Excessive soil compaction impedes root growth and therefore limits the amount of soil explored by roots. This, in turn, can decrease the plant's ability to take up nutrients and water. From the standpoint of crop production, the adverse effect of soil compaction on water flow and storage may be more serious than the direct effect of soil compaction on root growth. Alos, it can decrease a plants healthy ness according to water and nutrients
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body having the property of attracting iron and producing a magnetic field external to itself specifically : a mass of iron, steel, or alloy that has this property artificially imparted. 2 : something that attracts a box-office magnet.