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An irrigation concept that serve the irrigation community, called: fertigation. A natural move forward in irrigation technique, fertigation (from the words fertilizers and irrigation) is an excellent method of applying chemicals and fertilizers to crops via the irrigation system water, mainly in drip ad other micro irrigation systems. The need for fertigation derives from the fact that traditional methods of fertilization are only partially effective and leave a lot to be desired. At the time the fertilizer is distributed, it may be too strong. For the delicate roots of the young saplings, causing then irreparable damage. Or on the other hand, it may be too weak, and thus useless. Most important however, is the fact that spread or sprayed fertilizer remains near the surface, hardly reaching the root tips and root hairs - the points of greatest absorption. Fertigation systems leaflet 
In the process of fertigation in irrigation systems, fertilizer is applied directly with the irrigation water. Therefore, wherever the irrigation water goes, the fertilizer goes with it. Fertilizer is applied only where needed, and in the proper quantities. The obvious advantages of fertigation in irrigation, therefore, are the saving of labor and machinery, and the efficient use of the costly chemicals and fertilizers to be applied. In fertigation, the extra activities involved in the separate application of fertilizer are no longer necessary; neither is the purchase of maintenance of dedicated equipment for fertilizer distribution. Additionally, such machinery often compresses the soil and may cause crop damage. In conclusion, one might say that fertigation is the most effective and least expensive way of proving nutrients To growing field irrigated crops. 
Fertigation systems leaflet