One of the fundamentals of organic farming is rotation of crops (rotation of crops or crops), which means that certain plants on the same garden or field are grown in succession in a certain order. This system, in which different plants are grown together, provides many benefits both in terms of soil and plant.
The alternating system should be done in line with the needs of the gardener, in particular the needs of the plants, as well as the quantitative and qualitative requirements. In this sense, it is important not to forget to take into account the principles of relationships between plants (siblings) in order to be effective.
The rotation of crops is absolutely essential for large-scale vegetable gardens (1 acre and more). In smaller gardens, because of the closer proximity of the parcels, many of the harmful and fungal diseases can not be prevented, but they are important for soil health.
Link : http://balconygardenweb.com/crop-rotation-how-to-do-it-successfully-to-have-a-productive-vegetable-garden/