Agribusiness is in it for the money, so they prefer heavy equipment over laborers (where possible for stuff like corn and wheat), the fertilizer, irrigation and pesticides are there to minimize chance and acts of nature, to make the profits predictable.
Yep and using hormones and gas to manipulate the development of greens and fruits. Frankly, one of the reasons I take a multivit, is because I'm not entirely sure the vegetables I eat are anywhere close to the micronutrient profile they should have.
BTW Some time ago one of the admins here posted links to a couple of documentaries to kickstart a discussion. I saw one and it was quite impressive stuff really, seeing how CAFOs are operated and the gorilla style of big corporations is -simply put- scary.
When I say girls, I mean 20+ y.o. Chinese females -- which by American standards -- emotionally, physically -- they're about 15 y.o. I know this isn't conclusive evidence, but it just seems strange -- I would've expected to see an increase in females maturing at a younger age in China where the consumption of soy is comparatively high. I've been here for over 10 years.
I won't pretend that I have an explanation, but a couple things came to mind: puberty can be delayed by poorly balanced nutrition or simply not enough calories, so maybe your average 20yo might not be the best sample.
Also, I've read that countries that have been traditionally consuming soy in their diet, eat a significant part of it in fermented forms, which would improve dramatically its nutritional properties.