Drip Irrigation and Solar Combo Economics in Pakistan Agriculture

Key Takeaways

• Punjab's PRIAT programme (2022-23 to 2026-27) lists a subsidy of 75% of drip or sprinkler system cost up to 7.5 acres and 60% for the 7.6 to 12.5 acre slab, with the same slabs for the solar system that runs it. It is not an entitlement, and the department's pages are undated.
• Under PRIAT the farmer's affidavit says the subsidised solar system will run drip or sprinkler (HEIS) only, not flood pumping, and will not be sold or handed over for five years.
• Water saved depends on crop and site: 55% on kinnow in a Sargodha trial, 40% on wheat in an IFPRI paper (loosely worded), and 50% as the OFWM's pooled figure for unnamed drip and sprinkler studies. A 95% figure appears in two places and means different things: a director general's "up to 95% of water" in a 2019 news report, and irrigation efficiency of as much as 95% in the PRIAT document.
• Yield gains are crop-specific. One kinnow trial found 40.46% higher yield. No source we found supports a single figure for cotton, maize, citrus and vegetables together.
• We found no Pakistani source showing that drip lets a farm buy a smaller solar pump. Power follows head times flow, drip needs pressure at the emitter, and the PRIAT solar document says a system to operate a 10 hp motor is provided in all scenarios.
• Retail prices are not comparable: one seller's 5 HP price does not list a pump (Rs 540,000 to Rs 730,000), and two include pump and installation (Rs 750,000 to Rs 900,000, and 8 to 12 lakh).

Introduction

Solar pumping and drip irrigation are often sold as one package, but the evidence behind each half is different. The subsidy rules come from the Punjab Agriculture Department. The water and yield results come from a small number of studies on particular crops. The prices come from retailers. This guide keeps the three apart and says which is which.

What does the Punjab subsidy pay for drip and solar?

The Agriculture Department's On-Farm Water Management (OFWM) wing publishes the rates for High Efficiency Irrigation Systems (HEIS), meaning drip and sprinkler. The rate depends on the programme, the district and the year.

Percentages are shares of total system cost. A farmer installing on 12.5 acres gets 75% up to 7.5 acres; the department's table gives 60% for the 7.6 to 12.5 acre slab. The FAQ words it as 75 percent for up to 7.5 acres and 60 percent for more than 7.5 acres, so ask whether the lower rate applies to the whole system or only to the extra acres.

Four conditions matter before you plan around the subsidy:

• Drip comes first. The department's FAQ says the drip or sprinkler system is a pre-requisite for the solar system.
• Solar is for HEIS only. Under PRIAT the farmer's affidavit says the solar system will be used for HEIS (drip or sprinkler) only and will not be used to pump groundwater for flood irrigation, and that it will not be sold, transferred or handed over within five years.
• The system is sized to a 10 hp motor. The PRIAT solar document says a solar system to operate a 10 hp motor would be provided in all scenarios.
• It is not an entitlement. The programme document says a balloting process is run at district level when applications exceed the quota. The FAQ says applications are served first come, first served. Neither page carries a date, so ask your district OFWM office whether PRIAT is still accepting applications. Its period ends in 2026-27. For the solar application, applicants attach a Fard Jamabandi, a valid CNIC copy and an affidavit on stamp paper.

Two further cautions. A flat 60% is not the current drip rate: it is the second PRIAT slab, and the rate a 2019 news report described. And one retailer's 2026 page still advertises up to 80% subsidy on solar tubewell installation, while the OFWM FAQ describes the old tubewell solarisation scheme as ended and says solar is now subsidised for running drip systems (our translation of an Urdu answer on an undated page). Other solar rows on those pages cover farm ponds and dugwells.

How much water does drip save?

The answer depends on the crop, the baseline and the site. These are the Pakistani results that trace to a published page.

On mango, a survey of 30 drip and 30 conventional farms in Lodhran found water productivity of 0.93 kg per cubic metre under drip against 0.57 kg under conventional irrigation. The drip farms had larger holdings, so the comparison is not clean.

You will also see 95%. A 2019 news report quoted the OFWM director general saying farmers can save up to 95% of water. The PRIAT programme document uses 95% for irrigation efficiency, not for water saved, and the same news report gives the official's own litres: 412,000 litres per acre for flood irrigation against 232,000 under drip. The report does not state the crop or season.

What yield gains are documented?

• Kinnow: 40.46% higher fruit yield under drip than under flood in the Sargodha trial, on mature trees at one research station.
• Pooled range: the OFWM FAQ states a yield increase of 20 to 100 percent for unnamed studies of drip and sprinkler on sugarcane, citrus, potato, wheat and gram. Cotton and maize are not among them.
• Cotton: the only figure found is a 2007 interview about a seven-acre pilot at Faisalabad, which reported 1,520 to 1,680 kg per acre under drip against 960 kg under flood. It is a news quote 19 years old, not a published trial.
• Mango: gross margins on drip farms were about 31 percent higher than on conventional farms, after counting the farmer's share of installation cost. That is margin, not yield.
• Maize: no yield figure was found. A cost-benefit study of 45 maize sites in Punjab gave benefit-cost ratios of 1.65 for electric, 1.52 for solar and 1.44 for diesel drip systems. Electric scored highest on cost, and the authors recommend that solar drip systems be subsidised.

The OFWM says drip suits orchards and high-value row crops such as vegetables, cotton, maize and sugarcane, and elsewhere that it is most suitable for orchards and vegetables. A 2019 news report quotes farmers who say drip is not appropriate for row crops like wheat, maize and rice. If you farm row crops, ask what yield evidence the seller has for your crop on your soil.

Does drip let you buy a smaller solar pump?

Not on any figure we could source. The physics is simple: hydraulic power is head times flow, and the array follows. A university course on solar pumping gives the formula as Hydraulic Power (W) = TDH (m) × flow (l/s) × 9.81, where TDH is total dynamic head, and sizes the nominal PV array as electrical power divided by 80%, which covers temperature and age derating. Electrical power is hydraulic power divided by pump efficiency. Less water to lift lowers the flow term, but drip also needs pressure at the emitter: typical commercial emitters have minimum pressures of 50-100 kPa.

Two cautions. A MIT study of low-pressure emitters in Morocco and Jordan reported that they could lead to savings of 22-31% in the capital cost of a pump and emitters and in energy cost, but that compares one drip design with another, not drip with flood, and it is not Pakistani data. And the PRIAT solar document provides a system to operate a 10 hp motor in all scenarios; it does not say why. Size the pump from your well's head and your crop's daily volume, and ask the installer for that calculation in writing.

What do solar tube wells cost in Pakistan?

Three retailers publish price tables. They are not comparable: the first does not list a pump in what its price covers, and the other two include the pump and installation.

One lakh is 100,000 rupees. These are retailer prices, not quotes. The OFWM FAQ puts the average drip system at Rs 350,000 to 450,000 per acre for a five-acre scheme, with no date, so the rupee year is unknown, and that figure does not include the solar system.

We found no published payback study for solar and drip together. A 2019 news report gives three anecdotes: one Rahim Yar Khan farmer said his solar system paid for itself in just one year against diesel, while an 80 percent solar subsidy was in force; the manager of a farm that installed drip and a solar plant for PKR 25 million said it would not break even before its sixth year; and a dune-orchard farmer said it will take another four years to recoup his whole investment, not only the solar part. For solar tube wells alone, sellers disagree: Pakistan Solar Traders says most systems pay for themselves within 1.5 to 3 years, while Solar Citizen says 4-6 years for a 10 HP system at roughly 18 lakh with 3-4.5 lakh in annual diesel savings. Both are sales claims. Treat any payback as an estimate until you have your own diesel bill and pumping hours.

Summary and Recommendations

• Ask your district OFWM office whether PRIAT is open and which slab applies to your acreage before you sign with an installer.
• Compare quotes by what they include: pump, installation, borewell work and mounting.
• Ask for the head and flow calculation behind the array size. Do not accept a percentage cut for drip without one.
• Expect results to vary by crop. The studies we found are mostly on orchard fruit and wheat, and the OFWM calls drip most suitable for orchards and vegetables.
• Work out your diesel cost in solar tube well versus diesel: the monthly savings math and check drive sizing in the solar pump VFD selection guide.

Correction, 28 October 2026: earlier versions of this guide quoted a flat subsidy rate, a fixed cut in array size, a single yield gain and a pair of system prices that could not be traced to any source. They have been removed.