Basically, anything you plant will take certian nutrients out of the soil. If you continue to plant the same thing in the same place, those nutrients being used will be quickly depleted. Crop rotation involves planting a different crop (Crop #2) after the first crop (Cro #1) is harvested – Crop #2 will take DIFFERENT nutrients from the soil, allowing those nutrients depleted by Crop #1 to be restored. Pathogens and pests also build up if one crop is planted time after time, and crop rotation helps to prevent this naturally.
Crop rotation has several benefits to help the soil. It increases the variety and volume of organic matter in the soil. Crop rotation also creates a stronger soil structure which lessens the chances for erosion and increases the soil’s water capacity. The healthier the soil, the less likely the case for crop disease and pests.
Crop rotation can also assist with crops in dryer climates. If the crop gets too dry, the topsoil begins a process called Desertification, which is exactly as it sounds, the soil get too dry and becomes desert-like. When you rotate the crop, you are creating new topsoil which will make the ground arable again.
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