Tomato Yield Per Acre

There is no single tomato yield per acre for Uganda, and the four figures in circulation are not competing answers. They measure different things. The national statistic works out at roughly 2,250 to 2,400 kg an acre, a survey of 222 measured Ugandan plots averaged about 4,850, a multi location variety trial across six agro ecological areas returned about 2,000, and one released variety carries a catalogue figure near 9,400. Knowing which number you are holding matters more than the number.

That spread is not sloppiness. A national statistic divides everything grown by everything planted, including the plot behind a house. A farm survey measures growers who chose tomato as a cash crop. A variety trial measures one genotype under a research protocol. A catalogue figure is the best the breeder recorded. Budget against the wrong one and the arithmetic fails before the seed goes in.

Tomato Yield Per Acre in Uganda: Four Numbers, Four Ways of Measuring

Read the third row twice. The best adapted and most stable genotype in a replicated Ugandan trial across six agro ecological areas yielded 4,958 kg a hectare, which is below the national statistic. A research trial under a protocol did worse than the country average. Any yield figure you meet for Ugandan tomato has to sit somewhere inside that mess, and a page that hands you one number has hidden the problem rather than solved it.

The National Tomato Yield Figure, and Why It Is an Estimate

Walking the international production series for Uganda gives a tomato yield of 5,542 to 5,942 kg a hectare across the last ten reported years, with a ten year mean of about 5,815. Harvested area ran between roughly 6,290 and 6,810 hectares and production between about 36,600 and 39,800 tonnes. That mean converts to roughly 2,350 kg an acre.

Then check how those numbers were produced, because the data carries a flag on every observation saying where it came from. For Uganda's tomato series, not one observation is flagged as an official figure. All 64 yield observations in the series are flagged estimated. Area harvested is 47 estimated and 17 imputed by a receiving agency. Production is 50 estimated and 14 imputed. There is no year, anywhere in the series, in which Uganda reported an official tomato yield.

Before treating that as a finding rather than a broken check, I ran the control the method requires. Uganda carries official flags on 159 separate series in the same dataset, including maize area harvested in 59 years, maize production in 58, and green coffee production in 63. So the flag does appear for Ugandan crops. Its complete absence from tomato is a fact about the reporting, not about my reading of it.

What follows is not that the figure is wrong. An estimate built from area and consumption work can be perfectly serviceable. What follows is that the anchor everybody quotes for Ugandan tomato yield is modelled rather than counted, and a modelled national average is the weakest possible basis for a planning figure on one acre. The measured Ugandan numbers are the ones below.

One more thing the series settles. Production has been broadly flat for a decade, moving inside a band of about 36,600 to 39,800 tonnes. A claim that the Ugandan tomato market is growing at about 4 percent a year, which circulates on Ugandan pages including one on this site's own legacy category, does not describe that series. Growth of that order sits in the earlier 2000s, not in the recent record.

What 222 Ugandan Tomato Plots Actually Yielded

The best measured Ugandan figure comes from a survey by researchers at NARO's National Crops Resources Research Institute and National Agricultural Research Laboratories with Kyambogo University, covering 240 farmers in eight tomato districts across five agro ecological zones. Its productivity table reports on 222 plots.

Mean land planted to tomato was 0.68 acres, in a range of 0.1 to 3.5. Mean yield off that plot was 3,298.5 kg. Dividing one by the other gives the paper's own headline, 4,846.3 kg an acre, which the same paper also expresses as 4.9 tonnes an acre and 12 tonnes a hectare. Those three are the same measurement in three units and they reconcile.

So growers who chose tomato as a cash crop yielded roughly twice the national statistic. That is the single most useful sentence on this page for anyone planning an acre, and it is also the reason the two figures should never be averaged. They answer different questions: what does Ugandan land produce, and what does a Ugandan tomato farmer produce.

The paper carries an internal contradiction worth knowing, since it is the source everybody cites. Its introduction states that Ugandan tomato yields "remain as low as 4 t ha" and then, three lines later, that yields "continue to be low at 6 t ha", both against the same 16 tonne regional potential. Dividing its own stated national production of 40,124 tonnes by its own stated 6,671 hectares gives 6.0 tonnes a hectare, so the 6 figure is the one its own arithmetic supports. The page below uses the wider position rather than picking silently: the national figure sits around 5.5 to 6.0 tonnes a hectare and the source disagrees with itself inside that range.

The Gap Between the Worst Acre and the Best Acre

Averages are the least interesting part of that table. The same 222 plots recorded a minimum yield of 144 kg and a maximum of 12,120 kg. On the survey's mean plot size those are about 212 kg an acre at the bottom and about 17,800 at the top, and the plots were not all the same size, so treat the ends as the shape of the distribution rather than as two clean per acre figures.

The ratio is what matters. Between the worst and the best measured Ugandan tomato plot there is a factor of roughly 84. Not 20 percent, not double. Eighty four times. Whatever explains that is worth far more than any variety claim, and the survey's own candidates are the ones this site keeps returning to: bacterial wilt, blight pressure, water, plant population and soil fertility.

What a Ugandan Multi Location Variety Trial Yielded

The third number is the one nobody quotes and it is the most sobering. Under a Makerere University and NARO research programme, a local bacterial wilt resistant genotype was put against four commercial varieties grown in the country, three replications, six agro ecological areas of Uganda, analysed with stability models. The trial existed because a variety release requires multi location data.

The local genotype came out best adapted, most stable, and highest yielding across sites. Its yield was 4,958 kg a hectare, about 2,000 kg an acre. The winner of a replicated Ugandan variety trial across six zones landed under the modelled national average and well under what the farm survey measured.

Two readings are available and both are useful. Either trial conditions at those sites were harder than a commercial grower's field, which is plausible in a disease pressure trial, or the ceiling for open field tomato across Uganda's range of environments is genuinely lower than the promotional figures suggest. Either way, a grower who reads a 20 tonne an acre claim should ask why the best genotype in a six site Ugandan trial produced a tenth of it.

Plant Population: Where Yield Per Acre Begins

Yield per acre is yield per plant multiplied by plants per acre, and Ugandan growers vary the second term enormously. The national survey observed spacings of 30 by 45, 45 by 45, 60 by 60, 75 by 75, 90 by 90 and 100 by 100 cm, and reported that only 60 by 60 cm gave optimum yield under field conditions. Working from 4,047 square metres in an acre, those spacings give roughly:

A seven fold swing in plant population across spacings Ugandan growers actually use. That alone can move yield per acre more than any variety decision, and it silently changes every other per acre figure on a farm: seed, fertilizer, staking material, labour. Spacing method sits on our tomato spacing guide, which owns the decision.

Yield Per Plant Is the Number That Tests a Claim

Dividing a claimed yield per acre by a plant population turns an abstract tonnage into something you can picture, and it is the cheapest lie detector available. At the optimum spacing's roughly 11,240 sites, the arithmetic runs like this. These divisions are mine, using the survey's own spacing finding.

None of those upper figures is physically impossible for a single well fed plant with water, support and no disease. What the arithmetic shows is the multiple: an 18 to 30 tonne an acre claim asks for four to six times the per plant output that Ugandan farms measured, on every plant, with no failures. That is the claim being made, stated in a form a grower can weigh.

Converting Tonnes Per Hectare to Kilogrammes Per Acre

Most of the confusion around this query is a unit error, and it appears in the search results for it. One acre is 0.4047 hectares, and one hectare is 2.4711 acres. So a per hectare figure is multiplied by 0.4047 to reach per acre, and a per acre figure is multiplied by 2.4711 to reach per hectare.

Here is the error in the wild. The national survey states a farm average of 4.9 tonnes an acre against a potential of 16 tonnes a hectare. Search summaries and secondary pages restate this as 4.9 tonnes an acre against a potential of 16 tonnes an acre, which silently inflates the gap by a factor of about two and a half. Converted properly, 16 tonnes a hectare is about 6.5 tonnes an acre, so the survey's own measured farms were at roughly three quarters of the regional potential rather than at under a third of it. That changes the story from a catastrophe to a shortfall.

The same paper carries a smaller version of the mistake. It uses 6,000 kg an acre and 16 tonnes a hectare interchangeably as "the potential", and those are not the same quantity: 6,000 kg an acre is about 14.8 tonnes a hectare. An 8 percent discrepancy inside one paper's own framing, worth knowing if you are comparing its figures against anything else.

Auditing the 18 to 30 Tonne Per Acre Tomato Claims

Yield claims for tomato in Uganda cluster at 18, 23, 25 and 30 tonnes an acre, usually attached to a named hybrid, and one live Ugandan page puts a well managed acre at 25 to 30 tonnes. Converted, 18 tonnes an acre is 44 tonnes a hectare and 30 is 74.

Set those against the Ugandan record on this page. The modelled national figure is about 5.8 tonnes a hectare. Measured farms averaged 12. The regional potential cited in the research is 16. The best genotype across six Ugandan sites in a replicated trial made 5. NARO's own technology catalogue gives its one released tomato variety a performance figure of 23.2 tonnes a hectare, and that is a research figure for a released variety, not a field average. A claim of 44 to 74 tonnes a hectare sits roughly two to three times above the best number any Ugandan research document on this page carries, and seven to twelve times above the national statistic.

The usual construction behind such a figure is the top of a yield range multiplied out as though it were the middle, sometimes taken from a protected cropping system and presented as field yield. Our page on tomato under protected cropping covers why greenhouse figures do not transfer, and the money version of the same audit is on tomato farming profit per acre.

A practical test before you accept any yield figure: ask what spacing it assumes, ask whether it is field or under cover, ask whether it is harvested or saleable weight, and ask who measured it. A figure that cannot answer those four is a marketing number.

What Caps Tomato Yield on a Ugandan Acre

The survey asked growers what limits them and the answers are consistent with the yield spread. High pest and disease burden was named by around 20 percent of farmers, high input costs by around 11, high seed cost by around 10 and seasonal variability by around 9, with poor soil fertility also ranking high. Note that these are shares of farmers naming each constraint, not shares of production cost; the paper's own abstract relabels them as cost shares and its results section does not support that.

Disease is the largest single brake and it is specific. Bacterial wilt was reported in all eight districts, ranks first among diseases, and has no chemical control available in Uganda, so it takes plants out of the population rather than reducing yield per plant. A field losing a fifth of its plants to wilt has lost a fifth of its acre before anything else happens. The disease side is on tomato diseases and their treatment and the programme side on the tomato spraying schedule.

Water is the second. Any deficit during growth, flowering or fruit set cuts yield, and 80.6 percent of the surveyed growers irrigated by at least one method, most of them by hand. The method matters less than whether water arrives at flowering. Our guide to drip irrigation covers the option most growers are not using, since only 7 percent of them had it.

The cheapest yield on the list is cultural. Ugandan on farm trials found mulching raising yield by 100 percent, staking by 87 and trellising by 83, with mulched plots also carrying less late blight than clean weeded ones. Those are one programme's figures rather than a national average, so read the scale rather than banking the number, and note that 73.3 percent of the surveyed growers already mulch. Nutrition sits alongside it: 90.9 percent used some fertilizer, most reaching first for foliar products and applying a phosphate starter once at planting, and the schedule belongs on our tomato fertilizer schedule.

Harvested Yield Against Saleable Yield

Every figure on this page is field weight. What you sell is less, and the gap is not documented for Ugandan tomato. No defensible national post harvest loss percentage for this crop could be sourced, which matches what earlier work on this site found, so no percentage appears here.

The mechanisms are clear enough to plan around without a number. Tomato is soft, it is picked repeatedly over a harvest window, and Ugandan growers move it in wooden boxes, plastic basins and woven baskets: the survey recorded 64.7 percent using wooden boxes, 23.3 percent plastic basins and 18 percent woven baskets. Fruit at the bottom of a deep container carries the weight of everything above it. Anthracnose and rots show up after picking, not before. Fruit sold mature green, which 18.4 percent of growers did, travels better than ripe fruit, which 72.8 percent sold.

There is a measurement problem underneath this and it is worth its own sentence. None of those containers has a standard weight in Uganda, and the survey recorded growers reporting non standardised scales and traders arriving with oversized boxes. A yield recorded in boxes cannot become a yield per acre in kilogrammes. If you want to know your own yield per acre, the only way is to weigh, and to weigh what leaves the farm rather than what came off the plant.

Choosing a Planning Yield You Can Budget Against

Pulling the page together into something usable. For a first crop under the practices most Ugandan growers use, the measured farm mean of about 4,850 kg an acre is the defensible planning figure, and the honest low case is well below it, because 222 real plots included one that made 144 kg. For a well managed acre with hybrid seed, irrigation reaching flowering, staking and a disease programme that handles the blights, the regional potential of 16 tonnes a hectare, about 6,475 kg an acre, is the highest figure the Ugandan research record supports as achievable under good management.

Above roughly 8,000 kg an acre, no Ugandan measurement on this page supports the claim for an open field crop. That ceiling is stated the same way on the tomato pillar page and it is deliberate.

Then do the thing a yield figure exists for. Work out the kilogrammes you need to cover your costs, compare that against the low case rather than the mean, and see whether the acre survives. Our break even calculator and farm profit tool do that arithmetic, and the input side is on cost of tomato farming per acre. The wider production picture sits on the tomato farming guide in our vegetable growing hub.

Questions About Tomato Yield Per Acre in Uganda

What is a realistic tomato yield per acre in Uganda? About 4,850 kg for a grower using the practices most Ugandan tomato farmers use, which is what 222 measured plots averaged. Around 6,475 kg an acre is the top of what the research record calls achievable under good management and favourable weather. The national statistic of roughly 2,350 kg an acre describes all Ugandan tomato land including marginal and backyard production, so it is too low for a commercial plan and too high to ignore.

How many tomato plants fit on an acre? About 11,240 sites at the 60 by 60 cm spacing the national survey identifies as giving optimum field yield, before paths and headlands, which is why a working figure of 10,000 to 11,200 is used. Closer spacings recorded on Ugandan farms reach nearly 30,000 sites and the survey lists them among those that did not deliver optimum yield.

Can I really get 30 tonnes an acre from tomato? Nothing in the Ugandan record supports it for an open field crop. Thirty tonnes an acre is 74 tonnes a hectare, against a national statistic near 5.8, measured farms at 12, a cited regional potential of 16 and a released variety's catalogue figure of 23.2. It also requires about 2.67 kg of marketable fruit from every plant on the acre with no gaps and no losses. Ask what spacing, what system and who measured before accepting any such figure.

Does a hybrid variety double my yield per acre? Hybrids dominate what Ugandan growers plant, with four of the five commonest varieties being hybrids chosen for yield potential and shelf life, and the survey's growers who used them averaged 4,846 kg an acre. So the hybrids were already inside that average. Seed choice matters and it is not the lever people expect it to be: in a replicated six site Ugandan trial the highest yielding genotype made under 5 tonnes a hectare. Our tomato seed page covers what a variety claim can and cannot be checked against.

Why is the national figure so much lower than what farmers measured? Because they count different populations. The national series divides all Ugandan tomato production by all harvested area, and that area includes plots grown without inputs and without irrigation. The survey sampled districts where tomato is grown as a cash crop, and 90.9 percent of its growers used fertilizer while 80.6 percent irrigated. Neither figure is wrong. Averaging them would be.

Is the Ugandan national tomato yield figure reliable? It is an estimate, and that is verifiable rather than a matter of opinion. Every observation in Uganda's tomato yield, area and production series is flagged as estimated or imputed by a receiving agency, with no year flagged as an official figure, while 159 other Ugandan series in the same dataset do carry official flags. Use it as a rough anchor and never as the basis for an acre budget.

How do I measure my own yield per acre? Weigh what leaves the farm, not what comes off the plant, and record it against the area you actually planted rather than the plot you own. Ugandan marketing containers have no standard weight, so a record in boxes or basins cannot be converted to kilogrammes later. Our crop production record template gives a sheet for it.

Does yield per acre tell me what I will earn? Only with a price, and tomato is one of the most volatile items in Uganda's monthly commodity price table, swinging about 33 percent between its lowest and highest month against 65 percent for round onions and about 56 percent for matooke by the bunch. The survey's own measured farm gate prices ranged from about USD 0.05 to USD 1.13 a kilogramme, a more than twenty fold spread, with a mean near 0.59. A yield multiplied by a peak price is not a forecast. Check the current tomato price page and read how farm gate and retail prices differ before building any revenue figure.

The most valuable yield figure on your farm is the one you measured yourself last season, and almost no Ugandan tomato grower has it because the crop leaves in unweighed containers. Weigh one season's harvest and you will have a better planning number than anything on this page. Current prices and local buyer availability both move through the season, so check them where you sell rather than working from a figure on a page.