An 8% decline is not a "collapse." Also, this could be considered a feature, not a bug, that crops can be produced with less fertilizer, that zinc and iron is still in the soil for the following years. Nutritionists always say that eating a balanced diet provides people with far more of the essential minerals and vitamins than we actually need.

So an alternative headline: "Climate change allows crops to be produced more abundantly and with less fertilizer and added micronutrients, while retaining more than 90% of their nutrients"