The research draws on cross-sectional data from 385 farming households and 726 individual plots, spanning lowland, midland, and highland watersheds in one of Ethiopia’s most agriculturally critical regions. The Upper Blue Nile Basin feeds the reservoirs of major hydropower dams and sustains millions of smallholder families whose plots grow smaller and steeper with each generation. Land degradation there is not an abstract environmental concern; it is a direct threat to food security and rural incomes. Alemu focused on four practices that dominate Ethiopia’s conservation landscape: simple soil bunds, soil bunds reinforced with grass, stone bunds, and stone-faced soil bunds, each representing a different balance of labor, materials, and expected returns.

Methodologically, the study goes beyond the simple before-and-after yield comparisons that have characterized much of the earlier literature. Alemu evaluated economic profitability using gross margin analysis and full cost-benefit analysis, computing the net present value and internal rate of return for each practice over a 20-year planning horizon with a 10 percent discount rate. This long time frame matters because conservation investments typically impose their heaviest costs up front, during construction, while their benefits, in the form of reduced soil loss and improved crop productivity, accumulate slowly over many seasons. Discounting future benefits at 10 percent reflects the reality that poor farmers value a birr today far more than a birr a decade from now, and it places a heavy analytical burden on practices whose payoffs are delayed.

The results reveal striking spatial variation. In the lowland watershed, simple soil bunds and stone bunds emerged as the relatively more economically beneficial options, delivering returns that justified their establishment and maintenance costs over the investment period. In the midland and highland watersheds, however, the picture changed: soil bunds combined with grass proved the most profitable choice. The grass component, which stabilizes the bund face, suppresses runoff, and provides valuable fodder for livestock, appears to tip the economic balance in wetter, cooler environments where biomass production is strong. This agroecology-specific pattern is the study’s central practical insight, suggesting that blanket national recommendations for conservation structures may be systematically misallocating scarce rural labor and public funds.

Perhaps the most consequential finding concerns what did not work. Stone bunds in the midland watershed failed the economic test entirely. Their relatively high establishment and labor costs, hauling and stacking stone is among the most labor-intensive forms of conservation construction, were not sufficiently compensated by the expected increases in crop productivity over the 20-year horizon. In other words, farmers and campaign workers who invest days of heavy labor building stone terraces in that agroecology are, on purely financial grounds, pouring effort into a structure that will never repay them. The result does not deny that stone bunds reduce erosion; it simply shows that erosion control alone, valued only through crop yields, can be an unprofitable proposition in certain settings.

Equally important is the study’s sensitivity analysis, which probes how fragile the profitability verdicts are to changes in underlying assumptions. The results proved highly sensitive to the discount rate, to crop productivity levels, and to investment costs. Small shifts in any of these parameters could flip a practice from profitable to unviable or vice versa. This finding carries a warning for the entire field of conservation economics: differences in assumptions can substantially influence the outcome of cost-benefit assessments, meaning that two credible analysts applying the same methods to the same practices may reach opposite conclusions depending on how they set their discount rates or estimate yield gains. Transparency about assumptions, the study implies, is not an academic nicety but a prerequisite for sound policy.

The broader context amplifies the stakes. Previous research in the Ethiopian highlands has documented severe soil loss rates on cultivated slopes, and national restoration initiatives have mobilized millions of workers through campaign-based watershed management programs. Earlier studies have shown that soil and water conservation measures can reduce runoff and nutrient loss and improve soil properties, and that large-scale restoration has improved drought resilience in degraded watersheds. But adoption by farmers has often lagged, and one recurring explanation is economic: when structures consume labor that could otherwise be spent on weeding, herding, or wage work, and when the yield response is slow or modest, the private calculus turns negative. Alemu’s study quantifies exactly that tension, practice by practice and watershed by watershed.

The policy implications are threefold. First, sustainable land management interventions should be targeted at agroecology rather than rolled out uniformly; the same structure that pays in the lowlands may lose money in the midlands. Second, policy instruments that lower the costs of establishment and maintenance, whether through tool banks, organized labor sharing, or subsidies for the most labor-intensive phases, could tip marginal practices into profitability. Third, agricultural intensification efforts aimed at raising land productivity would increase the financial feasibility of conservation measures, because higher baseline yields mean that any percentage gain from reduced erosion translates into larger absolute returns. In effect, the study argues that conservation and productivity investment must move together, not as alternatives.

For the international community watching Ethiopia’s restoration ambitions, the message is both cautionary and encouraging. Cautionary, because the era of assuming that every terrace is a win-win investment is over; the numbers demand agroecology-specific design and honest accounting of labor costs. Encouraging, because the analysis identifies concrete conditions under which conservation pays: grass-reinforced bunds in the mid and high altitudes, simple and stone structures in the lowlands, and any practice supported by cost-reducing policy instruments. As climate change intensifies rainfall variability across the Nile headwaters, the difference between profitable and unprofitable conservation may determine whether Ethiopia’s farmers can afford to keep their soil on their fields, and whether the Blue Nile keeps carrying it away.

Subject of Research: Economic profitability of sustainable land management practices in the Upper Blue Nile Basin, Ethiopia

Article Title: Profitability of sustainable land management practices in the Upper Blue Nile Basin, Ethiopia

Article References: Alemu, G. T. (2026). Profitability of sustainable land management practices in the Upper Blue Nile Basin, Ethiopia. SN Social Sciences, 6(10), Article 528. https://doi.org/10.1007/s43545-026-01844-4

Image Credits: AI Generated

DOI: 10.1007/s43545-026-01844-4

Keywords: sustainable land management, soil bunds, stone bunds, cost-benefit analysis, soil erosion, Ethiopia, Upper Blue Nile Basin, agroecology, smallholder farming, net present value, land degradation, soil and water conservation

The findings arrive against a sobering backdrop. Ethiopia loses an estimated two billion tons of soil every year to erosion, roughly half of it from cultivated land, and the country’s average annual soil loss of about 30 tons per hectare far outpaces the estimated soil formation rate of 10 tons per hectare per year. In the Lake Hawassa watershed specifically, previous research has measured losses of around 37 tons per hectare per year, feeding silt into a lake whose water quality and ecosystem have visibly declined. More than half of the land in sub-Saharan Africa is considered too degraded or infertile for reliable crop production, and Ethiopia’s highlands, where most of the population and livestock are concentrated, sit at the epicenter of the crisis.

Ethiopia has responded with one of the longest-running conservation programs in Africa. Institutionalized soil and water conservation began about half a century ago, initially delivered through food-for-work schemes in the 1970s and 1980s that paid grain to farmers in drought-prone areas for building soil bunds and Fanya juu terraces. These structures are technically simple: a channel roughly 50 centimeters deep and wide is dug along the contour, with excavated soil piled downslope to form a bund, or upslope in the case of Fanya juu, creating a barrier that intercepts runoff. Yet early experience showed that technology introduced through incentives struggled to survive once the payments stopped, because participation was tied to the reward rather than to conviction. In recent decades, nationwide mass-mobilization campaigns, sustainable land management programs, the Productive Safety Net Programme, and non-governmental organizations have pushed conservation onto farmland at remarkable scale.

In the three study districts, known locally as kebeles, that scale is measurable: the district agriculture office reported that 1,138 kilometers of soil bunds and 389 kilometers of Fanya juu were constructed between 2018 and 2025 through various schemes. The researchers classified households as adopters, whose structures remained functional over five years; dis-adopters, whose bunds had been dismantled, overtaken by sediment, or allowed to collapse; and non-adopters, with no structures built in at least five years. Of the adopters, about 72 percent said the measures on their land were built through public campaigns, coordinated by local government and relying on free communal labor for roughly 30 days each year, while fewer than 9 percent attributed construction to paid projects. Nearly three-quarters of adopters had invested their own or their family’s labor in the construction, a factor the authors link to stronger stewardship of the finished structures.

The survey results expose a sharp divide in how farmers perceive the problem itself. About 82 percent of all respondents had observed soil erosion on their farmland in the past decade, describing rills cutting through maize fields, exposed plant roots, thinning topsoil, and shrinking harvests. More than 65 percent of adopters strongly agreed that erosion reduces soil fertility, soil depth, and crop yield. But among dis-adopters, nearly half strongly disagreed with those statements, a blind spot the researchers suggest may partly explain why they abandoned the structures. Erosion in its least visible form, sheet flow that peels away soil more or less evenly, is easy to underestimate, and farmers on flatter land were the least likely to perceive any threat at all: 74 percent of non-adopters rated erosion on their fields as negligible to slight, against only 8 percent of adopters.

When the researchers ran a multinomial logistic regression on the socioeconomic variables, three factors emerged as statistically significant drivers of adoption. Each additional hectare of farmland nearly tripled the odds of adoption, with an odds ratio of 2.93, an effect the authors attribute to the fact that bunds occupy between 2 and 20 percent of cultivable area depending on slope, a painful sacrifice for farmers with tiny plots. Livestock holdings, measured in tropical livestock units as a proxy for household wealth, also raised the odds of adoption significantly. Most striking was perceived erosion severity, which multiplied the odds of adoption by 3.48. Farmers who see the damage are the ones who keep the barriers standing. By contrast, education, land certificates, credit access, off-farm income, and even participation in conservation training had no significant effect, likely because public campaigns and project labor delivered structures to households regardless of these characteristics.

Dis-adoption told its own statistical story. The probability of abandoning conservation structures rose with the age of the household head, increasing by roughly 9 percent per year of age, an effect consistent with the physical demands of maintenance. Bunds require continuous repair: sediment accumulates, runoff breaches the risers, and cultivation too close to the structure causes collapse. Larger families, greater livestock holdings, and stronger perception of erosion all significantly reduced the likelihood of dis-adoption, pointing to labor availability and economic capacity as the decisive resources. Where family labor is scarce or diverted to other farming tasks, smallholders cannot afford the upkeep, and the structures decay. The authors also flag a subtler institutional problem: because most bunds are built with free campaign labor or external funding, farmers who contributed little to construction feel little obligation to maintain them, expecting that outside help will return.

The perception gap extends to the benefits. More than 80 percent of adopters agreed that the measures control runoff, improve soil fertility and moisture, boost fodder and grass supply, and raise crop yields. Yet after years of promotion and awareness campaigns, around 40 percent of dis-adopters and nearly a third of non-adopters still disputed these benefits, a skepticism the researchers connect to the slow, incremental way bunds improve soil. Among non-adopters, 30 percent said their land was not eroding enough to warrant structures, and 36 percent objected that bunds consume scarce cultivable land. Labor shortages were cited by 22 percent. Encouragingly, some resistance is pragmatic rather than stubborn: about a third of dis-adopters and non-adopters protect their fields with traditional cutoff drains and planting instead, and roughly 48 percent of dis-adopters said they intend to rebuild their structures, citing erosion control and land productivity.

The study’s conclusions carry weight well beyond one Ethiopian watershed. Physical conservation structures are expensive and labor-hungry, and where their survival depends on annual mass mobilization rather than farmer ownership, the investment is at risk of evaporating one broken bund at a time. The authors argue that sustainable management will require locally agreed bylaws and extension monitoring to enforce repair, alongside planning that accounts for the specific socioeconomic profiles of households, the age of farmers, the size of their plots, and the depth of their perception of erosion. With the pressure on land intensifying as fallow periods shrink and marginal slopes are cultivated, and with climate change delivering longer dry spells punctuated by intense rainfall, the window for keeping Ethiopia’s soil on its fields is narrowing. The evidence from Lake Hawassa suggests that the cheapest insurance for these landscapes is not another campaign, but farmers convinced enough, and resourced enough, to maintain what has already been built.

Subject of Research: Adoption and dis-adoption of physical soil and water conservation measures by smallholder farmers in the Ethiopian Rift Valley

Article Title: Physical soil and water conservation measures in the Rift Valley area of Ethiopia: adoption and management challenges

Article References: Wolka, K., Daniel, K., & Gesesse, G. (2026). Physical soil and water conservation measures in the Rift Valley area of Ethiopia: adoption and management challenges. Environmental Challenges, Article 101656. https://doi.org/10.1016/j.envc.2026.101656

Image Credits: AI Generated

DOI: 10.1016/j.envc.2026.101656

Keywords: soil erosion, soil and water conservation, Ethiopia, Lake Hawassa, soil bunds, Fanya juu, adoption, dis-adoption, land degradation, smallholder farmers, Rift Valley, watershed management