Farming and potato dependence in pre-famine Mayo

Potato dependence in pre-famine Ireland reached its deepest point in counties such as Mayo, where by the early 1840s close to nine in ten people relied on the potato for most of their food. Subdivided farms, the conacre letting system, and a single high-yielding but poor-quality variety, the lumper, combined over several decades to make that dependence almost total by the time blight reached Connacht in 1845.

None of this happened suddenly. It was the result of population growth, landlord policy, and a crop that let very small plots feed large families, all working together across the first four decades of the nineteenth century. What follows sets out that build-up: how the land itself was divided, how the landless labourer got access to a plot at all, and why one particular potato variety came to dominate so much of the west before blight ever reached it.

How subdivision shrank the farms of Mayo

Mayo’s population rose sharply in the decades before the famine, and the land was divided again and again to hold it. The county’s official population stood at 388,887 in the 1841 census, more than double what it had been at the start of the century. As sons married and started households of their own, fathers split their already small holdings between them rather than sending anyone away, a pattern repeated across the west of Ireland.

The result was that Mayo holdings, on average, came to little more than five acres, and a large share of the county’s land, concentrated in the mountain and coastal parishes, was farmed under rundale: joint tenancies in which a cluster of families shared out strips of arable, bog, and grazing ground between them rather than each holding a single compact farm. A rundale township organised its people into a clachan, a cluster of cabins, with the best land nearest the houses and rougher ground worked further out. It was a workable system for dividing poor and uneven land fairly. It was not a system built to survive one bad harvest, let alone several.

Landlords had encouraged this subdivision of holdings in Mayo for years, since more tenants on smaller plots meant more rent collected overall, even if each individual tenant paid less. Attitudes began to shift only from around 1830, when some estates started inserting clauses against further subletting. By then the pattern was already set across most of the county, and it proved very difficult to reverse.

A holding of five acres, divided again between two or three sons as they married, left each new household with barely enough ground to grow food for itself, let alone anything to sell. Grain, cattle, and other produce still moved off these farms toward market and toward the rent, but the potato patch was what fed the people who worked the land. It was the one crop that could be relied on to produce enough calories per acre to keep a family alive on a plot that size, which is precisely why holdings kept shrinking rather than reaching some natural floor. The potato did not cause subdivision on its own, but it removed the check that would otherwise have stopped it.

Conacre: land without a lease

Beneath the smallholders was a still larger group with no farm of their own at all. The conacre system in Ireland let landless labourers rent a patch of ground, often under an acre, for a single season, usually to grow potatoes. The letting typically ran for eleven months, a term chosen specifically because it fell just short of creating any lasting tenancy or right of occupation. The labourer supplied seed and labour; the farmer or landlord supplied the ground and, often, manure. When the potatoes were lifted, the arrangement ended.

Conacre was documented in detail by the Royal Commission for Inquiring into the Condition of the Poorer Classes in Ireland, the body known as the Poor Inquiry, which sat from 1833 to 1836 and gathered evidence from more than 1,500 witnesses across the country. Its Appendix F was devoted specifically to baronial examinations on conacre, small tenantry, consolidation of farms, and the displacement of tenants, a sign of how central the practice had become to how the rural poor actually lived. For families with no land of their own, a conacre potato patch, rented for one season at a time, could be the difference between feeding a household through the winter and not.

The system offered no security. A labourer with no lease, no fixed address on the land, and no legal standing beyond a season’s agreement had nothing to fall back on if the crop he had rented ground to grow failed.

The lumper potato and the end of variety

The crop nearly everyone was growing, on rented conacre ground and on their own small plots alike, was increasingly one variety: the lumper. First recorded in Ireland in 1808, the lumper had by the 1830s become the dominant potato in the west, prized above all for its yield. It grew well on poor, wet, marginal soil where little else would, and it produced more potatoes per acre than the varieties it replaced, in some estimates by as much as 30 per cent.

That yield came at a cost. Contemporary testing by the Royal Dublin Society in the 1830s found the lumper had a lower dry matter content than other potatoes then in cultivation, and it was widely regarded as watery and poor eating, a variety some labourers were given specifically because better potatoes were sold or kept back. Evidence gathered for the Poor Inquiry recorded the lumper by name in witness testimony from Mayo among other western counties, one small sign of how far the variety had spread. Farmers grew it anyway, because on land subdivided down to a few acres, yield mattered more than taste.

The wider effect was a loss of variety itself. Where surveys at the start of the century had recorded a dozen or more potato varieties grown in a single county, by the 1840s much of the west had narrowed down to one. A population that depended on a single crop was now depending, in large part, on a single variety of that crop, grown on the smallest and poorest ground in the country.

The hungry gap before the new crop

Even in an ordinary year with no blight at all, potato dependence carried a built-in season of scarcity. The old year’s potatoes, dug the previous autumn, ran low or turned soft and unfit to eat well before the new crop was ready to lift, a stretch that fell roughly between June and August depending on the district and the planting date. Rural households of the period called this the meal months, because it was the point in the year when families who normally ate almost nothing but potatoes had to find money for oatmeal instead.

The Poor Inquiry recorded how people managed the gap: buying potatoes on credit at inflated prices if they could get them at all, gathering nettles, seaweed, and wild charlock, and digging potatoes early, while they were still no bigger than walnuts, rather than waiting for a fuller harvest. The historian Austin Bourke, who studied the pre-famine potato economy in detail, described the county’s growing reliance on the crop as a sinister trend toward monoculture, one that was already straining household budgets and diets years before blight made the strain fatal. The hungry gap did not kill on the scale the famine would. It showed, every single year, how little slack the system had.

Why potato dependence pre-famine Ireland concentrated in the west

Potato dependence in pre-famine Ireland was not spread evenly across the country. It was heaviest precisely where subdivision, conacre, and the lumper overlapped most: the western seaboard counties, Mayo among them. Agricultural labourers in the west were recorded eating between 10 and 14 pounds of potatoes a day, with women and children eating somewhat less, and for roughly a third of the national population the potato supplied around 90 per cent of all food eaten.

The potato made this way of life possible in the first place. A single acre of ground dug in the ridge-and-furrow method known as lazy beds could produce enough potatoes, combined with buttermilk, to feed a family for close to a year, which is exactly why land could be subdivided as far as it was. Nowhere else in Europe could a crop support so many people on so little ground.

That was the strength of the system, and, when the crop failed, its complete weakness. The Devon Commission, appointed in November 1843 to examine land occupation across Ireland, reported in February 1845, months before blight reached the country. It found that most tenants held no lease at all and had no protection against eviction, a structure that left them as exposed as their potato patches.

Contemporary surveys picked up a clear pattern in this, not a uniform national picture. Evidence gathered for the Poor Inquiry in the mid-1830s showed the lumper concentrated heavily in western counties, Mayo among them, with far fewer mentions further east, and separate accounts from the period put the share of the population growing the lumper almost exclusively at around a third nationally, concentrated in Munster, Connacht, and west Leinster. Mayo sat well inside that western band, sharing the same combination of subdivided land, conacre for the landless, and a diet built around one variety chosen for yield over quality, which is part of why the county’s experience of what followed after 1845 was among the worst recorded anywhere in Ireland.

What historians cannot know

The surviving record describes the system well but cannot always quantify it precisely. Poor Inquiry witnesses gave their honest impressions of local conditions parish by parish, not a uniform national survey, so figures on conacre rents, holding sizes, and potato consumption vary between districts and cannot simply be averaged into one national number. Rundale arrangements were informal and locally adjusted, agreed within townlands rather than recorded in any central registry, so the true extent of joint tenancy in a given parish of Mayo is often an estimate drawn from later commentary rather than a contemporary count. And because the famine itself destroyed households, scattered families, and interrupted record-keeping within a few years of these surveys, no census afterward could confirm how the pre-famine pattern would have continued had blight never come.

Sources and further reading

• Royal Commission for Inquiring into the Condition of the Poorer Classes in Ireland (the Poor Inquiry), Appendix F: Baronial Examinations Relative to Conacre, Quarter or Score Ground, Small Tenantry, Consolidation of Farms, and Dislodged Tenantry, 1836.
• Royal Commission on the Occupation of Land in Ireland (the Devon Commission), Report, 14 February 1845.
• Central Statistics Office Ireland and Mayo county history resources, Census of Ireland 1841, population returns for County Mayo.
• History Ireland, “The Lumper Potato and the Famine,” 18th-19th century history archive.
• Wikipedia contributors, “Rundale” and “Irish Lumper,” reference articles consulted for landholding structure and potato variety history.
• Mayo-Ireland.ie, “An Outline History of County Mayo, Part 4: 1800 to 1900.”

The pressures building in Mayo through these decades, on the land itself, at the rundale of holdings, and on a single potato variety, set the stage for what came next. For the county’s broader emigration history and for how the potato failure returned in 1848, after the first shock of blight, the same conditions described here explain why recovery proved so difficult. Understanding the structure of a Mayo townland before the famine is the starting point for understanding almost everything that followed it.