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1

The question about soil depletion with time has been covered in other answers. Currently, in some areas, soil mineral depletion is associated with lower amounts of minerals in plants and with iodine, zinc and selenium deficiency in humans (Annals of Botany, 2010, sow-wu.nl Centre for World Food Studies, 2006). Except in the areas with known mineral ...


2

Q What is the truth? That would be nice to know, indeed. But the way this problem is formulated it is way too complex to be answered definitively with simple 'yes' or 'no'. On the one hand, it's a really simple equation of input/output. If the substrate, fertilizer and water are lacking minerals, then the plants will be lacking them as well, as they ...


8

Avery gave you a list of "yeses" by moving the goal posts to an issue of organics vs non-organic modern agriculture. Here's a peer-review no to the actual question of historical decline: https://doi.org/10.1016/j.jfca.2016.11.012 It's a study by an employee of Canada's Bureau of Nutritional Sciences Mineral nutrient composition of vegetables, fruits ...


2

The massive decline in plant compounds is attested by many studies, but I take it that your concern is whether this is linked to problems in human nutrition. The current answer is that there is not enough research on this subject. Reeve, J. R., et al. "Organic farming, soil health, and food quality: considering possible links." Advances in Agronomy 137 (...


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