Smallholder Irrigation Schemes Research Articles

The Impact of Smallholder Irrigation Scheme on Household Welfare in Farm-Managed Irrigation Scheme Communities in the Eastern Cape Province, South Africa

The Impact of Smallholder Irrigation Scheme on Household Welfare in Farm-Managed Irrigation Scheme Communities in the Eastern Cape Province, South Africa

Characterization of plot holders at Mutale smallholder irrigation schemes in Limpopo province, South Africa

Characterization of plot holders at Mutale smallholder irrigation schemes in Limpopo province, South Africa

Evaluation of water productivity of smallholder irrigation along a Sand River, in the Maigobo watershed of northern Ethiopia

Sand dams are a type of rainwater harvesting technology that can increase groundwater recharge in dry land environments. They are constructed across seasonal sandy rivers and trap sand and water during floods. The sand acts as a natural filter and storage medium for the water, which can be extracted by the local communities through wells, pumps, or scoop holes. This research aims to evaluate agricultural water productivity based on water consumption (ETa) and biomass production of smallholder irrigation schemes along a sand river with a sand dam in the riverbeds of northern Ethiopia. Remotely sensed satellite data, WaPOR (Water Productivity through Open access of Remotely sensed derived data) database was used to estimate water productivity in the arid and semi-arid area. Following the installation of the sand dam at the irrigated parts of the Mai Gobo watershed, both the annual and seasonal values increased over a number of years, according to the spatial analysis of ETa and biomass production. For instance, the maximum seasonal ETa before the dam was about 70 mm/season, whereas after the dam the spatially analysed ETa reached 174 mm/season. Likewise, maximum seasonal biomass production of 1117 kg/ha and 4433 kg/ha were obtained before and after the construction of the sand dam, respectively. Agricultural water productivity at the irrigated plots of the Mai Gobo watershed was also improved from 1.4 kg/m3 to 2.9 kg/m3 before and after the sand dam respectively. Generally, the output of the study can be used as an input for the concerned stakeholder to take measures against the water scarcity problem in the study area. The study also contributes to the scientific knowledge and understanding of the hydrological and agronomical impacts of the sand dam in the arid and semi-arid regions.

Participatory mapping of irrigation schemes in Tanzania, Mozambique and Zimbabwe and their value for multi-level learning

This paper analyses the capacity of participatory mapping as a multi-level learning process to identify and overcome current barriers to productivity within small-scale irrigation schemes. The analysis is based on thirteen smallholder irrigation schemes in Tanzania, Mozambique, and Zimbabwe, where farmers, project officers and other key stakeholders participated in informal mapping teams to map the schemes. Critically, participatory mapping translated problems generally known by stakeholders into problems that were publicly known, making their resolution a shared responsibility. Hence, problems identified at both the scheme and plot levels led to immediate responses by the farmers, irrigator organizations, and government departments, boosting farmers’ agency and confidence and renewing their sense of scheme and plot ownership. It is important that irrigation agencies prioritize participatory processes and the use of informal networks to improve farmers’ understanding of their resource and management challenges and to build their sense of ownership and responsibility for effective management of irrigation schemes.

Water-energy-food linkages in community smallholder irrigation schemes: Center pivot irrigation in Rwanda

Water, energy, and food are linked in intricate ways in irrigated agriculture and understanding the interplay of these components is crucial for sustainable and profitable crop production, particularly in smallholder setting such as in sub-Saharan Africa. This study evaluates water-energy-food linkages, engineering and economic performance, irrigation decision making, and challenges faced around water management in a community-based mechanized irrigation scheme in Rwanda. The research is the first to analyze such as scheme, which uses technology typically used by large farmers in a smallholder setting. The study investigates the variation in water requirements and the relationship and impacts of this variability on crop yield for the crops grown in the scheme: maize, French beans, and dry beans. Observed irrigation decision-making analyses demonstrate a lack of irrigation planning during growth stages and significant field-to-field variation in irrigation; this is linked to yield reduction in major crops. Results suggest that farmers irrigated only 31% of modeled irrigation water in dry beans and 27% of modeled irrigation water in maize. An econometric model assessment is used to understand the relationship between yield and energy inputs. A related policy analysis considers the impacts of changes in crop and water management on field-level profits and system-level financial sustainability. This study has implications for understanding irrigation policies in the context of the water-energy-food nexus and decision-making in Sub-Saharan Africa.

Women in Agriculture: Irrigation as Empowerment Tool

Promoting women’s empowerment in agriculture is very vital since efforts towards ensuring food security have identified women farmers as key role players in many contexts and set-ups. This study aims to identify and understand the significant factors responsible for empowering women in smallholder irrigation schemes as these may play a crucial role in poverty reduction among women farmers. The authors applied a simple random technique to select 174 women from 8 irrigation schemes across Vhembe and Sekhukhune districts of South Africa. Primary data were collected on their demographics and empowerment using a modified Women Empowerment Agriculture Index developed by IFPRI. This index concludes that women are disempowered. The determinants of empowerment were estimated using multiple linear regression analysis. The results show that there wasa strong correlation between socio-economic characteristics and empowerment; however, only four out of eleven independent variables were significant (i.e., age, marital status, number of dependants and expenditure). The study provides policy suggestions to maintain and improve where women are empowered and to correct where they are disempowered.

Condition and Performance Assessment of Irrigation Infrastructure at Agri-Parks in Gauteng Province, South Africa

South African agriculture accounts for 62% of the national water demand. Almost 45% of the water is wasted. Therefore, irrigation systems need to improve their water-use efficiency (WUE). However, the WUE of smallholder irrigation schemes in the country, including Agri-Parks, is not precisely known. A study was performed at four Agri-Parks (Rooiwal, Soshanguve, Tarlton, and Westonaria) in Gauteng province to assess the condition and performance of the irrigation systems, as part of a project that aimed to develop a WUE model for smallholder irrigation systems. The Agri-Parks were equipped with efficient irrigation systems in forms of drip and microjets. The assessments were performed at the system component level in February–March 2021. A Condition Assessment Model (CAM), developed by ARC-NRE/AE, was used for the condition assessment. Enumerators observed the system components visually and assigned conditions, which they uploaded into the model to generate condition indices (CIs). Water conveyance efficiency (CE) and distribution uniformity (DU) were assessed on delivery and infield systems, respectively. The CI values ranged 4–6, implying significant deterioration had occurred. The CE was 61–78%, while the DU was 60–95%. The infield system CI correlated positively with the DU, suggesting the CI could predict the DU in drip systems, which was encouraging for the proposed WUE model. However, further research covering a longer period and more Agri-Parks is recommended.

Perception of climate change and coping strategies among smallholder irrigators in Zimbabwe

IntroductionAcross sub-Sahara Africa, governments and international aid agencies are making huge investments in smallholder irrigation schemes to enhance food security, climate resilience and economic transformation in rain-fed farming systems. Unfortunately, a majority of the smallholder irrigation schemes have performed dismally on these fronts. Climate change is a major exacerbating factor to existing challenges resulting in the poor performance of the schemes. Hence, it is crucial to understand smallholder irrigators' perceptions of climate change and current adaptation strategies to co-design appropriate and acceptable adaptation strategies to address water stress in the schemes. This area had received less significant research attention. This study aims to determine the perception of climate change and coping strategies in smallholder schemes.MethodsA mixed-method research strategy was used to collect data from 317 irrigation scheme farmers in three schemes (Exchange, Insukamini, and Ruchanyu) in Midlands Province. A binary logistic regression (BLR) method was used for data analysis.ResultsThe results suggest that scheme farmers have noticed changes in temperature and rainfall patterns. Results obtained from the model show that climate change perception was mainly influenced by age, gender, location, irrigation experience, and plot size. Farmers perceived that climatic change has resulted in decreased irrigation water availability, thus leading to poor yields. This study also shows that the main adaptation strategies to water stress include improving soil moisture conservation, construction of small-scale reservoirs, water charging and trade, setting clear water use priorities, and adoption of climate-resilient and short-season crop varieties. Perception of high temperatures, long dry periods, late rainfall, increase in the frequency of drought, shortening of cold season, and shortening of rain season influence adaptation strategies adopted by scheme farmers.ConclusionThis study offered useful data for policymakers and irrigation developers to develop appropriate policies and programs to improve the sustainability of schemes given current and projected water stress in Zimbabwe and sub-Sahara Africa in general.

Handheld NDVI sensor-based rice productivity assessment under combinations of fertilizer soil amendment and irrigation water management in lower Moshi irrigation scheme, North Tanzania

Handheld optical sensor was used to measure canopy reflectance at red region (656 nm) and near-infrared region (774 nm) to generate NDVI data for monitoring rice productivity under soil amendment with combinations of fertilizers at two levels of water regime in smallholder Irrigation Scheme, in Lower Moshi, North Tanzania. The study was carried out in an experimental design which consisted of two irrigation water levels (flooding and system of rice intensification) with multi-nutrients (NPK) and single nutrient (urea) application replicated three times in a randomized complete block design. Flood irrigation water was applied at 7 cm height throughout the growing season, while SRI treatment irrigation water was applied at 4 cm height under alternate wetting and drying conditions. The annual rates of fertilizers applied was 120 kg N/ha, 20 kg P/ha, and 25 kg K/ha. The variety SARO-5 was used in this experiment. Simple correlation coefficient (r) was used to measure the degree of association between field crop performance parameters (plant height, number of tillers, biomass, yield) and NDVI across growth stages and three positions of the sensor above the canopy in the tested fertilizer combinations and water regimes. Results show that at any given fertiliser combinations and water levels, there was no significant correlation between plant height and NDVI except for the plant height at a vegetative stage for 0.6 m above the crop canopy and booting stage at 0.3 m and 0.6 m above the canopy, respectively (P < 0.05). A good correlation was also observed between NDVI at booting and full booting stage regardless of the position of the sensor above the canopy and the number of tillers at full booting growth stage (P < 0.05). A significant relationship was observed between rice grain yield and NDVI at the vegetative, booting, and full booting stage. The simple linear regression models explained only slightly < 30% of the yield predictions by NDVI at the early stage of the crop growth, decreasing gradually to 5% at the full booting growth stage. Results demonstrate a positive linear relationship between rice grain yield and NDVI for the tested soil fertiliser amendments and irrigation water regimes. Thus, we conclude that handheld NDVI-based sensor can be used in smallholder rice yield predictions for optimising soil fertiliser use and irrigation water management. This allows future multi-functional land management within the soil–water-food nexus.

Evaluation of water-user performance in smallholder irrigation schemes in KwaZulu-Natal Province, South Africa: A stochastic meta-frontier analysis

Smallholder Irrigation Schemes (SIS) are pivotal in sustaining livelihoods and creating employment in rural communities of South Africa. However, despite the revitalization and rehabilitation of SIS by the government, the performance of farmers is still below par. This study evaluates the performance of water-users across four SIS in KwaZulu-Natal Province (KZN). Technical Efficiency was used as a proxy for performance and the Stochastic Meta-Frontier Analysis method was employed to measure the overall efficiency across 306 households. The efficiency model results showed that governance index, psychological capital, land tenure security, credit access and gender affect water-users' technical efficiency. The study concludes that interventions should be geared toward strengthening institutions and the empowerment of farmers through relevant training and access to credit. Furthermore, adequacy of water and its availability in the schemes should be improved to ensure profitability and productivity of water.

‘Our humanism cannot be captured in the bylaws’: How moral ecological rationalities and care shape a smallholder irrigation scheme in Zimbabwe

In this article, we bring concepts of institutional bricolage, moral ecological rationalities and care into engagement, to explain the everyday management of an irrigation scheme in Zimbabwe. In doing this we: (a) emphasise the constant processes of bricolage through which irrigators adapt to changing circumstances and dynamically enact irrigation management; (b) illustrate some of the key features of the contemporary, hybridised moral-ecological rationalities that shape these processes of bricolage; (c) show how motivations to care (for people, the environment and infrastructure) as well as to control shape the bricolaged management arrangements. Through this approach, we aim to contribute to expanding ways of thinking about rationalities, including those that express the aspiration to live well together with human and non-human others, including water and infrastructure. The focus on moral-ecological rationalities is central to our contribution to critical water studies. This sheds light on actual practices of governing water and relationships between society-water/people and the environment. In so doing it helps us to understand the possibilities of caring for natural resources.

Gendered perception of change in prevalence of pests and management in Zimbabwe smallholder irrigation schemes

A better understanding of gendered perception on the prevalence and management of pests in irrigated agriculture in the context of a changing climate can help recommend more gender-sensitive policies, particularly in smallholder farming systems. Limited studies have been conducted to assess gender differences in perception of the prevalence and management of pests among smallholder irrigation schemes especially in Zimbabwe. This study is the first one to assess gendered perceptions on the change in prevalence and management of pests in Exchange, Insukamini, and Ruchanyu irrigation schemes in Zimbabwe. Semi-structured questionnaires were administered using face-to-face interviews with participants. Data from focus group discussions and key informant interviews were used for validating data from questionnaire interviews. Mann-Whitney U test was employed to assess perception on the prevalence of pests between male and female farmers. Findings from this study depict that the females perceived a higher prevalence of bollworms (Helicoverpa armigera) (P ≤ 0.01), fall armyworms (Spodoptera frugiperda) (P ≤ 0.01), red spider mites (Tetranychus urticae) (P ≤ 0.01), and maize grain weevils (Sitophilus zeamais) (P ≤ 0.01) than males, while males perceive a higher prevalence of termites (Isoptera) (P ≤ 0.01) and cutworms (Noctuidae) (P ≤ 0.01) than females. Both male and female farmers perceived a greater increase in prevalence of aphids (Aphidoidea). Here, we show that farmers’ perceptions of changes in pest prevalence and pest management strategies differ by gender. Gender perception on change in prevalence of pests can be a valuable resource for the sustainable development of smallholder irrigation farming system and scientific research.

Socio-demographic, institutional and governance factors influencing adaptive capacity of smallholder irrigators in Zimbabwe.

The provision of resilience and adaptation to climate change to smallholder irrigation communities is a critical component in implementing common pool resource management. Institutions in many smallholder irrigation schemes in developing countries are diverse and have potential to contribute to building climate resilience and improving livelihoods of smallholder irrigator. Human behaviour, institutional capacity and culture play important roles in shaping adaptive capacity of communities to climate change. Although much is known about how these contribute to this adaptive capacity, research focusing on their interaction is limited. In order to close this the gap, this study seeks to explore how socio-demographic, governance and institutional factors influence adaptive capacity in Exchange, Insukamini and Ruchanyu irrigation schemes. Questionnaire-based interviews, group discussions and key informant interviews were used for data collection. Adaptive capacity calculated using the livelihood vulnerability model was used as the dependent variable for this study. Ordinary least square regression was used to assess socio-demographic, institutional and governance factors influencing adaptive capacity in the smallholder irrigation scheme. The study reveals that adaptive capacity is influenced by age, gender, education, land tenure security, irrigation committee satisfaction, cooperatives, and interaction of factors. The link between age and gender were negatively moderated by awareness of irrigation policies, access to credit and land tenure security. Assessing factors influencing adaptive capacity help to improve the livelihoods of scheme farmers in the face of climate change.

Socio-Economic Factors and Water Footprint in Smallholder Irrigation Schemes in Zimbabwe

Despite the need to grow crops with low water consumption needs, given the increasing water stress across many regions of the globe, assessments of crop water footprint (WFP) values have not received significant research attention in Zimbabwe. This unique study is the first of its kind to assess the mediation effect between socio-economic factors and crop WFP among smallholder irrigation schemes in Zimbabwe. A total of 317 farmers from three schemes in Midlands Province in Zimbabwe participated in this study. The following were the main findings in terms of the examined variables: (1) Schemes (p &lt; 0.01), Gender (p &lt; 0.05), and Maint (p &lt; 0.1) all decreased WFP_Maize; (2) education showed a reduction effect on the link between scheme maintenance and WFP_Maize; (3) secondary education has a higher impact on the magnitude of Maint on WFP_Maize; and (4) Maint and WFP_Maize have a positive correlation. This study illustrates the interaction of socio-economic factors on WFP and has substantial implications for simultaneously addressing the sustainable consumption of water for crop production, food security, and malnutrition in a changing climate.

Risks of Climate Change on Future Water Supply in Smallholder Irrigation Schemes in Zimbabwe

Smallholder irrigation schemes (SISs) have been portrayed as a panacea to climate change adaptation. However, there is an emerging discourse that established schemes are becoming vulnerable to increased climate variability and change, particularly increased water stress. This paper reviews the existing knowledge on risks of climate change and variability in water supply in smallholder irrigation farming in Zimbabwe. In addition, this paper highlights adaptation options to climate change in SISs. Data for this review were collected systematically from peer-reviewed and published literature. The literature used for this study showed that SISs in Zimbabwe are beset with water stress, competing water needs and the outbreak of pests and diseases, which have been related with climate change and variability. Climate change is making Zimbabwe more arid through decreasing precipitation and warming. Droughts and floods are increasing in frequency and severity. Damage by floods is increasing exponentially, impacting environments, ecological systems and national economies. Climate change affects SISs’ productivity and decimates the livelihoods of scheme farmers. The review suggests that there is a need for increased adsorptive, adoptive and transformational capacity for SISs to obtain a new state of resilience from adverse effects of increased climate variability and change. This review recommends understanding and prioritizing solutions to vulnerability to climate change in SISs.

Crop Cultivation at Wartime – Plight and Resilience of Tigray’s Agrarian Society (North Ethiopia)

ABSTRACT During the 2021 conflict in Tigray (north Ethiopia), crop cultivation has been hampered by warfare. Oxen have been looted and killed, farm inputs and tools destroyed by Ethiopian and Eritrean soldiers. Farmers felt vulnerable out in the open with their oxen. To produce, farmers evaluated risks involved with ploughing and organised lookouts. Overall, a large part of the land had been tilled in difficult conditions, and crops sown that require minimal management, without fertiliser, what led to low yields. True Colour Composite images, produced from Sentinel satellite imagery show that smallholder irrigation schemes were operational. There was a shift from commercial crops to cereals. The situation in western Tigray was particular, as there has been ethnic cleansing of the population and often the 2020 rainfed crops had even not been harvested. Overall, our findings show that the Tigrayan smallholder farming system is resilient, thanks to community self-organisation, combining common strategies of agrarian societies in wartime: spatio-temporal shift in agricultural activities to avoid the proximity with soldiers and shifts in crop types. Rather unique is the relying on communal aid, while the blockade of the Tigray region made that outmigration and off-farm income were no options for the farmers.

The status and challenges of a modern irrigation system in Kenya: A systematic review

AbstractThe modernization efforts of the irrigation subsector in Kenya have been hampered by several challenges. This review describes the status and challenges facing irrigated agriculture in Kenya. The results indicated that as of 2018, the developed irrigation schemes covered an area of 222,240 ha, which is 16% of the irrigation potential of 1.34 million ha. Most large‐scale irrigation schemes use the furrow system. Private and commercial farms and smallholder irrigation schemes use modern irrigation systems. The major challenges to irrigation development are technical, socio‐economic, and institutional. The main technical challenges include poor water infrastructure, water scarcity, and poor water quality. The main socio‐economic challenges include the high cost of modern irrigation systems, inadequate credit facilities, and market inaccessibility. The institutional challenges include the existence of a pluralistic legal framework, inadequate participation by farmers, including women farmers, and poorly organized irrigation water user associations. However, the future of irrigation development is bright through climate change adaptation strategies such as solar‐powered irrigation systems and rainwater harvesting.

Productivity and profitability of sweet potato (ipomoea batatas l.), dry bean (Phaseolus Vulgaris) and maize (Zea mays l.) as selected field crops in irrigated smallholder agricultural enterprises (ISAEs) in Vhembe District, Limpopo Province, South Africa

The study was conducted as part of assessing the productivity and profitability of irrigated smallholder agricultural enterprises in the Vhembe district. Agro-ecological conditions at Upper Mutale valley (sub-humid) and Madimbo Corridor smallholder irrigation schemes (semi-arid) are significantly different. This confirms that the variables of smallholder irrigation schemes are affected by diversity and similarities attributed to different livelihood needs. The purpose of the study was to assess the influence of productivity and profitability on irrigated smallholder agricultural enterprises in the Vhembe District. A representative sample was based on the number of irrigated smallholder irrigation entrepreneurs per irrigated smallholder irrigation production area within the two identified agro-ecological zones. Primary data were collected using a questionnaire and village walk (observation). At least 294 women and youth smallholder irrigation entrepreneurs were sampled for interviews and prompt responses on the influence of productivity and profitability of selected field crops (Dry bean, Sweet Potatoes and Maize) on irrigated Smallholder Agricultural Enterprise. The study applied both primary and secondary data collection instruments. An average selected mean output of irrigated smallholder agricultural product were determined. The results through comparison between informal and formal markets show that the ISAEs who rely on the informal market is making more profit than the formal market. In selling through the formal market, the market deducts 5% of commission while the market agent deducts 7.5% of sales on the gross value of the sold product. This doesn’t include the transportation charges to the market. The Farm Gate market opportunity seems to be the most predominant approach of marketing at ISAEs. These results re-affirms that ISAEs can also be alternative employment to Women and Youth who remain at home while their counterpart is looking for employment in cities. In the end, the study provides strong motivation on socio-economic impact assessment examines how an irrigated smallholder agricultural area has and will change the lives of current and future residents of a community and its local economy.

Demography of smallholder agricultural women and youth enterprises and their association with the cultivation of the tomato (Solanum Lycopersicum) vegetable crop

The study was conducted at the Madimbo corridor and upper Mutale valley smallholder irrigation schemes. The purpose of the study was to characterize smallholder agricultural women and youth entrepreneurs (SHAW-YE). A semi-structured household questionnaire together with facilitation was used to survey a sample, purposively focusing on Smallholder Agriculture Women and Youth Enterprises (SHAW-YE). The sample was comprised of 294 respondents with sub-samples of respondents selected through gender category, age category, and gender by age category. The study revealed that the SHAW-YE are characterized by small land areas under cultivation. There were some associations between age, education, and income of SHAW-YE with their capacity to produce tomatoes. Participation of women was 48.4% compared to 20% of men in the winter production of tomatoes. Production participation by SHAW-YE farmers for summer revealed that women were participating at 9.7% compared with 13.3% for men. The participation of SHAW-YE around the ages of 36-59-year was at 52.9% while that for ages &gt;60-year was at 51.5%. The main source of variation may be the level of experience that the said age group of SHAW-YE may have in the production of tomatoes compared to 29.6% of 18–35-year participants. About 61.7% of SHAW-YE were at the level of Adult Basic Education &amp; Training (ABET). About 45.8% of the SHAW-YE earned less than R5000.00 compared with 50.7% earning more than R5000.00. Market channels and access should be promoted for SHAW-YE to enable the throughput of tomatoes to not only informal but also fresh produce and retail markets.

Water-Energy-Food Linkages in Shared Smallholder Irrigation Schemes

Water-Energy-Food Linkages in Shared Smallholder Irrigation Schemes