how does field fallow improve soil fertility
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Independent of nutrients increases in soil organic matter will increase CEC (cation exchange complex) and improve nutrient and water holding capacity of the soil. To leave a field fallow will allow one year in fertility improvement due to natural weathering and no crop removal.
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Fallow' periods were traditionally used by farmers to maintain the natural productivity of their land. The benefits of leaving land fallow for extended periods include rebalancing soil nutrients, re-establishing soil biota, breaking crop pest and disease cycles, and providing a haven for wildlife.
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