Drip Irrigation: Benefits, Cost, Subsidy & How to Set It Up
Drip irrigation delivers water drop by drop directly to the plant root zone. Done right it cuts water use by 30–60%, raises yield and quality, saves labour and lets you feed fertiliser through the water (fertigation). With government subsidy covering a big share of the cost, it is one of the best investments on a water-short farm.
Why it works
- Water savings of 30–60% versus flood irrigation, because there is almost no runoff or evaporation loss.
- Higher yield and quality — steady moisture with no stress and no waterlogging.
- Fewer weeds (only the crop row is wetted) and fertigation — apply fertiliser precisely through the drip.
- Works on undulating land and sandy soils where flooding fails.
What it costs — and the subsidy
A drip system is a one-time investment per acre that pays back over a few seasons through water, fertiliser and yield gains. Under the government micro-irrigation programme (part of PMKSY – Per Drop More Crop), farmers get a substantial subsidy — commonly around 55% for small/marginal farmers and 45% for others (rates vary by state). Apply through your state horticulture/agriculture department or the PMKSY portal.
Planning a simple system
- Water source + filter: a screen or sand filter is essential — clogged emitters are the No. 1 failure.
- Mainline and sub-mains carry water to the field; lateral lines with inline drippers run along each crop row.
- Emitter spacing matches your crop and soil (closer on sandy soil).
- Add a venturi/fertiliser tank for fertigation.
Get the design done by an approved micro-irrigation company (usually required for the subsidy) so flow and pressure are matched to your pump.
Keep it running
Clean the filter regularly, flush the lateral ends periodically, and treat the lines for salt/algae as advised. A well-maintained drip system lasts many years.
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