Soil is just a medium. But it has to have proper/balanced moiture retention and drainage.
I consider orhanic matter as amendment not food/fertilizer. It can also store some of the nutrients and release slowly.
Manures sold in bags are light in terms of nutrients. I supplement with some synthetic granular fertilizer, as I do not practice organic method. But I DO add lots of organic matter to my sandy soil garden.
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Gardeneer
Happy Gardening !
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