Introduction:The typical definition of eutrophication is 'decrease in the levels of oxygen in the water bodies due to effects of excessive use of chemical fertilisers.' This statement clearly tells us all about the cause of the problem of eutrophication.
Oak is a common wood, yet many people arenât aware that there are two distinct species â red oak and white oak. Between the two, there are only subtle differences when it comes to durability, hardness, and cost. Color and grain pattern are the distinguishing features that set red oak and white oak apart.
Submit. North America is home to many oak trees. Oaks are easily distinguished by their lobed leaves and their unique seeds, the acorns. Acorns are hard, round seeds that can range, depending on the tree, climate and location, from 3/4 inch in diameter to over 1 inch in diameter.Acorns are rounded with a sharp tip.heir trunks can be several feet in diameter. The bark of the white oak is ashen-gray or white. On younger trees, the bark is scaly or platy, but older trees can have smooth areas of bark. White oak is most common at the east of the Mississippi river.