

2021 ◽  
Vol 13 (5) ◽  
pp. 2786
Author(s):  
Shimelis Araya Geda ◽  
Rainer Kühl
Keyword(s):  
Smallholder Farmers ◽  
Preference Heterogeneity ◽  
Southern Ethiopia ◽  
Significant Preference ◽  
Experiment Data ◽  
Breeding Programs ◽  
Drought Tolerant ◽  
The Face ◽  
Mnl Model ◽  
Participatory Research Methods

Rapid plant breeding is essential to overcome low productivity problems in the face of climatic challenges. Despite considerable efforts to improve breeding practices in Ethiopia, increasing varietal release does not necessarily imply that farmers have access to innovative varietal choices. Prior research did not adequately address whether varietal attributes are compatible with farmers’ preferences in harsh environmental conditions. With an agricultural policy mainly aiming to achieve productivity maximization, existing breeding programs prioritize varietal development based on yield superiority. Against this background, we estimated a multinomial logit (MNL) model based on choice-experiment data from 167 bean growers in southern Ethiopia to explore whether farmers’ attribute preferences significantly diverge from those of breeders’ priorities. Four important bean attributes identified through participatory research methods were used. The results demonstrate that farmers have a higher propensity toward drought-tolerant capability than any of the attributes considered. The model estimates further show the existence of significant preference heterogeneity across farmers. These findings provide important insight to design breeding profiles compatible with specific producer segments. We suggest demand-driven breeding innovations and dissemination strategies in order to accelerate the adoption of climate-smart and higher-yielding bean innovations that contribute to achieve the national and global sustainability goals in Ethiopia.

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