Agricultural Activities Research Articles

Assessing the integration of agroecological principles in smallholder farming systems in North African irrigated plains

ABSTRACT This study assesses the extent to which growers integrate the 13 principles of agroecology within their farm activities. This is a first step that helps to determine the changes required in different farm components to foster the adoption of agroecology. We used the holistic Farm-Level Agroecology Criteria Tool (F-ACT) to assess the alignment with agroecological principles of 31 farms representative of smallholder irrigated family farms in the Merguellil Plain region of central Tunisia. Although various agroecological practices were implemented, the results revealed little integration of agroecological principles at the farm level, estimated at 34% of the full transition. In a difficult production resource access context, recycling and reducing inputs were the principles mostly applied, with the goal of improving resource use efficiency and farm system resilience. More specialized and market-oriented farms tended to rely on conventional practices, while diversified farms, often cultivating their own land, exhibited more sustainable practices. Although producers’ dominant rationale was to improve their market access, thereby often resorting to more conventional practices, we nevertheless noted interesting practices such as mixed crop and livestock production, which could facilitate the transition to more agroecological systems in these lowlands where production factors are scarce.

Economic Diverification in Nigeria: Agriculture in Perspective

This study examines economic diversification: agricultural in perceptive. In particular the study examines the impact of investment in agricultural sector in achieving economic diversification between periods spanning from the years 2000 to year 2022. Time series secondary data were sourced from Central Bank Statistical Bulletin (2022) and World Bank Development Indicators (2024). Autoregressive Distributed Lag Regression Estimate (ARDL) analysis was conducted with the aid of E-view 10. Findings of this study reveals that agriculture credit guarantee scheme fund for cash crops and livestock have negative and significant impact on economic diversification. More so, agriculture credit guarantee scheme fund for food crops equally has negative and insignificant impact on economic diversification. However, grand total of agriculture credit guarantee scheme fund on agricultural commodities has positive and insignificant impact on economic diversification. Based on study findings, the following recommendations are suggested; that governments at all levels should as a matter of urgency should sustain funding of agriculture sectors and provide necessary infrastructure in the rural areas where majorities of agricultural activities take place in order to diversify her economy. More so, stakeholders in the agricultural sectors mainly the farmers should take advantage of loanable fund available to them and channelled it to appropriate crops that will yield investment return. In addition, it is also recommended that monetary policy authority should look inward to determine why agricultural credit guarantee scheme fund has negative significant impact on all the three categories of agricultural commodities identified. This can be achieved through close monitoring and adequate supervision of the loan disburse to the direct beneficiaries. Lastly, investment in human capacity in agricultural sector is away forward for economic diversification.

Protective Effects of Annona Atemoya Extracts on Inflammation, Oxidative Stress, and Renal Function in Cadmium-Induced Nephrotoxicity in Wistar Rats.

Cadmium (Cd), a highly toxic heavy metal from agricultural activities, and its exposure can lead to impaired renal function by increasing reactive oxygen species. The atemoya fruit is known for its high phenolic and antioxidant compounds. This study aimed to evaluate the effects of atemoya extracts on renal function, oxidative stress parameters, and inflammatory biomarkers in a cadmium-induced nephrotoxicity model. Three aqueous extracts were prepared from different parts of the atemoya fruit: seeds, peel, and pulp. Twenty-five male Wistar rats were allocated into four groups: control, seed, peel, and pulp extracts at 2 g/kg for 25 days. All treatment groups administered intraperitoneal injections of cadmium chloride (CdCl2) (2 mg/kg) to induce renal damage. The cadmium-treated groups showed decreased creatinine clearance, SOD, CAT, and GPx activities (p < 0.05) and increased serum levels of TNF-α and IL-6 compared to the control group (p < 0.05). The treatment with seed, peel, and pulp extracts increased creatinine clearance (p < 0.05), increased SOD, CAT, and GPx activities (p < 0.05), and reduced serum levels of TNF-α and IL-6 compared to the Cd group (p < 0.05). This study supports the use of atemoya as a promising candidate for mitigating nephrotoxicity and highlights the importance of its antioxidant and anti-inflammatory properties in renal health.

Evaluating Socio-Economic and Environmental (SEE) Impact of Artisanal and Small-Scale Mining (ASM) of Gemstones on Livelihood in the Ijero-Ekiti Community, Nigeria

Artisanal and small-scale mining (ASM) has experienced explosive growth in recent years due to the rising value of mineral prices and the increasing difficulty of earning a living from agriculture and other rural activities, in that regard the Gem Mining Industry (GMI) has come to be one of the major sources of income and employment for the country, especially the local people of Ijero LGA in Ekiti State. Artisanal and Small-Scale mining effects in the state were studied using structured questionnaires. This research draws on primary data collected from households and artisanal miners. The questionnaire was designed to answer the following questions about the socio-economic impacts of small-scale tourmaline mining on local community livelihoods in Ijero-Ekiti, furthermore, the research employs of a descriptive survey design, to understand the effects of mining in the study area. Results indicate that overdependence on mining and poor diversification of livelihood options has hindered the development of rural communities. The equitable distribution of employment opportunities and revenue from small-scale mining remains a challenge for sustainable local development.

Economic complexity and deforestation in the Brazilian Amazon

As the Amazon rainforest faces ever-increasing deforestation, finding a balance between conservation and economic progress becomes imperative. This study investigates the relationship between regional economic complexity (ECI-R) and deforestation in municipalities within the Brazilian Amazon between 2006 and 2021. Employing different econometric techniques, we untangle the multifaceted factors determining land use choices while considering variables associated with agriculture, extraction, and livestock activities. Rigorous testing confirms the validity of our findings. The results suggest an “environmental Kuznets curve” at play in the Amazon. This means that a slight increase in regional economic complexity (0.1 unit) initially leads to a significant rise in deforestation (28 %) but is followed by a decrease (8.4 %) in the following year. Interestingly, environmental fines appear to be a powerful tool for controlling deforestation. Further analysis using Probit regressions reinforces the key roles of economic complexity and environmental enforcement. Municipalities with higher regional complexity were 20 % more likely to experience low deforestation and high employment growth between 2006 and 2011. However, this trend reversed in later periods. Ultimately, the results indicate a complex relationship between economic complexity and deforestation. These findings highlight governments’ critical role in promoting sustainable development in the Amazon. There are limits to such an approach but supporting “green” industries and curbing deforestation-related activities can steer the region towards a more prosperous and environmentally responsible future.

Assessment of agroclimatic resources in agricultural landscapes of the Turkestan region of the Republic of Kazakhstan Askha

The article presents the scientific results of a study assessing agroclimatic resources in agricultural landscapes located in various natural zones of the Turkestan region of the RK (Republic of Kazakhstan). The research methods included classical and modern methods of mathematical statistics using digital technology and time series graphs to develop a mathematical model for climatic and hydrological indicators. Assessment of changes in indicators of agroclimatic resources in agricultural landscapes for 1941–2020 showed that the sum of air temperature, evaporation from the water surface and radiation balance of the daytime surface, characterising the energy resources of landscapes, increased by 10–15%, which contributes to increase in the total water consumption of agricultural land by 10–12%. Meanwhile, the decreasing tendency of the amount of precipitation by 5–10% in all natural climatic zones of the region has become one of the factors leading to a decrease in the natural moisture supply of the soil and vegetation cover of landscapes by 10–15%, acting as important environment-forming and ecological functions. The combined impact of these environment-forming factors has become the key reason for the increase in the deficit of agricultural land water consumption by 15–20%, the reduction of solar energy costs for the soil-forming process by 10–15% and the increase of the climate aridisation, and has become a signal for the need in the safety of agricultural activities, requiring the development of a set of adaptive measures to mitigate this process in the region.

Sustainable livelihoods through cashew cultivation: insights from smallholder farmers in the southern region of India

Cashew cultivation has emerged as an important agricultural activity in promoting sustainable livelihoods for smallholder farmers. The present study investigates the impacts of cashew cultivation on sustainable livelihoods of smallholder farmers in the Southern region of India, addressing a significant research gap in the understanding of how this crop affects various aspects of farmers' lives. Using a mixed-methods approach, the study reveals that, cashew farming significantly increases farmers’ income, leading to improvements in food security, education, social status, and standard of living. These findings contribute to new insights into the socio-economic and environmental dimensions of cashew cultivation, offering a holistic understanding of its role in rural development. Additionally, the study also emphasizes the need for government policies supporting smallholders in cashew farming, including training, access to quality seeds, and best agricultural practices. Social welfare initiatives and cooperatives can improve the overall well-being of cashew farming communities. Research and development should prioritize climate-resistant cashew varieties to address environmental challenges linked to cashew cultivation. The study’s results also provide a foundation for future research and policy formulation aimed at enhancing the practice of cashew farming for sustainable livelihoods.

Spatiotemporal Analysis of Open Biomass Burning in Guangxi Province, China, from 2012 to 2023 Based on VIIRS

Open biomass burning has significant adverse effects on regional air quality, climate change, and human health. Extensive open biomass burning is detected in most regions of China, and capturing the characteristics of open biomass burning and understanding its influencing factors are important prerequisites for regulating open biomass burning. The characteristics of open biomass burning have been widely investigated at the national scale, with regional studies often focusing on northeast China, but few studies have examined regional discrepancies in spatiotemporal variations over a long timescale in Guangxi province. In this study, we used the Visible Infrared Imaging Radiometer Suite (VIIRS) 375 m active fire product (VNP14IMG), combined with land cover data and high-resolution remote sensing images, to extract open biomass burning (crop residue burning and forest fire) fire points in Guangxi province from 2012 to 2023. We explored the spatial density distribution and temporal variation of open biomass burning using spatial analysis methods and statistical methods, respectively. Furthermore, we analyzed the driving forces of open biomass burning in Guangxi province from natural (topography, climate, and plant schedule), policy, and social (crop production and cultural customs) perspectives. The results show that open biomass burning is concentrated in the central, eastern, and southern parts of the study area, where there are frequent agricultural activities and abundant forests. At the city level, the highest numbers of fire points were found in Baise, Yulin, Wuzhou, and Nanning. The open biomass burning fire points exhibited large annual variation, with high levels from 2013 to 2015 and a remarkable decrease from 2016 to 2020 under strict control measures; however, inconsistent enforcement led to a significant rebound in fire points from 2021 to 2023. Forest fires are the predominant type of open biomass burning in the region, with forest fires and crop residue burning accounting for 76.82% and 23.18% of the total, respectively. The peak period for crop residue burning occurs in the winter, influenced mainly by topography, planting schedules, crop production, and policies, while forest fires predominantly occur in the winter and spring, primarily influenced by topography, climate, and cultural customs. The results indicate that identifying the driving forces behind spatiotemporal variations is essential for the effective management of open biomass burning.

A Methodological Framework to Enhance Potential Spatial Planning to Support Agroecological Transition at the Scale of Local Territories

Agroecological transition requires research and actions at the scale of local territories, in which agricultural activities interact with the environment and natural resources depending on a territory’s spatial configuration. To support the agroecological transition, there is an urgent need to design and implement new spatial configurations. For this, local public authorities in France can be considered as an interesting level of governance, because of their skills in spatial planning and their interest in agriculture, to ensure the ecological transition of their territory. However, new methodological frameworks need to be developed to support the design of new spatial configurations of territories, by constructing representations of the territory that consider both agricultural and socio-environmental issues, and by involving agricultural and non-agricultural stakeholders so that both can project themselves into the new spatial configurations. We developed a new methodological framework at the interface between landscape agronomy and landscape architects’ approaches, and experimented with applying this framework in the Urban Community of Dunkirk (UCD), which was performing a spatial planning approach called a Landscape Plan and proposing to create an Agricultural Park. The results show that the implementation of the methodological framework enabled the construction of a spatially explicit and place-based representation including the spatial issues of farming systems. These representations enable a local authority’s stakeholders to enhance their knowledge of the agricultural issues and consider changes in the spatial configuration of the Agricultural Park. In the discussion, we question the adaptation of the framework in rural territory and highlight the limitations of local authorities as the level of governance at which to address the agroecological transition at the territorial scale.

Navigating the complex policy landscape for carbon farming in The Netherlands and the EU

Background The EU carbon removal and carbon farming (CRCF) framework sets the quality requirements for voluntary greenhouse gas certification schemes for i) permanent removal, ii) temporary carbon storage in long-lasting products, iii) temporary carbon storage from carbon farming, and iv) soil emission reduction. The next step is to develop “tailored certification methodologies for different types of carbon removal activities.” Via CRCF compliant certification schemes, certificates can be issued and sold to generate extra funding for carbon farming via voluntary carbon markets or other (future) performance-based incentive schemes (e.g., Agri sector Emissions Trading Scheme). Method We provide a qualitative assessment of the complex landscape of carbon farming incentive schemes and their associated monitoring, reporting, verification, and certification (MRV-C) frameworks. To illustrate these complexities, we take the farmers’ perspective of a Dutch dairy farmer that wants to implement different carbon farming activities (i.e., a portfolio), while aiming to secure a decent farm-level income. We discuss the farmers’ challenge by analyzing different options and routes for the financial valorization for several carbon farming activities. Results We find that the incremental MRV-C and incentive schemes, like the EU CRCF and potential agri-ETS are likely to add to the existing administrative burden for (carbon) farmers in the EU. Proper alignment, integration and standardization of the EU CRCF with existing MRV-C infrastructure(s) is needed to limit the administrative burden and transaction costs. Also, there is a need to provide better ex-ante clarity to (carbon) farmers and investors on the complementarity of incentive schemes from different policy domains (e.g., agriculture, climate, energy, bioeconomy). Conclusion We argue that the complexity of the MRV-C and incentives landscape ads to the administrative burden and flag this a potential source of inertia for investments in carbon farming. We conclude with recommendations to simplify and streamline the policy mix and MRV-C processes.

Effectiveness of Radio Agricultural Programmes in Scaling Up Farming Activities of Smallholder Farmers in Bushenyi District

The study was about effectiveness of radio agricultural programmes in scaling up farming activities of smallholder farmers in Bushenyi district. The specific objective was to; determine the factors associated with radio listenership and application of the knowledge gained through agricultural radio messages. The study was a descriptive-cross sectional survey employing both quantitative and qualitative approaches to data collection and analysis. Data was gathered from a sample of 360 respondents across 18 listener groups of agricultural extension programs using questionnaire and interview guide. Data was analyzed using SPSS version 20.0 to generate both descriptive and inferential statistics. The study concluded that that age bracket (39 – 48), radio ownership, place of residence, negative attitudes and perceptions, limited agricultural spaces, media exposure and investment capital were some of the factors associated with radio listenership and application of the knowledge gained through agricultural radio messages in the area. The study concluded that agricultural extension radio programmes have a wider coverage and have been so pertinent to smallholder farmer’s activities, however listenership and application of the knowledge gained through agricultural radio messages is still hampered by certain impediments that call for urgent address. This study therefore recommends that the programme should be changed to evening when most farmers are available in their houses. Radio producers and program hosts should do this through programme planning which informs the selection of topics, presentation of the topics on radio with interviews from selected experts and farmers.

Source-oriented stochastic health risk assessment of toxic metals in soil via a hybrid model and Monte Carlo simulation

Toxic metal contamination in soils poses significant hazards to the environment and human health; thus, quantitative assessment of the sources and risks of metal contaminants are urgently needed. A hybrid model that integrates the positive matrix factorization (PMF) and random forest (RF) methods was proposed to quantify the sources of toxic metals in soils by combining diverse environmental variables (source proxies) in this study. In addition, a health risk assessment and Monte Carlo simulations were integrated to estimate the source-oriented stochastic health risk. The results suggested that, except for Ni, which exhibited moderate contamination, other toxic metals (As, Cd, Cr, Hg and Pb) presented slight contamination. Four sources (agricultural activities loaded heavily by As, atmospheric deposition loaded heavily by Hg and Pb, natural sources and mining activities loaded heavily by Cr and Ni, and industrial activities loaded heavily by Cd) were defined and explained 23.44 %, 26.65 %, 30.13 % and 19.78 % of the total variance in toxic metals, respectively. The principal route of exposure (i.e., ingestion), the population at highest risk (i.e., children), and the most hazard-inducing metals (i.e., As and Cr) were determined. Agricultural activities and the combination of natural sources and mining activities demonstrated certain degrees of noncarcinogenic risk to children, with exceedance ratios of 2.20 % and 2.56 %, respectively. Additionally, the combination of natural sources and mining activities demonstrated probabilities for significant carcinogenic risk to adults and children of 0.59 % and 3.76 %, respectively. To reduce the health risks of toxic metals in soils and to protect food and ecological safety, strict regulations should be established to control the discharge of waste from mining and agricultural activities.

Source apportionment and influencing factors of surface water pollution through a combination of multiple receptor models and geodetector

In line with sustainable development goals (SDGs), precise quantification of water pollution and analysis of environmental interactions are crucial for effectively safeguarding water resources. In this study, Nemerow's pollution index was used to evaluate water quality, three receptor models were used to identify pollution sources, and Geodetector analysis was applied to explore environmental interactions in the North Shangyu Plain, Southeast China. Using 5207 surface water samples from September 2023 with 11 physicochemical parameters, the results showed that surface rivers in the North Shangyu Plain exhibited varying degrees of pollution: slight pollution upstream, moderate pollution in midstream and downstream, and concentrated high pollution in certain areas, with TN, CODCr, and TP as the primary pollutants. Multimethod source apportionment significantly improved the accuracy of pollution source attribution and identified five main sources: domestic sewage (1.42%–3.54%) characterized by NO3-N, phytoplankton source (38.43%–50.05%) indicated by chl and PC, agricultural cultivation (16.1%–17.63%) marked by TP and CODMn, industrial wastewater (17.64%–25.1%) primarily associated with TN, and natural source (10.32%–13.26%) characterized by DO, NH3-N, and CODCr. Influencing factor analysis validated the source identification. Natural factors had minor impacts on water parameters, while pollution control from agricultural activities was suggested to diversify fertilizer types rather than merely reduce quantities. The combined effects of industrial and aquaculture activities intensified pollution from TN, chl, and PC, underscoring the need for targeted management practices. This study showed the objectivity and reliability of using a combined approach of multiple receptor models and Geodetector to evaluate the river water quality status, which helps assist decision-makers in formulating more effective water resource protection strategies.

Hydrological processes in multi-layered aquifers of a karst watershed with coal mining activity: Insights from hydrochemistry and isotopes

Study regionThe Laochang Karst watershed (LCKW) is located in eastern Yunnan Province, southwestern China. It is the representative karst area affected by coal-mining activities in southwestern China. Study focusIdentifying hydrological processes of multi-layered aquifers in karst watersheds is challenging due to complex natural and anthropogenic processes. This study attempts to clarify the hydrological conceptual model of the LCKW using hydrochemistry and D, O, Sr, S, and C isotopes. New hydrological insights for the regionSurface water and multi-layered groundwater have the hydrochemical types of SO4-Ca·Mg, HCO3·SO4-Ca, and HCO3-Ca. Meteoric water and condensate were the major recharge sources. The main processes dominating hydrochemical compositions consist of sulfide oxidative dissolution, carbonate dissolution, positive cation exchange, and agricultural activities. Elevated SO42− concentration in the mine water, river water and shallow coalbed water mainly originated from the oxidation of pyrite in the coal-bearing strata of the Longtan Formation. whereas the deeper layers and groundwater away from the mines were hardly contaminated by SO42− due to the presence of aquiclude. HCO3− concentrations of surface water and multi-layered groundwater were mainly derived from carbonate dissolution and soil CO2, and mine water was also influenced by atmospheric CO2. Positive cation exchange contributed to increasing Na+ concentration. Agricultural activities contributed NO3−, Cl−, and K+ ions in aquifers, especially near large karst fallout caves. A hydrological model of multi-layered aquifers in the LCKW was built based on the above results. These findings will provide valuable guidance for understanding the hydrological processes of complex karst watersheds worldwide.

Inequality and Poverty of Privately Owned Forests Farmers in Rural Areas of Indonesia

Land limitation dramatically affects people with land-based livelihoods, such as farmers, and is often an obstacle to earning sufficient income for their family’s needs. Privately owned forests (POFs) are a land-based farming activity with a long history in Indonesian society. This study aimed to determine the socio-economic conditions, inequality, poverty, and livelihood dynamics of POF farmers. The research was conducted in three villages in Ciamis Regency, West Java Province, Indonesia. The research was conducted from February to May 2022 through structured, questionnaire-based interviews and in-depth interviews. The number of respondents was 170 POF farmers selected by simple random sampling in each village: 60 in Kalijaya village (18% of 325 farmers), 55 in Mekarjaya village (35% of 154 farmers), and 55 in Hujungtiwu village (37% of 148 farmers). The data obtained were processed using the Gini index and Poverty Line calculations, and analyzed descriptively. The results of this study show that POF farmers are dominated by productive age, long farming experience and low education. POF is the most dominant land use in the three research locations, but the income and contribution of POF are high only in Kalijaya village and lower in Mekarjaya and Hujungtiwu villages. Regression analysis indicates that land has a strong positive impact on farmers’ income. Land inequality was present in farmland, paddy fields, and POF land. The overall level of income and land inequality was less equitable in all locations. Land and income from POFs and non-POFs worked together to reduce POF farmers’ income and land inequality for POF farmers. Poverty was also more widespread among POF farmers in Mekarjaya and Hujungtiwu communities, where average land ownership was low. Farmers’ strategies to deal with this condition include continuing to farm the land but also diversifying their work both within and outside the village. Policymakers can utilise this information to promote or incentivize POF farmers to optimize POF management and improve their families’ living standards.

Non‐Native Invasive Fish Species (NIFS) in Inland Waters of India: Management Issues, Strategies and Suggestions

ABSTRACTIn India, there are 626 non‐native invasive fish species (NIFS), with 16 becoming invasive in inland waters, adversely impacting native biodiversity, and fisheries by altering the abundance of NIFS in commercial catches. Scientific findings highlight that the movement of NIFS interacts with agricultural activities and the evolving environment, facilitating their spread and establishment. The scenario of NIFS invasion disrupts biological communities, ecosystem services and fisherfolk livelihoods. Despite the implementation of existed guidelines, issues related to NIFS have persisted and escalated over time scale putting increased pressure on indigenous aquatic biological resources in inland waters. This paper suggests the need of framing a new management plans, guidelines and regulatory policies to control NIFS invasions, protecting riverine fish biodiversity and ecosystem services. Proposed management strategies include functional response (FR) and adaptive response (AR)‐based approaches, which are discussed to address NIFS management in inland waters.

Successes and Failures of the Implementation of the Rural Development Programme 2014–2020 Measure “Agri-Environment and Climate” in Lithuania

The focus on environment and climate-friendly farming is increasingly important in the European Union (EU) Common Agricultural Policy (CAP). Activities of the Measure M10 “Agri-environment and Climate” of the Rural Development Programme (RDP) 2014–2020 were those policy instruments that pursued environmental and climate goals over large areas under agricultural activities, but their effectiveness is still being questioned. After evaluating implementation successes and failures of the activities of the Measure M10 “Agri-environment and Climate” of the Lithuanian RDP 2014–2020, we aim to contribute to policy instruments that are better designed, more effective, and more attractive for farmers to achieve environmental and climate goals. This research was conducted in several stages: (1) a thorough analysis of the Measure M10 and its implementation; (2) analysis of the Measure M10 activities’ contribution to the policy target areas; (3) multi-criteria evaluation of the activities; (4) survey of beneficiaries and discussions in the focus groups. The data available from the Ministry of Agriculture of the Republic of Lithuania, Agricultural Data Center, and National Paying Agency under Ministry of Agriculture of the Republic of Lithuania was used for the analysis. Analysis of the strategic documents and data on the implementation of Measure M10 was supplemented with results from studies focused on the environmental impact of the implementation of Measure M10 in Lithuania. Multi-criteria evaluation methods were used to arrange the activities of the Measure with respect to the selected indicators. The results from the survey of beneficiaries and discussions in the focus groups let us better clarify the motives, experiences, and preferences of farmers’ participation in the activities of Measure M10. The questionnaire was distributed to 2455 beneficiaries through the National Paying Agency and 342 answers were received back, i.e., 13.9%. Five discussions in focus groups, formed from farmers participating and not participating in the activities, representatives of implementing institutions, and employees of consulting and scientific institutions, were organized. The research has revealed areas for improvement in Measure M10, and suggestions for improvement were prepared to better achieve environmental and climate objectives.

Phasic and periodic change of drought under greenhouse effect

Purpose Drought is the primary disaster that negatively impacts agricultural and animal husbandry production. It can lead to crop reduction and even pose a threat to human survival in environmentally sensitive areas of China (ESAC). However, the phases and periodicity of drought changes in the ESAC remain largely unknown. Thus, this paper aims to identify the periodic characteristics of meteorological drought changes. Design/methodology/approach The potential evapotranspiration was calculated using the Penman–Monteith formula recommended by the Food and Agriculture Organization of the United Nations, whereas the standardized precipitation evaporation index (SPEI) of drought was simulated by coupling precipitation data. Subsequently, the Bernaola-Galvan segmentation algorithm was proposed to divide the periods of drought change and the newly developed extreme-point symmetric mode decomposition to analyze the periodic drought patterns. Findings The findings reveal a significant increase in SPEI in the ESAC, with the rate of decline in drought events higher in the ESAC than in China, indicating a more pronounced wetting trend in the study area. Spatially, the northeast region showed an evident drying trend, whereas the southwest region showed a wetting trend. Two abrupt changes in the drought pattern were observed during the study period, namely, in 1965 and 1983. The spatial instability of moderate or severe drought frequency and intensity on a seasonal scale was more consistent during 1966–1983 and 1984–2018, compared to 1961–1965. Drought variation was predominantly influenced by interannual oscillations, with the periods of the components of intrinsic mode functions 1 (IMF1) and 2 (IMF2) being 3.1 and 7.3 years, respectively. Their cumulative variance contribution rate reached 70.22%. Research limitations/implications The trend decomposition and periods of droughts in the study area were analyzed, which may provide an important scientific reference for water resource management and agricultural production activities in the ESAC. However, several problems remain unaddressed. First, the SPEI considers only precipitation and evapotranspiration, making it extremely sensitive to temperature increases. It also ignores the nonstationary nature of the hydrometeorological water process; therefore, it is prone to bias in drought detection and may overestimate the intensity and duration of droughts. Therefore, further studies on the application and comparison of various drought indices should be conducted to develop a more effective meteorological drought index. Second, the local water budget is mainly affected by surface evapotranspiration and precipitation. Evapotranspiration is calculated by various methods that provide different results. Therefore, future studies need to explore both the advantages and disadvantages of various evapotranspiration calculation methods (e.g. Hargreaves, Thornthwaite and Penman–Monteith) and their application scenarios. Third, this study focused on the temporal and spatial evolution and periodic characteristics of droughts, without considering the driving mechanisms behind them and their impact on the ecosystem. In future, it will be necessary to focus on a sensitivity analysis of drought indices with regard to climate change. Finally, although this study calculated the SPEI using meteorological data provided by China’s high-density observatory network, deviations and uncertainties were inevitable in the point-to-grid spatialization process. This shortcoming may be avoided by using satellite remote sensing data with high spatiotemporal resolution in the future, which can allow pixel-scale monitoring and simulation of meteorological drought evolution. Practical implications Under the background of continuous global warming, the climate in arid and semiarid areas of China has shown a trend of warming and wetting. It means that the plant environment in this region is getting better. In the future, the project of afforestation and returning farmland to forest and grassland in this region can increase the planting proportion of water-loving tree species to obtain better ecological benefits. Meanwhile, this study found that in the relatively water-scarce regions of China, drought duration was dominated by interannual oscillations (3.1a and 7.3a). This suggests that governments and nongovernmental organizations in the region should pay attention to the short drought period in the ESAC when they carry out ecological restoration and protection projects such as the construction of forest reserves and high-quality farmland. Originality/value The findings enhance the understanding of the phasic and periodic characteristics of drought changes in the ESAC. Future studies on the stress effects of drought on crop yield may consider these effects to better reflect the agricultural response to meteorological drought and thus effectively improve the tolerance of agricultural activities to drought events.

ASSESSING YOUTH INVOLVEMENT IN AGRICULTURE IN YOLA-NORTH LOCAL GOVERNMENT AREA OF ADAMAWA STATE

The study examined youth involvement in agriculture in Yola-North Local Government Area of Adamawa State, Nigeria. Data were collected from 230 farmers using a well-structured questionnaire and analyzed using descriptive and inferential statistics. The results show that the most (52.61%) of respondents were male, with an average age of 21 years. Most respondents (55.22%) were single with an average household size of 4 persons. Educationally, 2.61% had primary education, 7.39% had secondary education, 52.61% had diploma, and 37.39% had HND/Degree, indicating that all the respondents were educated. Additionally, most respondents earned between N40,000 and N200,000 annually. Factors influencing youth participation in agriculture revealed that age and sex were positive and significant at 1% level (P&lt;0.01), while educational level was negative but significant at 10% level (P&lt;0.1). Constraints identified included lack of government assistance, insufficient capital, poor road access, inadequate feed supply, poor extension services, and poor marketing prices. Sex (male) and age were positively associated with youth participation in agriculture, whereas the lack of government support was a significant barrier preventing youth from engaging in agricultural activities. The study recommends that inputs such as agrochemicals and credit should be made available on time and at subsidized rates by both governmental and non-governmental organizations to make agriculture more appealing to youths. Furthermore, the government or relevant institutions should strictly monitor and supervise any development or empowerment initiatives to prevent mismanagement by involved dignitaries.

LAND GOVERNANCE; FACTS AND EFFECTS. CASE OF THE CITY OF TAHER (WILAYA OF JIJEL IN EASTERN ALGERIA)

All religious laws and man-made laws call for the preservation and sustainability of natural resources, including land as an irreplaceable element.Compliance of land use with the guidelines of development and town planning instruments is a basic principle in land use. This rule of good governance leads to the protection of the environment, natural resources and the preservation of the natural, cultural and socio-economic heritage marking a given territory. Aware of this reality, the Algerian state anticipated this problem early on through the promulgation of laws and regulations governing territorial management, the occupation of urban land and the protection of the environment within the framework of sustainable development.However, the divide between land allocations and its use on the scale of certain urban areas on the eastern outskirts of the city of Jijel gives food for thought on the reliability and feasibility of urban planning instruments in the control of land management. . This deficiency is manifested by the disorderly extension of the built environment, the consumption of natural, forest and agricultural space. This trend, accompanied by the increase in population, generates increasing needs for equipment and amenities and difficulties in the management of all types of waste produced.Taking the case of the city of Taher as a study framework, the decadence of heritage wealth (social way of life, agricultural activities, low population and construction density, hygiene and environmental balance) can increase on board be noticed in view of the areas withdrawn annually from natural landscapes and agriculture. In order to control urbanization and meet the needs for individual housing, the municipality of Taher has planned several subdivisions in accordance with the town planning plan. Despite the fact that the majority of designated land bases are of a public legal nature, these operations for individual residential use have been abandoned under the effect of constraints and disputes. As a result, the land areas in question are invaded by constructions which do not necessarily meet town planning standards and land use rules.