Coffee Production Systems Research Articles

Evaluation of Herbicides Efficacy against Weeds in Coffee (<i>Coffea arabica </i>L.) at Jimma Southwest, Ethiopia

Weeds are one of the most serious causes of economic losses in agricultural production. As a result weed completions contributes 60 to 80% yield losses in coffee under Jimma condition. Currently, expensiveness of weed management has been a principle issue in economic analysis of coffee production particularly in large scale farm in Ethiopia. Hence, evaluation of systemic herbicide with different mode of action is essential to effectively control dangerous weeds in coffee production system. The study was conducted in Jimma Agricultural Research Center in 2021 cropping season at Jimma Agricultural Research Center on Station to evaluate the efficacy of newly introduced herbicides (Fascinate 280SL at 3.3l/h, Jimila 480% SL at 3.0l/h and Proper 360 SL at 3.0l/ha) against major weeds in coffee. Tested herbicides (Fascinate 280SL, Jimila 480% SL and Proper 360 SL) were effectively controlled the noxious weeds infested coffee experimental plots. These herbicides also showed significant effect on inhibiting weed density over standard check. The herbicide were effective in controlling weeds in coffee safe for crops if applied at active growth stage of weeds following the instructions on technical guide line of herbicides properly. Therefore, the herbicides were recommended used as management option against weeds in coffee with the application rate mentioned above

The influence of shade tree species and coffee varieties on selected soil physicochemical properties in coffee-based farming system of southwestern Ethiopia

Different shade tree species are used in various coffee production systems across the world. Outside the benefits of biodiversity protection, temperature protection, and carbon sequestration shade trees can influence soil nutrient states through litter inputs and nitrogen fixation. However, little information is available in coffee plantations whether shade tree species and type of coffee variety planted under shade tree have an influence on soil physical properties and nutrient status in coffee-based farming systems of southwestern Ethiopia. Hence, the study was carried out to investigate the effect of shade tree species and coffee varieties in coffee plantation on the physicochemical properties of the soil. The study was conducted in Chora Botor district (Chalalaki coffee plantation), located in Jimma Zone, Oromia regional states of Ethiopia. The study was superimposed on coffee farm that has been established using four released coffee varieties (7440,744, F59 and 75227) under three recommended coffee shade trees (Albizia gummifera, Millettia feruginea and Acacia abyssinica). Soil physical properties and nutrient status were investigated in response to shade tree species, coffee varieties and their combination. The results indicated that the physical and chemical properties of the soil vary across the shade trees and coffee variety grown. The effect of shade tree species on soil depends on the type of coffee varieties grown under the shade tree species, Albizia gummifera and Acacia abyssinica trees enhanced more soil nutrient content and water-holding capacity of the soil than Millttia ferrugnia. Total nitrogen, organic matter, available phosphorous, exchangeable potassium, Cations Exchange Capacity, and bulk density were higher underneath Albizia gummifera than other coffee shade tree species. On the other hand, moisture content, available P, exchangeable K and CEC were higher beneath Acacia abyssinica than other coffee shade tree species. Soil pH was negatively correlated with Millettia ferruginia. Use of Acacia abysinica and Albizia gummifera shade tree species with compatible coffee varieties could be a viable option to augment soil fertility management practices in the coffee production systems of the southwest Ethiopia.

Efficiency of inoculation methods for the assessment of bacterial halo blight in coffee seedlings

AbstractBacterial halo blight (BHB), caused by Pseudomonas coronafaciens pv. garcae (Pcg), is one of the most significant diseases affecting coffee trees worldwide, resulting in considerable damage and notable losses within coffee production systems. Further research into the epidemiology and aetiology of BHB in coffee plants is essential for developing effective management strategies. Understanding the efficiency of each inoculation methodology in inducing symptoms is crucial for advancing this research. Therefore, this study aimed to assess the efficiency of seven Pcg inoculation methods using five concentrations to enhance the highest BHB intensity. The experimental design was a complete randomized block design in a factorial (7 × 5) variance analysis with four replications. The first three pairs of leaves of coffee seedlings of the cultivar Catuaí Vermelho IAC‐99 were inoculated and evaluated for the incidence and severity of BHB. The inoculation methods of Pcg by injury provided higher BHB AUDPCI and AUDPCS values. Among these, the inoculum injection and multi‐needle wounding at inoculum concentrations of 1.6 × 109 CFU mL−1 demonstrated higher disease intensity.

Developing Coffee Cherry Skin and Coffee Husk by Products as Sustainable Novel Food and Fuel

Coffee plantations can potentially support an integrated sustainable coffee production (SCP) system, particularly through the expanded utilization of by-products. Smallholders mostly manage coffee plantations in Indonesia. Coffee processing cannot avoid waste entirely. However, poor processing will increase waste. This research aims to utilize by-products (coffee skin) to create novel food (cascara) and potential fuel. The raw materials from Cherry skin (CS) and Husk skin (HS) are obtained from wet and dry coffee processes. This research conducts the process of sorting raw cascara and roasting it. TDS and pH are examined to measure the level of extraction, while a group of panelists assess the aroma, taste, and mouthfeel using a series of scaling points for justification. CS does not require sorting. However, HS is sorted into three sizes: 7.5mm, 6.5mm, and 5.5mm, respectively. In this study, 1,000g HS has an approximate size distribution of about 25% 7.5 mm, 15% 6.5 mm, and 20% 5.5 mm; the rest is dust and green beans (GB) coffee pixels. In conclusion, CS and HS were roasted to produce food products (cascara). About 2.5kg of raw HS is needed for 1kg feed HS (7.5mm and 6.5mm). HS measuring 5.5mm or below, and the remaining fraction of dust makes up about 54% of the raw feed and can be used as fuel (briquettes).

Emergy accounting of coffee husks for the generation of energy

Coffee husks are an abundant and underutilized waste product from the Brazilian agro-industry. The present study employs the emergy methodology to investigate the potential of utilizing coffee husks as a co-product for efficient energy generation. Emergy Accounting key findings indicate high transformity and specific emergy values, endorsing their substantial energy potential. Emergy accounting evaluate indices such as emergy economic efficiency (EYR), environmental loading ratio (ELR), and environmental sustainability index (ESI). Results indicate that the system operates with an EYR of 1.19, demonstrating that the energy output exceeds the invested energy, while the ELR of 6.42 suggests a moderate environmental impact and low ESI of 0.19 underscores the need for more sustainable practices in the coffee production system. Despite environmental impacts, the system yields net energy with 103% higher ecosystem efficiency. Coffee husks, compared to sugarcane straw and bagasse, boast advantageous traits—favorable ash content, optimal particle size, and low moisture, thereby reducing the need for energy-intensive processing. These results support investment in the husks' combustion process, akin to sugarcane bagasse, reducing reliance on non-renewable sources in the thermoelectric system. This study underscores coffee husks as a promising alternative energy source, repurposing an abundant agro-industrial waste.

Coverage plants in coffee production systems as weed control

Coverage plants in coffee production systems as weed control

Shade versus intensification: Trade-off or synergy for profitability in coffee agroforestry systems?

CONTEXTCoffee agroforestry systems (shaded coffee) are considered less productive but more resilient than more intensive production systems. A persistent challenge for coffee farmers is the extreme fluctuations in coffee prices, leading to a loss of profitability and lower investment in production. There are contrasting conclusions regarding the profitability trade-off between increasing productivity through intensification and the sustainability benefits of shade tree coffee agroforestry systems. OBJECTIVEUsing a typology of different intensification and sustainability coffee production strategies in Costa Rica and Guatemala, we assess the economic feasibility and sensitivity of those strategies under likely future scenarios of price and cost variability. METHODSBased on on-farm survey data from a large-scale survey of farmers with information on costs, prices and yields over ten years, a probabilistic cash flow analysis was used to create a stochastic model for net returns. RESULTS AND CONCLUSIONSUnder future price scenarios, the Net Present Value (NPV) for coffee production was greatest for the high-productivity farms with high investment and moderate shade levels. The NPV of low-investment farms was greater (and positive) for highly shaded coffee production than for low shade coffee production (which, on average, had a negative NPV), despite the two having similar levels of investment. Diversification with bananas or avocados in association with coffee only improved NPV for high-value export avocado. Despite the substantially higher production costs for the high productivity systems, they generally maintained higher probabilities of achieving a positive net cash income or achieving a living income under most labour, fertilizer or coffee price scenarios, except a 50% fall in coffee prices. Diversification effects were as sensitive to changes in labour and input costs but in most cases reduced the probability of a more pronounced negative net cash income under low coffee price scenarios. We find an increase in coffee prices by 50% was needed to enable all farmers to achieve a positive net cash income; with an increased probability of achieving returns comparable with a living wage for higher productivity systems. SIGNIFICANCEWe conclude that high-investment, high-productivity coffee production systems are compatible with shade-grown production; more likely to lead to economic success and achieve positive returns under most conditions, except large falls in coffee prices. For farmers with limited capacity to invest, high-shade production systems provide a positive cash return under a broader range of price conditions than low-shade systems.

Ammonia volatization from conventional and stabilized fertilizers, agronomic aspects and microbiological attributes in a Brazilian coffee crop system.

We aimed to quantify the N losses through volatilization of the main conventional and stabilized N fertilizers applied in coffee plantations. Additionally, we also assessed microbiological attributes of the soil (microbial biomass carbon (MBC); microbial biomass nitrogen (MBN); microbial basal respiration (MBR); metabolic quotient (qCO2); urease, β-glucosidase, acid phosphatase, and arylsulfatase activities) and agronomic aspects of the crop (N content in the leaves and beans, yield, and N exportation by the beans). Treatments consisted of the combination of three fertilizers (ammonium nitrate - AN, conventional urea - U, and urea with N- (n-butyl) thiophosphoric triamide (NBPT) - UNBPT, and five doses of N (0, 150, 275, 400, and 525kg ha-1 year-1 of N), with four replicates, totalling 60 experimental plots. In the two crop seasons evaluated, daily and cumulative losses of N-NH3 from the split fertilizer applications were influenced by the N fertilizer technologies. The application of U resulted in losses of 22.0% and 22.8% for the doses of 150 and 400kg ha-1 year-1 of N. This means that 66 and 182kg ha-1 of N-NH3 were lost, respectively, at the end of six fertilizations with U. UNBPT reduced urease activity and N-NH3 losses compared to conventional urea, avoiding the volatilization of 15.9 and 24.3kg ha-1 of N. As for AN, N-NH3 losses did not exceed 1% of the applied dose, regardless of the weather conditions during the fertilization. Urease activity was higher on days of maximum NH3 volatilization. There was an effect of the N sources (NS), soil sampling time (ST), and their interaction (NS × ST) on the MBN and arylsulfatase activity. The N sources also influenced the MBC and the qCO2. A substantial amount of N was removed from the system by the beans and husks of the harvested fruits. Our study showed that N fertilizer technologies are interesting options to reduce N-NH3 losses by volatilization, increase N retention in the soil, and improve microbiological attributes and the sustainability of coffee production systems.

Analysis of Supply Chain Management Performance in the Community Coffee Production System in Bajawa, Ngada Regency

Research on Supply Flow Performance Management in the Bajawa People's Coffee Production System was carried out in Ngada Regency, with the aim of finding out the relationship between cooperation and the performance of the Bajawa coffee supply flow, knowing the relationship between information sharing and the supply flow performance of Bajawa coffee and knowing the long-term relationship with Bajawa coffee supply flow performance. Many factors can influence the performance of supply flow management in companies, including information sharing, long term relationships, and cooperation. The method used in this research is to analyze the relationship between the dependent variable (cooperation, information sharing and long-term relationships) and the independent variable (Bajawa coffee supply flow performance). From the results of the multiple linear regression analysis carried out, it shows that: the long-term relationship variable has the greatest influence on the Bajawa coffee SCM performance variable (dependent) with a coefficient value of (0.047), then the cooperation variable with a value of ( 0.019 ), and which has a The smallest influence is the information sharing variable (0.018). This means that the three independent variables have a positive and significant effect on the dependent variable.

COFFEE PRODUCTION AND ITS CONTRIBUTION TO SUSTAINABLE DEVELOPMENT IN MALAYSIA

Coffee planters face competition with other cash crops and higher production costs. Besides that, the biggest issue in this sector is the labour required to select ripe coffee beans since not all beans in a single stalk of coffee mature simultaneously. Nonetheless, this well-known beverage is facing a sustainability dilemma. This paper uses previous studies on coffee production and sustainability in Malaysia. A continuous drop in global coffee prices has squeezed coffee growers and pushed many of them below the worldwide severe poverty level. This document discusses research on sustainability in the coffee industry, including past study findings, and makes various recommendations. These obstacles must be solved to achieve sustainable coffee production. All types of literature (including grey literature) were searched exploratively by including those published in the past ten years from 2011 to January 2022 and in the English language. The adoption of sustainable production practices is vital for ecosystem and biodiversity protection, as well as assuring long-term supply availability of coffee production in Malaysia. Implementing sustainability in the coffee certificate in Malaysia's coffee production system appears to be the most appropriate approach to addressing these challenges because it can synergise increasing productivity and farmers' income, implementing climate change adaptation and mitigation, and increasing farmer capability and credit access. The originality of this study is its reviews of how to sustain the coffee production in the Malaysian agriculture sector.

Genetic diversity and structure of the coffee leaf rust fungus Hemileia vastatrix across different coffee management systems in Ethiopia.

Although coffee leaf rust (CLR), caused by Hemileia vastatrix, poses an increasing threat to coffee production in Ethiopia, little is known regarding its genetic diversity and structure and how these are affected by coffee management. Here, we used genetic fingerprinting based on sequence-related amplified polymorphism (SRAP) markers to genotype H. vastatrix samples from different coffee shrubs, across 40 sites, covering four coffee production systems (forest coffee, semi plantation coffee, home garden coffee, and plantation coffee) and different altitudes in Ethiopia. In total, 96 H. vastatrix samples were successfully genotyped with three primer combinations, producing a total of 79 scorable bands. We found 35.44% of amplified bands to be polymorphic, and the polymorphic information content (PIC) was 0.45, suggesting high genetic diversity among our CLR isolates. We also found significant isolation-by-distance across the samples investigated and detected significant differences in fungal genetic composition among plantation coffee and home garden coffee and a marginally significant difference among plantation coffee and forest coffee. Furthermore, we found a significant effect of altitude on CLR genetic composition in the forest coffee and plantation systems. Our results suggest that both spore dispersal and different selection pressures in the different coffee management systems are likely responsible for the observed high genetic diversity and genetic structure of CLR isolates in Ethiopia. When selecting Ethiopian coffee genotypes for crop improvement, it is important that these genotypes carry some resistance against CLR. Because our study shows large variation in genetic composition across relatively short geographical distances, a broad selection of rust isolates must be used for coffee resistance screening.

Comparative toxicity of coffee insecticides to the green lacewing Chrysoperla externa in laboratory and persistence trials

The green lacewing Chrysoperla externa (Hagen) (Neuroptera: Chrysopidae) is a generalist predator with a diet including major coffee pests. Aiming at a harmonious integration of biological and chemical control in coffee production systems, ecotoxicology studies are required to provide information on insecticide harmfulness toward natural enemies. We investigated the side effects of five coffee insecticides sprayed on eggs and third-instar larvae (L3) of C. externa. The assessed endpoints included C. externa viability (egg hatchability and L3 survival), developmental time, cycle completion, and body weight, sex ratio (female proportion) and accumulated oviposition of adults derived from the treated stages. Cyantraniliprole reduced viability of treated eggs, whereas abamectin prolonged the developmental time and reduced the oviposition of adults reared from the treated L3. In the F1 generation from treated L3, abamectin diminished egg viability and cycle completion and interfered with sex ratio and adult weight. Apart from these results, metaflumizone caused the most striking effects on C. externa by producing high L3 mortality (96%). The hazardousness of this compound, however, was dismissed in persistence bioassays (L3 exposure to aged residues in coffee leaves), indicating that metaflumizone requires direct spraying to kill C. externa. These findings allow us to conclude that while the other compounds (abamectin, abamectin + chlorantraniliprole, chlorantraniliprole and cyantraniliprole) are intrinsically safer for C. externa, metaflumizone applications should be performed in periods of low C. externa activity in plants to avoid direct predator exposure.

Coffee Management Intensification Has Changed the Tradition of Coffee Forest Use in Southwest Ethiopia

The coffee production system has changed the notion of a forest common resources pool in southwest Ethiopia. It is weakening the customary right on forest through time. The objective of the study was to explore forest resources use in relation to coffee management intensity in southwest Ethiopia. The effect of coffee management intensification was narrated based on the nature of accessing forest resources, local control system, level of forest dependency, and nontimber forest products usage through time. Qualitative data were collected through an interview and walk-in-the-woods. It is worth mentioning that an age-old customary right is devolved, and a modified forest management arrangement is emerging along with the coffee production system. The result showed that coffee agroforest drives the use of forest resources in southwest Ethiopia. Coffee production is replacing the tradition of forest management for nontimber forest products. Collection of nontimber forest products is overwhelmed with coffee harvesting. Honey production area (i.e., Luggoo) has been changed to coffee plot. Only coffee owners hold the right to access coffee agroforest. Individual decisions are bypassing the social arrangement of forest resources usage. The nature and level of forest dependency have been changed along with the intensification of coffee management. In contrary to what most people believe, the study findings showed that better-off households are more forest dependent compared to poor households due to coffee production. The storyline depicts the need for taking into account coffee agroforest in sustainable forest management. The study suggests to revisit the notion of recognizing traditional forest resource usage brings sustainable forest management.

The coffee-mango association promotes favorable soil conditions for better-nourished and higher-yielding plants

In several countries, coffee is traditionally grown under the shade of large trees; however, the non-shade surface system has increased. Shade cultivation system benefits the soil, helps crops adaption to climate change, and reduces vulnerability. This study aimed to compare the physical, chemical, and biological soil features under coffee production systems: coffee-mango, coffee-banana, and full-sun coffee; to identify the nutritional variation of coffee plants in the three cultivation systems, and to establish recommendations for coffee production associated with other crops. Soil properties varied between the shaded and full-sun systems. The shade coffee systems had different pH, cation exchange capacity, potassium, and nitrogen concentrations, organic matter, carbon-, nitrogen-microbial biomass, and the number of earthworms from the full-sun coffee system. The coffee-mango association showed specific soil (exchangeable calcium, moisture, soil porosity, and aggregate stability index), foliar (calcium, potassium, nitrogen, iron, and chlorophyll a and b concentrations), and grain features (gold coffee yield, potassium, magnesium, and phosphorous concentrations) that make distinct from the other two coffee systems. The coffee-mango system positively influenced soil traits, nutrient concentration in leaves, production, yield, and nutritional status of the fruit. The production of coffee under full-sun adversely affects the soil and the coffee’s nutrition and yield. Therefore, the production of coffee should be in the traditional manner under shade trees. These results apply to coffee production under shade systems in other countries with similar agroecological conditions and to soil conservation as a pertinent vision under global climate change.

Nitrous oxide and methane emissions from coffee agroforestry systems with different intensities of canopy closure

Agroforestry-based coffee production systems (AFs) contribute to climate change mitigation through carbon sequestration. However, it is unclear whether AFs produce lower nitrous oxide (N2O) and methane (CH4) emissions than the open-shade coffee production system. In addition, little to no evidence is available to explain the relationship between canopy cover levels and greenhouse gas (GHG) emissions in AFs. The aim of this study was to investigate N2O, CH4 and yield-scaled emissions in AFs with differing shade-tree canopy levels. Three canopy cover levels were identified: (i) dense shade (80 % canopy closure), (ii) medium shade (49 % canopy closure), and (iii) open-shade (full sun) production. To determine the effect of canopy cover on GHG emissions under varying soil fertility management practices, three soil fertilization strategies were included: (i) mineral fertilizer, (ii) compost, and (iii) control (i.e., without soil amendment). The results showed that N2O emissions were two-to-three times greater when there was dense canopy cover than from open-shade production. The effect of canopy cover on N2O emission was more pronounced under the mineral fertilizer treatment. CH4 emissions were 44–64 % greater under the open-shade production system than under AFs. The yield-scaled global warming potential of 1 kg of fresh coffee cherries was 0.72 kg CO2eq for open-shade production, 0.58 kg CO2eq for medium canopy cover and 0.52 kg CO2eq for dense canopy cover. This study provides the first evidence of the importance of considering canopy cover intensity when determining the spatial-temporal variations in GHG emissions from agroforestry systems.

Socioeconomic Factors Influencing Uptake of Coffee Production Recommended Practices in Kichwamba and Kirugu Sub-Counties Rubirizi District, Uganda

The study was on socioeconomic factors influencing the uptake of coffee production recommended practices in the Kichwamba and Kirugu Sub-counties of the Rubirizi district and was conducted in February 2021. Objectives were to identify the coffee production systems and practices used, identify the socioeconomic challenges associated with the uptake of recommended practices for coffee production, and identify the policy interventions to address the challenges associated with the use of recommended coffee practices. Farmers continue to register low coffee yields hence affecting their livelihoods and incomes and achieving maximum coffee production requires that farmers apply recommended practices since the quantity and quality of the crop rely on the practices used. A cross-sectional survey was conducted using simple random sampling and a total of 376 coffee farmers were sampled. Results indicated that Arabica coffee commonly grown has two major systems intercropping and mono-cropping. The coffee-recommended practices used were weeds control (23.7%), shading (21.5%), pruning (15.5%), fertiliser application (14.1%), pest and disease management (12.2%), water drainage management (6.6%), transplanting (4.0%), and seedbed preparation (2.7%). Statistically significant socioeconomic factors affecting the uptake of recommended practices for coffee were age [p=0.014], education level [p=0.002], labour [p=0.005], Farm size [p=0.001], farming experience [p=0.031], gender [p=0.031], land slope [p=0.048], un-accessibility to credit services [p=0.032], and plot ownership [p=0.049]. Policy interventions were farmer capacity building (35.1%), strengthening agricultural extension (23.7%), credit extension to the farmers (15.7%), re-visiting land reform policies (13.6%), and group formation (11.9%). The study concluded that coffee in the study area was grown under two production systems; intercropping and mono-cropping; the major coffee recommended practices used were; seedbed management, transplanting, pruning, shading, fertiliser application, weeds control, pest and disease management, and water drainage management. Socioeconomic factors like Education level, shortage of labour, farm size, experience in farming, gender, the slope of the land, un-accessibility of credit services, farmer age and plot ownership type were significant socioeconomic factors affecting uptake of recommended practices. Suggested policy interventions were re-visiting land reform policies, credit extension, capacity building, strengthening agricultural extension, and farmer group formation. More education and training for farmers, revisiting land policies, groups, associations and cooperative formation, and credit services extension are recommended.

Cost and Profitability Analysis of Producing Specialty Coffee in El Salvador and Honduras

In Honduras and El Salvador, coffee (Coffea arabica) is one of the leading agricultural exports, and the share of specialty coffee is growing each year. However, despite the importance of specialty coffee production and exports, there is a knowledge gap regarding its cost structure and profitability, particularly those associated with labor costs. The specific objectives of the study were to determine the cost structure of specialty coffee in Honduras and El Salvador and to estimate the costs and profitability of producing specialty coffee in these countries. A semi-structured survey instrument was administered to 14 farmers in Honduras and El Salvador selected as a convenience sample to represent different farm sizes, regions, and specialty-conventional and organic production systems. Specialty-conventional refers to high-quality coffee with or without certifications. Then,cost-profitability models were developed using an economic cost approach, which considered cash, noncash cost, and the opportunity costs of inputs. The results showed that although both countries are neighbors and economically and culturally similar, the cost structure of producing specialty coffee differed significantly. Costs were lower and profits were higher in Honduras than in El Salvador, and the specialty-conventional coffee production system was more profitable than the organic production system.

Effects of shade tree species on soil biogeochemistry and coffee bean quality in plantation coffee

Shade trees are used in many coffee production systems across the globe. Beyond the benefits on biodiversity conservation, climate buffering, carbon sequestration and pathogen regulation, shade trees can impact the soil nutrient status via, for instance, litter inputs and nitrogen fixation. Since soil nutrients affect coffee quality and taste, there is also a potential indirect effect of shade tree species on coffee quality. Yet, in spite of the potentially large impact of shade tree species, quantitative data on the effects of shade trees on (i) soil biogeochemistry and (ii) the associated coffee bean quality remain scarce. To what extent four widely used shade trees species (Acacia abyssinica L., Albizia gummifera L., Cordia africana L. and Croton macrostachyus L.) in a plantation coffee agroforestry system impact soil biogeochemistry, and how this in turn affects coffee quality, measured as cupping scores and bean size. A significant negative impact of N-fixing shade tree species on soil pH and base cation concentrations was found. Plant-available and total phosphorus was enhanced by the presence of Albizia gummifera L. Thus, the present findings demonstrate that careful selection and integration of shade tree species such as Acacia abyssinica L. and Albizia gummifera L. into coffee production systems is a good practice for sustaining soil chemical properties in coffee agroecosystem. Despite the impacts on soil chemical characteristics, the shade tree species had no effect on coffee cup quality but did affect the bean mass. In this particular study, an attempt was made to quantify the impacts of widely used shade tree species on soil biogeochemistry and the subsequent effect on coffee bean quality in a plantation agroforestry system over the course of one season in southwest Ethiopia. However, it might be feasible to accommodate both relatively sparse time-series experimental data consisting of coffee farms from plantations and smallholders, which needs to be the goal of future research to accurately examine the impacts on the outcome variables.

Exploring the cooling effect of shading for climate change adaptation in coffee areas

Rising air temperatures are the main reason for the expected reduction in land suitability for coffee cultivation under climate change in Central America. One of the reasons farmers use shade trees is to create a cooler microclimate in coffee plantations located in warming areas; therefore, adjusting the shade levels could alleviate future high temperatures. Even though data on expected climatic changes are available, no studies have addressed the cooling potential of shading in coffee production systems. In this study, we use regional climate information (RCP 4.5) and a simple shade model to explore the potential of shading as an adaptation practice in the coffee areas in Central America. A model was developed to estimate the required shade levels for Coffea arabica L. based on mean air temperature. Modeled and observed shade data were compared. Results indicate that compared to 2000, an overall increment of 23 ± 18% of shading would be required to alleviate the warming conditions by 2050. The shading will be more beneficial to coffee areas at medium and high altitudes than to areas at low ones. Also, the number of coffee areas that require dense shade levels (shading > 60%) may double by 2050. This would lead to a boost in tree biomass (carbon content) but also increase the competition for the coffee plants and consequently affect coffee yields. Trade-offs between adaptation, mitigation, and productivity objectives are expected in the coffee areas in the future.

Climate vulnerability of coffee-cocoa agrosystems in the sub-humid mountain ecosystems in south-west Togo (West Africa)

Changes in climate patterns are the main challenges being faced by the coffee and cocoa production systems, one of the key sources of livelihood for farmers in Togo’s humid dense forests zone, also known as “Togo ecological zone IV”. The objective of this study was to analyze the climatic vulnerability of coffee-cocoa agroforestry systems (CCAFS) in Togo ecological zone IV both ongoing (last 40 years 1980–2019) and the incoming decades (by 2050) considering climate forecast under AR6 socioeconomic pathways. The Standardized Precipitation Index (SPI) approach with the Mann–Kendall & Sen’s tests and the MaxEnt tool were used to assess the drought condition and the potential impacts on CCAFS suitability in the study area. The results show instability in rainfall series with a non-significant progressive trend in the area during the past four decades, while a significant increase in temperature was observed. Beyond 2050, suitable areas for coffee and cocoa species will drift to the pic mountainous part. Thus, respectively 51.91 and 54.50% of currently suitable areas for the two species, will be lost under the future climate scenario SSP3-7.0 and SSP5-8.5. These losses are mainly due to the reduction of precipitation of the driest month (Bio14), precipitation of the driest quarter (Bio17), and precipitation of the coldest quarter (Bio19) of the year. Drought is therefore revealed as the main limiting climatic factor for coffee and cocoa in Togo. The increasing drought intensity in the future is a source of high vulnerability of CCAFS as well as the local farmers’ livelihoods.