Drip irrigation layout for one acre of chilli, worked

Here is a drip irrigation layout for one acre of chilli, counted to the last end cap. The assumptions are printed, the parts carry our shelf prices, and where your plot will disagree with the page, the closing section says which numbers move and which stay put.

The lateral spacing does most of the deciding. Chilli goes in as paired rows, and one lateral between each pair puts the laterals 1.5 metres apart — 42 of them to the acre, a count the crop's own guide works through — and a plan that manages 42 of anything still needs to be boringly systematic. So this one is.

The assumptions on the table

A square acre, 64 by 63 metres, workable slope. Rows in pairs, 60 centimetres apart within a pair and 90 centimetres between pairs, with one lateral between each pair, running the 63 metre direction: **42 laterals of 63 metres**, totalling 2,646 metres of line. The spine crosses the 64 metre end where the pump sits.

Tape is the lateral here, not by economy alone but by fit: an annual crop, lifted with it. This sheet uses the 16 mm, 0.2 mm-wall flat tape in 1,000 metre coils.

Three coils, and fittings counted in pieces

Divide 2,646 metres by thousand-metre coils and buy three at ₹3,960: **₹11,880**, with 354 metres spare — margin that laying and transplant week will absolutely use.

The small parts teach a buying rule worth knowing. You need 42 takeups and 42 end caps, and the online floor on these ₹6 fittings is 100 pieces, so each line is 100 pieces at ₹600: **₹1,200** the pair, with 58 of each left over. Joiners for tape mends are the same ₹6 with the same floor, another ₹600 outside this bill; tape years eat them.

Spine, head and the valve

The non-return valve at the head is not optional trim. Without it, every pump shutdown drains the mainline back down the bore, and a system feeding 42 laterals cannot afford to refill that dead volume before water reaches the first row each time the pump restarts.

One 3-inch LDPE coil — 15 kg, 90 metres, **₹2,160** — runs the 64 metre boundary with the stub to the pump stand. At the head sit the two parts no sheet should omit: the ball-type non-return valve in 2 inch (**₹1,440**) and the SS HDPE connector (**₹558**) making the steel-to-plastic joint honestly. The rest of the head's steel — bends, nipples, the solvent tin — follows your pump stand, priced part by part here.

Pump duty: the honest hours

Chilli draws 3.5 to 6 mm a day at full cover — roughly 14,200 to 24,300 litres landing on this acre daily, or 15,700 to 27,000 lifted once drip's efficiency is counted. On a 3,000 litre-per-hour bore that is **just over five to nine pumping hours a day**, from a mild month to a hot one.

On a six-hour power window the same bore lifts 18,000 litres: enough for the mild end of that range, short of the hot end. The tape passes 10 litres an hour a metre, so 3,000 litres an hour runs about 300 metres of it, four or five laterals at a time, and the acre goes round in about nine valved blocks. The water requirement calculator re-runs these litres for your bore and acreage in under a minute.

The bill, one column

**₹17,238**, MRP with tax inside, each line checkable on the drip and LDPE ranges. Chilli's acre lands well under cotton's famous ₹29,133 — 42 laterals against 53, and thin tape against cotton's heavier wall. Outside the column, as always: the filter this crop's tape genuinely requires and we plainly do not stock, the head's remaining steel, freight, and everything pump-side.

• Flat tape, three 1,000 m coils: ₹11,880
• Takeups and end caps, 100 + 100 pieces: ₹1,200
• Sub-main, 3" LDPE 90 m: ₹2,160
• Non-return valve, 2" ball: ₹1,440
• SS HDPE connector, 2": ₹558

The variant that rewrites the sheet

One planting style deserves its own paragraph before the closing dials: single rows, each with a tape of its own. Set chilli as single lines at 0.75 metres and run a lateral down every one, and the count is the row count — 84 laterals, 5,292 metres, six coils — so the tape line doubles from three coils to six: **₹11,880 up to ₹23,760**.

The paired layout in this sheet needs the pairs set out for it, with the emitter wetting checked against the pair's width — each row stands 30 centimetres from the tape — and, if the pairs go under mulch film, the tape laid before the film goes down. Film placement is a one-chance job, and the film itself is not something we stock.

If your planting is the single-row kind, say so at ordering time and this whole sheet gets recounted around it. Either way, time the tape's arrival to the nursery calendar: the lines go down before the transplanting gang and the seedlings go into already-wet soil, so pipe that arrives after the trays are ready is pipe that arrived late.

Which numbers move when your field does

Lateral spacing moves the tape line hardest: at 1.2 metres you lay 53 laterals and four coils; at 1.8, 35 laterals and still three. A rectangular field re-lengths the spine, not the laterals. A weaker bore adds valves, never metres. And transplant dates stagger zones naturally — plant zone B a fortnight behind A and the flowering peaks stop competing for water at all.

The chilli crop page holds the agronomy; the system estimator counts the pipe and fittings from your own crop and acres. It divides the acre's area by the 1.5 metre spacing, so it shows 43 laterals and 2,698 metres rather than this sheet's 42 and 2,646, and it prices the sturdier round inline pipe, not this tape. For the field your patta actually describes, send the measurements — recounting forty-two laterals on paper is our job, and far cheaper than discovering the count in the field.