How can genetic engineering can be used in agriculture to prodce more efficient crops

Genetic engineering is very useful especially us people who can use them in our daily needs. For example producing efficient crops. By getting a certain trait and putting it in the subject you want to be improved you could have more efficient crops. You could improve its quality, time of growth(to be faster) and more. 

Ex.
   Corns are one that genetics is working on.

Engineering can be very different in some occasions