The Drip Irrigation System
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Drip irrigation is one of the most efficient systems currently available. The water supply is constant and uniform, drop by drop, which allows the root zone to be maintained under low-stress conditions. The water applied by drippers forms an onion-shaped wetting within the soil, commonly referred to as a "wet bulb." This bulb typically reaches its maximum diameter at a depth of approximately 30 cm, and its shape is strongly influenced by soil characteristics, particularly its texture. A drip irrigation system achieves efficiencies of 90–95% in the use of water and fertilizers, while a gravity-fed system achieves efficiencies of 55–60%.
Drip irrigation differs greatly from other irrigation systems, so it must be managed correctly to maximize its benefits and avoid problems. The main advantages of the system, as well as its disadvantages, are listed below. Figure 1. Main citrus fruits: lemon, orange, grapefruit, mandarin. Advantages: System automation. It requires little labor, both for operation and for fertilization and weeding. Drip irrigation avoids watering non-target areas, preventing the emergence and growth of weeds. It also prevents the spread of diseases by reducing direct contact of water (humidity) with foliage, stems, or fruit. Adaptability. It can be installed in various topographical conditions and is highly versatile, utilizing water of varying quality and soil salinity limitations. It also allows irrigation while simultaneously operating agricultural machinery, harvesting, spraying, etc. High efficiency. Using only the water needed for the crop achieves high irrigation uniformity. The high frequency of irrigation, but low flow rate, maintains an optimal moisture level in the root zone of the crops, thus achieving uniform root development. Plant nutrition is detailed (fertigation).
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