You cannot harvest your neighbour's crops in FarmVille. You can, however, fertilise their crops and feed their chickens during visits to their farm.
Plant different crops to harvest. buy expensive things for your farm. Or help your neighbors with their farms.
No.
you cannot harvest other people's crops in Farmville. As far as I know only FARMTOWN lets others harvest and plow other person's farms.
Harvest crops.
Don't stop planting and harvesting. Get more neighbors and harvest all your trees and animals on time. Visit your neighbors' farm and fertilize their crops to earn extra gold and experience.
You install the FarmVille toolbar from FarmVille.com
You harvest crops, and you visit neighbours farms.
none your buisness!
You cannot harvest a neighbours plants in Farmville.
You harvest crops, and visit neighbours farms and help them out.
Ask your neighbors to help fertilize your crops.
You harvest Crops/ Animals until you have enough exp