You must have noticed that the leaves of most trees turn brownish in color before they fall. On the basis of autumn defoliation ( shedding of leaves), trees and plants can bed divided into two groups.
The first includes those plants and trees, which undergo defoliation every year and are called deciduous trees, while the other includes the evergreen plants or trees, which defoliate very slowly and remain throughout the year.
Evergreen plants also undergo defoliation but only a small portion of their leaves fall off, at one time. Every year, with the approach of autumn, the trees begin their period of rest. In autumn, the trees begin their period of rest. In autumn, the leaves fall and eventually decompose into mold and humus, which are essential to support rich vegetation.
During this period, gradually their leaves turn yellow and then curl up and fall on the ground. The trees remain almost completely active until the arrival of spring. The denuded or defoliated trees or plants are a sad sight, but at the same time very useful to plants, because it eventually gets a new lime and looks, Before defoliation, the leaves take yellowish, brownish, and reddish hues.
Why do the trees shed their leaves?
We know that plants are living organisms, which need food to survive. This food is obtained by utilizing the organic substances provided by the leaves. Just like animals, plants also produce waste materials and have to get rid of them, but they do it in a different way.