"Plentiful harvest" refers to the plentiful or large amount of crops or food that is gathered from farming or agriculture. It signifies a bountiful or successful yield, usually resulting in an abundance of food. Full definition
Throughout history, special powers have been attributed to eggs, including the ability to predict the future, bring good luck and guard against the bad, to cure ills both social and medical, and to guard against infertility and insure plentiful harvests. (fieryfoodscentral.com)
Wherever they went, they made the ground produce rich and plentiful harvests, but the group were doomed to extinction. (religion-online.org)