The production profile that emerged is unmistakably smallholder. Forty-one percent of the surveyed farmers cultivated half a hectare or less, 48 percent farmed between one and five hectares, and only 11 percent worked more than five hectares; not a single respondent fell in the narrow band between half a hectare and one hectare. Three-quarters of the farmers owned the land they cultivated, while a quarter rented. Liberica, the variety behind the Barako name, was reported by 49 percent of respondents, followed by Robusta at 30 percent, Excelsa at 19 percent, and a marginal 2 percent growing Arabica. Farming was overwhelmingly traditional or natural, reported by 91 percent, and processing was dominated by the dry method at 95 percent, with only 5 percent using wet processing.

Production volumes were modest across the board. Thirty-eight percent of farmers harvested less than 50 kilograms of coffee per year, 20 percent produced between 50 and 100 kilograms, 31 percent fell in the 101-to-500-kilogram range, and only 4 percent and 7 percent reached the 501-to-1,000-kilogram and above-1,000-kilogram categories respectively. Marketing was equally localized: 80 percent of farmers sold primarily to local markets, 18 percent sold through traders, and 2 percent kept their harvest for household consumption. Some respondents described less favorable terms when dealing with traders, particularly when coffee was sold soon after harvest or before drying and quality were complete. Because the study collected no transaction-level farmgate prices or price differentials, the researchers treat these statements as reported market experiences rather than verified price effects.

When farmers rated a list of constraints on a four-point agreement scale, one production concern rose above everything else: shrinkage of coffee plantations, with a weighted mean of 3.74, interpreted as Strongly Agree. In the market and profitability domain, the standout item was ineffective regulation and instability of market prices and coffee-cherry trading, rated at a weighted mean of 3.14, or Agree. Notably, the composite mean for that entire domain was only 1.76, in the Disagree range, which means the price-and-trading item stood out within the domain rather than reflecting uniformly high concern across all profitability questions. Competition from imported and instant coffee, for instance, was rated at just 2.29, and items on low demand or failure to maintain quality processing scored as low as 1.26.

Farm continuity emerged as the other cluster of strongly endorsed concerns. Non-participation of the young generation in farming received a weighted mean of 3.71, also in the Strongly Agree range, followed by the long duration before coffee can be harvested at 3.48 and delayed profit and returns at 3.36, both rated Agree. Lack of assistance for other coffee income-generating projects scored 3.00. Yet the financial-capacity items told a different story: lack of funds for sustaining coffee trees and soil health, and lack of capital for seed selection and growing, were both rated Disagree, at 1.93 and 1.88 respectively. The composite mean for the whole domain was 2.42. This pattern matters because it suggests the pressure farmers described concerned the timing of returns rather than an outright shortage of money.

The qualitative strand of the study, drawn from eight key-informant interviews and two focus groups of eight farmers each, produced four recurring themes. The first, shrinking farm area and continuity, confirmed the two most strongly endorsed survey items and expanded on them: participants attributed farm-area reductions to land conversion, the burden of maintenance, decisions to sell portions of agricultural land to meet immediate financial needs, and younger household members pursuing non-farm careers. The second theme, cash-flow-driven selling, described farmers selling dried or newly harvested coffee quickly for immediate cash and relying on intercropping or other activities while waiting for the next harvest. Neither strand, the researchers note, measured the actual extent or rate of farm-area change, and because the timing of sale and prices received were never recorded, the income consequences of early selling could not be assessed.

The third theme, processing and quality upgrading, revealed the study’s most interesting divergence. Farmers and industry participants alike described a need for improved drying, processing, and farming methods, and the leadership of the Samahan ng Magkakape farmer association emphasized the importance of processing quality in relation to pricing. The two industry owners confirmed this in their ratings, scoring inability to upgrade processing methods at 3.00 and inability to upgrade farming methods such as rejuvenation and clonal grafting at 2.50, both Agree. The farmer survey, however, was discordant: failure to maintain quality processing from harvest to finished product was rated Strongly Disagree at 1.26. The authors suggest this gap may reflect the difference between maintaining current quality and upgrading methods, or simply the different vantage points of producers and processors. Because quality grades and associated prices were never measured, the link between processing quality and price remains a participant perspective rather than an established relationship.

The fourth theme pointed toward stronger market coordination. Participants repeatedly linked their concerns about price setting and trading to the need for better farmer organization, market coordination, and public-sector support. The survey confirmed the salience of the concern while also sharpening its location: farmers did not report lacking knowledge of the factors affecting coffee prices, at 1.69, or of trading and marketing, at 2.12, both Disagree. That suggests their anxiety was directed at market-level price setting and coordination rather than at their own understanding. The two owners rated government regulation of coffee trading at 2.50, Agree, but did not rate price-risk mitigation as a business challenge, at 1.00. With only two owners, the researchers caution, no meaningful comparison with farmers is possible.

The study’s limitations are laid out with unusual candor. The population figure of roughly 200 to 250 farmers came from association membership records rather than a complete census, and some active coffee farmers in Lipa do not belong to organized groups. Purposive sampling, while useful for identifying information-rich participants in the absence of a full sampling frame, can introduce selection bias, so the results describe the surveyed stakeholders and cannot be generalized to all Lipa coffee producers. The industry-owner component rested on just two respondents. The surviving qualitative files lack a complete coding matrix, saturation record, and speaker-attributed verbatim transcripts, so no direct quotations were reconstructed, and the qualitative evidence is limited to paraphrased, group-attributed accounts. The questionnaire showed acceptable internal consistency with an overall Cronbach’s alpha of 0.87, but domain-specific coefficients were not reported.

What the study ultimately delivers is a prioritized map for future measurement rather than proof of economic harm. Because no inferential, causal, or econometric analyses were conducted, the findings cannot establish whether perceived price instability, trading conditions, delayed returns, or processing constraints actually affect farmer income or profitability, or whether perceptions differ systematically across farm-size, tenure, or marketing-channel groups. The authors propose locally testable steps instead of presumed solutions: the Lipa City Agriculture Office and farmer organizations could document and disseminate quality-specific farmgate prices and trading conditions, while public agencies, the university, farmer groups, and coffee enterprises could pilot farm rehabilitation, shared drying or processing facilities, and youth-oriented enterprise activities, measuring changes in quality, cost, price received, and producer margin before any scale-up. For a coffee tradition as culturally loaded as Barako, the message is that saving it will require not just sentiment but systematic data on what farmers actually receive at the farmgate.

Subject of Research: Perceived production, marketing, and continuity constraints among Kapeng Barako Liberica coffee farmers in Lipa City, Philippines

Article Title: Production characteristics, marketing channels, and stakeholder-perceived constraints in Lipa City's Kapeng Barako sector: a mixed-method descriptive study

Article References: Extra, S. S., Malaluan, N. E., Austria, L. A., & Lumbera, M. L. (2026). Production characteristics, marketing channels, and stakeholder-perceived constraints in Lipa City's Kapeng Barako sector: a mixed-method descriptive study. Frontiers in Environmental Economics, 5, Article 1957600. https://doi.org/10.3389/frevc.2026.1957600

Image Credits: AI Generated

DOI: 10.3389/frevc.2026.1957600

Keywords: Kapeng Barako, Liberica coffee, Lipa City, Philippines, smallholder farmers, mixed methods, coffee value chain, price instability, farm continuity, youth participation, dry processing, marketing channels

The study, conducted by a team at Universitas Jambi and published in Heliyon, set out to answer a provocative question: could the biochemical magic of civet coffee, the famously expensive brew produced when beans pass through the digestive tract of the Asian palm civet, be replicated in a sterile glass bottle without any animal involvement? Civet coffee owes its character partly to microbes living in the animal’s small intestine and cecum, where genera such as Lactobacillus and Leuconostoc help break down complex compounds in the bean. The Indonesian team reasoned that if those same bacterial players could be deployed deliberately, the result might be a consistent, scalable, and ethically uncontroversial alternative to the civet pipeline.

To test the idea, the researchers obtained grade A green Liberica beans grown by a peatland coffee producer in West Tanjung Jabung and inoculated one-kilogram batches in sealed dark glass bottles with starter cultures of Lactiplantibacillus plantarum and Leuconostoc mesenteroides, both supplied by Indonesia’s National Research and Innovation Agency. The two organisms were chosen for their complementary metabolisms. L. plantarum is homofermentative, converting sugars almost exclusively into lactic acid, while L. mesenteroides is heterofermentative, generating acetic acid, ethanol, and carbon dioxide alongside lactic acid. Beans were submerged in nutrient broth, fermented anaerobically for either 48 or 72 hours, shaken every 12 hours, then washed, sun-dried, and roasted at 200 degrees Celsius for three to five minutes. Six treatment combinations emerged: each bacterium alone at each duration, plus both together at each duration.

Throughout fermentation, the team tracked pH at 12-hour intervals and watched it fall steadily, a sign that the bacteria were metabolizing fermentable sugars in the coffee mucilage and accumulating organic acids. That acidification matters, because it shapes the chemical environment in which flavor precursors form. When the roasted beans were finally analyzed, the differences were striking. Total phenolic content rose from 42.271 milligrams of gallic acid equivalents per gram in the unfermented control to as high as 53.833 in beans fermented for 72 hours with the mixed culture, while antioxidant activity, measured by the DPPH assay, improved dramatically. The unfermented coffee needed 72.122 micrograms per milliliter to quench half of the free radicals in the test, whereas the best fermented samples required barely 3 to 5 micrograms, an order-of-magnitude gain in radical-scavenging power.

Not every biochemical change moved in the same direction. Total flavonoid content actually peaked in the shortest, single-culture treatment, reaching 12.946 milligrams of quercetin equivalents per gram after 48 hours with L. plantarum alone, then declined in longer and mixed fermentations. The authors attribute this to bacterial beta-glucosidase enzymes, which cleave flavonoid glycosides into simpler metabolites. Caffeine, meanwhile, told perhaps the most commercially intriguing story. The unfermented beans contained 0.858 micrograms per milliliter of caffeine, but levels fell progressively with fermentation time and microbial load, bottoming out at just 0.117 micrograms per milliliter in the 72-hour mixed-culture sample. Microbes are known to demethylate caffeine, a purine alkaloid, into intermediates such as paraxanthine and methylxanthines that they can then consume as carbon and nitrogen sources, and the study suggests a similar pathway may be at work here.

Chlorogenic acid, the polyphenol largely responsible for coffee’s acidity, bitterness, and antioxidant reputation, proved far more stubborn. Across all treatments its concentration hovered between roughly 3.67 and 3.73 micrograms per milliliter, with no statistically meaningful decline. The ester bonds linking caffeic and quinic acid in the chlorogenic acid molecule appear resistant to the mild conditions of this fermentation, meaning the process can strip out caffeine without sacrificing one of coffee’s most valued bioactive compounds, a combination that low-caffeine, high-antioxidant product developers may find hard to ignore.

Proximate analysis added further nuance. Moisture content rose in most fermented samples but stayed well within the 12.5 percent ceiling accepted by Indonesian, International Coffee Organization, and Specialty Coffee Association standards, so shelf stability was not compromised. Ash and lipid contents barely moved, indicating that minerals and fats survived the microbial onslaught largely intact. Protein content, however, shifted noticeably, spiking to 32.14 percent in the 48-hour mixed-culture sample, and carbohydrate content dropped in every fermented batch as the bacteria consumed glucose and sucrose for energy. That carbohydrate depletion is not a loss but a transformation: the sugars that once sat inert in the bean have been converted into organic acids and other metabolites that will later feed the Maillard reactions responsible for roasted coffee’s aroma.

The sensory verdict came from three certified panelists at the Indonesian Coffee and Cacao Research Institute, who cupped the samples blind under Specialty Coffee Association protocols, scoring ten attributes from fragrance to overall impression. Every fermented sample outperformed the control, and the mixed cultures dominated. The 72-hour co-fermentation earned perfect tens for sweetness, uniformity, and clean cup, and its final score of 87.57 placed it firmly in the excellent category reserved for scores between 80 and 90. Descriptors shifted from the control’s bright citrus, baked, and caramel notes toward berry, grape, nutty, peach, and juicy profiles in the mixed-culture beans, with the L. plantarum treatments leaning toward berries, malic acid, and sweet orange, and the L. mesenteroides treatments toward tamarind, lime, red apple, and mango.

The chemistry behind those flavors likely reflects microbial synergy. In mixed culture, the two lactic acid bacteria occupy complementary metabolic niches, each contributing distinct metabolites that shape acidity, sweetness, and aroma, while their combined activity suppresses undesirable microorganisms and sustains fermentation across different stages. Gas chromatography-mass spectrometry confirmed that lipid-derived esters dominated the solvent-extractable profile of all samples, with compounds such as glyceryl trilaurate and hexadecanoic acid esters persisting throughout, while fermentation-specific products like vinyl laurate and 2-lauro-1,3-didecoin appeared only in treated beans. The authors are careful to note that this solvent-based extraction captures extractable constituents rather than the full aroma-active fraction of brewed coffee, and that headspace techniques such as HS-SPME-GC-MS would be needed to fully map the volatile landscape.

The implications stretch well beyond a single Indonesian province. Liberica’s tolerance of degraded peat soils makes it a rare crop that can support farmer livelihoods in landscapes where Arabica and Robusta simply fail, giving it a potential role in both peatland conservation and climate adaptation. If a simple, food-safe bacterial starter can reliably lift its cup quality into specialty territory while simultaneously lowering caffeine and boosting antioxidant activity, the economics of an entire neglected coffee species could change. The researchers caution that their work examined only strain selection and duration, leaving fermentation kinetics, microbial community dynamics, and metabolite mechanisms for future study. But the core finding stands: two of the food industry’s most familiar bacteria, working together in a sealed bottle, can accomplish what was once thought to require a civet’s gut, and they can do it with precision, consistency, and a cupping score that would turn heads at any specialty coffee competition.

Subject of Research: Controlled lactic acid bacterial fermentation of Liberica coffee beans and its effects on sensory quality, antioxidant activity, and chemical composition

Article Title: Effect of fermentation on the quality of Liberica coffee ( Coffea liberica ) using Lactiplantibacillus plantarum and Leuconostoc mesenteroides bacteria: Sensory analysis, volatile compound, antioxidant, and proximate analysis

Article References: Tarigan, I. L., Ramadhan, I. I., Latief, M., Febrianto, N. A., & Sutrisno (2026). Effect of fermentation on the quality of Liberica coffee (Coffea liberica) using Lactiplantibacillus plantarum and Leuconostoc mesenteroides bacteria: Sensory analysis, volatile compound, antioxidant, and proximate analysis. Heliyon, 12(15), Article e45531. https://doi.org/10.1016/j.heliyon.2026.e45531

Image Credits: AI Generated

DOI: 10.1016/j.heliyon.2026.e45531

Keywords: Liberica coffee, coffee fermentation, lactic acid bacteria, Lactiplantibacillus plantarum, Leuconostoc mesenteroides, antioxidant activity, caffeine reduction, sensory analysis, SCA cupping, volatile compounds, peatland agriculture, Indonesia