There is no universal number for drip irrigation tape per hectare. The driver is row spacing: at one metre row spacing a hectare needs roughly ten thousand metres of tape, before allowances for headlands and connections.
Emitter spacing and flow rate come next. Closer emitter spacing suits sandy soil where water spreads poorly; wider spacing suits heavier soil. Wall thickness decides whether the tape lasts one season or several.
Total system cost also includes filters, main and sub-main pipes, fittings and valves. These often account for a significant share of the budget, so it is worth specifying them together rather than separately.
Combining drip tape with mulch film reduces evaporation further and usually pays back within a season. Send us your field layout and we will estimate the full bill of materials.