Soil is very important for the plants. It is not merely a support system, but a complex world from which the roots obtain water and other required elements. In addition, soil is inhabited by small animals, insects, microorganisms (e.g. fungi and bacteria) which all influence the plant life in one way or another. One can talk about a soil evolution, that is, change in its characteristics based upon climate, presence of animals and plants as well as man’s action. Therefore, a natural soil, in which evolution is slow, is very different from a cultivated one. Soil is composed of solids (minerals and organic matters), liquids (water and dissolved substances), gases (mostly oxygen and carbon dioxide) and contains living organisms. All these elements provide its physical and chemical properties. Managing the soil properly is necessary in order to preserve its fertility, obtain better yield and respect the environment. Testing the soil on the other hand is a must in order to manage it properly

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