The study in question was by "Deep Science Ventures" - a venture capital firm specializing in bio-technologies.
People have been trying to spin stories about soil degradation since... ironically, the 1960s.
While these might be true, the actual answers are usually much more mundane:
- We choose fruits and vegetables increasingly for their taste
- The rise of hydroponics and salad vegetables in general
- Quicker harvests with less time to absorb nutrients
Our diets are much more diverse and fortified compared to the pre-war period - nutritional deficits are not nearly the concern they used to be.