![]() ![]() They open up small spaces, known as pores, within the soil. Improving soil structure: Earthworm burrows alter the physical structure of the soil.Earthworms also take nutrients down through the soil profile, bringing them into closer contact with plant roots. Scientists have measured up to five fold increases in nitrogen availability in earthworm casts compared to undigested soil. Nutrients like phosphorus and nitrogen become more readily available to plants after digestion by earthworms and being excreted in earthworm casts. ![]()
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