The DCF tape is the solution offered by Irritec for the irrigation of vegetables in poor quality sandy soils. With a double inlet filter along both sides of the labyrinth and a filtration area of 254 mm2 per metre, it is particularly suitable for use with poor quality water.
This special filter extends the life span of the dripline while maintaining its high level of performance. For this reason, even at low flow rates, the recommended filtration level is 120 mesh. The reduced dripper spacing (less than 7.5 cm) results in a more uniform wetted area, thus promoting the germination of the seeds. This close spacing is particularly beneficial for field crops such as onions, which are often grown on sandy soils. The small distance between the emitters allows for fertilisers and soil chemicals to be applied directly to the root zone. High uniformity can be achieved along the whole length of the drip line because of its low CV and the “x” and “k” values in the pressure-flow equation. The DCF dripline is available in 16 and 22 mm diameters with an emitter spacing of 7.5, 10, 15, 20, 30 and 40 cm. The hourly flow rates available at 0.7 bar working pressure are 0.6, 0.9 and 1.2 litres. Available wall thicknesses: 6, 8, 10 and 12 mil.