| Sure, here is a list of points from papers that directly cite the paper you shared: - The nutrient concentration of fruits and vegetables in the U.S.A. has declined in the past 50–70 years. Organic management practices was shown to increase nutritional quality over conventional[0] - Soil fertility enhances nutrient accumulation in fruits[1] - At least 3 recent studies found median decreases between 5% to 40% or more in some minerals in groups of vegetables[2] - Significant effects on nutrient content of cultivation methods[3] - Decreases in iron content of vegetables in Australia over time [4] I would also point out that the study you linked does very little to actually combat the claims made by such studies. For example, in its treatment of Mayer 1997, it notes some potential issues (e.g. not correcting for moisture content), but mostly just points out that Mayer stated further evidence is needed and did not try to establish a "cause-and-effect relationship". Then there's another "depleted soil" hypothesis study, which I myself don't make any claims in support of. Then is points out Davis et al. 2004 which is much more statistically rigorous. It finds that the data is really messy, but when grouped together there IS INDEED a statistically significant decrease in certain minerals. Then the article goes on to talk more about how the "soil depletion hypothesis" doesn't have support in this study as well. Then they point out another 2005 study that finds similar results as Davis 2004 except it finds statistically significant decreases in even more minerals. But then points out again that the data is messy. In the end all of the studies handled showed a (statistically significant) decrease in mineral content. The main point seems to me that more research is needed to back up these claims but doesn't at any point provide evidence to the contrary. [0] https://www.mdpi.com/2071-1050/12/21/8965 [1] https://www.sciencedirect.com/science/article/pii/B978012818... [2] https://www.pulsus.com/scholarly-articles/global-food-produc... [3] https://www.mdpi.com/2223-7747/11/2/169 [4] https://www.mdpi.com/2304-8158/11/1/56 |