Soil is a complex thing after all. It is a heterogeneous mixture with inorganic particles that may have charges on them. Since soil is composed by so many different factors, the pH, temperature, ratio of each element can all be different from one day to another. For the plant to be able to obtain sufficient amount of nutrients without being affected by the soil condition, plants have developed a complex root system. Each plant specie may have a different shape and number of roots, but they all serve the same purpose to get nutrients from the ground. Researchers also claim two hypothesis about roots. One is that each part of the roots absorb different type of nutrient. In other words, the nutrient absorbed at the tip of the root and at the middle part of the root is not the same. The other one says that the entire root surface absorb the nutrient. The two hypothesis are true depending on which plant specie the researcher is talking about.
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