Grammar Gurus: proof read this phrase.

[Irving]

Okay Grammar Gurus, put yourself to the test. I came across this sentence in a book I'm reading, and I thought this would be a great test sentence. I'll leave in the capitol letter at the beginning and the period at the end, the rest up to you. Now, of course I'm no expert, so I don't know how right this is, but I assume it was proof read by a professional editor. After a few days, I'll edit the first post with the way this phrase reads in the book.

The situation in mesoamerica contrasts strongly that area provided only two domesticable animals the turkey and the dog whose meat yield was far lower than that of cows sheep goats and pigs and corn mesoamericas staple grain was as Ive already explained difficult to domesticate and perhaps slow to develop.

I realize that this is a little difficult without any context, but it is the beginning of the paragraph, so it shouldn't be too difficult to make it grammatically correct regardless of context.