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Irrigation economics

July 10, 2026

Farming – Agribusiness & Value Chains · Editorial

By Moakanyi Magazine · Global Issue · June 2026

Botswana farms in one of the driest agricultural environments in the region, yet much of its irrigation still behaves as though water were abundant. That contradiction becomes expensive the moment global conditions tighten. When the broader economy slows and food security wobbles, the farm that uses less water per tonne is simply the farm that survives the squeeze.

The macro backdrop is unhelpful. The World Bank cut its global growth outlook and warned of a sharper drop if war fallout spreads, a signal that the cushion of cheap imported food cannot be assumed. For a net food importer like Botswana, that strengthens the case for getting more crop out of every litre at home, while imports are dearer and less certain.

Water efficiency as a balance-sheet item

Drip and precision irrigation are usually pitched as environmental choices. In a water-scarce country, they are financial ones. Every litre saved is a litre that does not have to be pumped, paid for, or competed over, and in a tight macro environment those savings compound across a whole season rather than appearing as a one-off.

The saving is double-counted in the farmer's favour, because water in Botswana is rarely free at the point of use. It is pumped, which means it is fuelled, which means an inefficient irrigation system is also an energy-hungry one. Cut the water and you cut the diesel or the electricity bill alongside it. Efficiency on one input quietly buys efficiency on another.

Water saved is the cheapest crop input there is.

Food-security shocks change the maths

When global growth is strong, an inefficient farm can lean on cheap imports to fill any gap. When growth is cut and trade routes are uncertain, that fallback weakens. Water-efficient farming hedges against exactly this scenario by raising the share of local demand that domestic producers can reliably meet, even in a poor rainfall year.

There is a national-account angle as well. Every tonne of vegetables grown efficiently at home is a tonne that does not have to be imported in hard currency. In a softer global economy, where the Pula's purchasing power on imports is under pressure, water-efficient domestic production is a small but real defence of the country's food import bill, not just of an individual farm's margin.

Self-sufficiency is built one efficient hectare at a time.

The investment that pays in a downturn

The awkward truth is that water-efficient systems cost money upfront, which is hardest to find precisely when the economy slows. That is the argument for treating irrigation efficiency as priority infrastructure now, through CEDA-backed finance and targeted support, rather than as a discretionary upgrade to be deferred until conditions improve – because the conditions are unlikely to improve quickly.

Sequencing matters here too. The cheapest time to install an efficient system is before the drought, not during it, when every farmer wants the same equipment at once and prices and waiting times rise together. Financing the upgrade in the calmer year, and spreading the cost across the seasons it protects, is how the investment becomes affordable rather than aspirational.

The payback is also more reliable than most farm investments, because water scarcity in Botswana is structural rather than seasonal. A new crop variety might fail in a given year, but the value of using less water holds in every year, wet or dry. That predictability is what should make irrigation efficiency attractive to lenders as well as farmers: the return does not depend on the rains, which is precisely the kind of certainty that agricultural credit usually lacks.

The system you install in the good year carries you through the bad one.

For Botswana, irrigation economics is where climate risk and macro risk meet. A softer global outlook does not make water-efficient farming a luxury; it makes it the most defensible investment a farm can make. The producers who move first will be the ones least exposed when the next shock arrives, and the country's food security will rest on how many of them there are. In a country this dry, the farm that masters its water has already mastered its largest uncontrolled cost, and that mastery only grows more valuable as the global picture becomes less generous.

Sources: Reuters

By The Cabanga Desk

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