The combined irrigation and fertilisation is called fertigation. There are different way how fertigation can be done: mixing chemical fertiliser with irrigation water; using partly treated wastewater which contains still nutrients; mixing (separately collected) urine as a nutrient source and mixing it to the irrigation water. Fertigation helps saving freshwater resources and decreases the dependency on depleting mineral fertilisers. Generally, drip irrigation and subsurface drip irrigation are the most appropriate application method for fertigation.
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