Commercially available chemical fertilizers contain the same nutrients and micronutrients as organic fertilizers such as manure and composted garden clippings  Plants have tiny root hairs that absorb nutrients, and whether the source of the nutrients is organic or chemical is irrelevant to the plant's ability to take in the nutrients
Nevertheless, organic fertilizers are better for the health of the plant than are chemical fertilizers alone
The nutrients in organic fertilizers are slowly released to the plant over time, rather than being absorbed by the plant immediately.