Oak

Oak trees require level 15 Woodcutting to chop down. They are the second lowest level tree that gives more than one log before being cut down (the lowest level that gives more than one log is the rare scrapey tree). The most logs you can get at one time is currently 50. They are quite common, and you can find them in many places. Good spots to cut them down include just west of Varrock West Bank, Tree Gnome Stronghold, Draynor village just east of the bank, between Falador and Draynor Manor (near the wall of Falador), and the Jail yard.

Chopping Oak trees has become a fair source of income for low-level members as many people use the logs to make oak planks which are very useful in training Construction. High leveled player may chop these trees to stock them up in their bank for skills like Fletching or Firemaking, however there is a possiblility to sell the logs at the Grand Exchange for a good amount of money.

fucking Farming yes you are looking at farming, no life runescape newb.
Oak trees can also be grown with the Farming skill. Players must have level 15 Farming and may plant an acorn into a plant pot with soil. Acorns can be found in a birds nest, which can be found by sometimes chopping down trees, such as Willow trees. After this has been completed, they must water the plantpot, wait for it to grow into a sapling and then plant it into a wood tree patch in the Tree Gnome Stronghold, Lumbridge, Falador, Varrock, or Taverley. Payment is one basket of tomatoes (5).

Planting the acorn gives 14 Farming experience and checking the tree once it has finished growing gives 467.3 experience. It takes around 140 minutes for an oak tree to grow. A fully grown tree can be cut and can be dug up to gain oak roots.

Construction
A bagged oak tree can be planted in the Garden of a Player-owned house. It requires 1 bagged oak tree, a watering can, and 15 Construction. When built, it earns the player 70 experience for construction and farming.