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chahbani chahtech greenhouse watering systems automatic watering systems water saving irrigation systems farm irrigation systems underground irrigation agricultural irrigation garden irrigation arid regions vegetable irrigation efficient irrigation tree cultivation garden micro irrigation buried diffuser water prize arrosage micro arrosage agric irrigation watering irrigation agricole espace vert évaporation directe indirecte jardin irrigation de jardin arrosage automatique arroseur pour jardin diffuseur enterré arboriculture fruitière submersion matériel d'irrigation irrigation potager cultures maraîchères irrigation souterraine régions arides économie de l'eau économie de leau climate change drought hunger mitigation agric irr water