When describing the Northern Dalelands, in page 53:
.Newly built farms and villages are springing up everywhere, and golden fields of corn have been sown
Am I missing something (like a second meaning) or is it referred to the plant brought from America to Europe?
If it's the American plant, I'm afraid is not the best option. From Tolkien Gateway:
"And just bring out the cold chicken and tomatoes!"
― Gandalf to Bilbo Baggins, An Unexpected Party
Tomatoes were supposedly a plant known to the Hobbits.
They were referenced in the first edition of The Hobbit,[1] but J.R.R. Tolkien changed this to "pickles" in the third edition (1966).[2] The most usual explanation for the change is that the American plant-life would not fit in his setting of ancient Middle-earth. However, as pointed out by John D. Rateliff, it may have been simply that Tolkien felt that it was too early in the year for tomatoes and substituted a preserved food instead.[3]