Squat and deadlift goes hand-in-hand. Both are a compound, multi-joint movement exercise. Some trainers argue, that squat is the best, and other trainers argue, that deadlift is the best exercise for strenght development and vertical jump. The technique of the deadlift is simpler than the technique of the sqaut, so it's easier to learn. This is the exercise where one can lift the biggest amount of free weight.
Useful links for deadlift:
Barbell Deadlift
Here is some thorough article about deadlifting:
How to Master the Deadlift (by StrongLifts)
How to Deadlift (by DieselCrew)
Barbell Deadlift (by VerticalJumping)
Squat and Deadlift (by VerticalJumping)
Mastering the Deadlift Part I (by T-Nation)
Mastering the Deadlift Part II (by T-Nation)
