One of the most advantages of using soilless systems is its capability to control irrigation water and fertilizers supply (Sonneveld and Voogt, 2009). In this respect, it can be indicated that soilless culture will help to increase water and nutrient use efficiency in regions where water is scarce like Saudi Arabia. Furthermore, soilless culture have proven, world-wide, to increase production over soil because of its ultimate advantage to overcome soil borne pathogens (fungi, bacteria, nematodes). In connection, soilless considers a friendly environmental system since it requires less pesticides, steam sterilization or chemical fumigation.
