Given how much soy is typically consumed by animals (many times their body mass) I'd be surprised by that. I'll try and find that research.Tofu and Quorn both are imported and require more land to be cultivated, compared to say UK meat products (reasearch commissioned by the WWF at Cranfield University).
Large numbers of vegetarians eat fish - well known that a great deal of fish stocks have been in decline for the past 100 years.
No vegetarians eat fish - by pretty much any definition I've seen. Some people who eat fish cause confusion by describing themselves as vegetarian.
Vegetable production is mostly intensive farming with large amounts of fertiliser and pesticides needed (unless organic, but not many vegetarians I know eat only organic fruit and veg).
This is true - but so is most meat produce. I estimate I probably eat about 60% organic - and strive to increase that.
If you can find an article about soy bean production by Matthew J. Rales (Wise Traditions [the Weston A. Price Foundation quarterly journal]), it will be an eye opener.
I shall try. I don't consume a lot of soy and do ensure it is all organic as that also ensures that it's not grown on plains created from reainforest clearance like some soy produced for animal feed (and unfortunately supermarket own-brand veggie meals).
A lot of land cannot be used for anything else, apart from rearing cattle or sheep.