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.
Most oak tree leaves sport a deep green hue during the summer months, but transform into red and brown colors for the fall. 1  The oak tree is one of the most colorful fall trees, which is another reason they are popular in many types of landscaping today.ehold the breadth of the oak family. There are approximately 600 individual species listed in the Quercus (Oak) genus--most are trees, though a few are shrubs. Some are deciduous, some evergreen, some semi-evergreen.