What is silviculture? What are its advantages?

Silviculture is the programme that aims to grow more trees and plants in order to replenish forests.
Following are the advantages of silviculture:
(a) It prevents flood and soil erosion.
(b) It maintains the water cycle.
(c) It helps in wildlife conservation by increasing the area of the earth under the forests.
(d) It provides different raw materials for industries.