Once a tree is removed, both the stump and the roots can be removed, the stump ground while leaving the roots, or the stump can be left alone. If left untouched, a tree's stump and roots will begin to rot and, over time, become a home for pests, fungi and other organisms. The reason the soil sinks after the felling of trees is due to the accumulation of water beneath the ground. Trees act like a sponge by absorbing excess water from the soil.
You may notice that the area where a tree grows is normally hard and dry. Sometimes it is necessary to cut down a tree because of excessive space growth, storm damage, illness, or age. Once the tree is fallen, the trunk is chipped into mulch and the wood is removed, the roots remain in the ground. While roots may not become a problem, some species grow vigorously and aggressively, and sprouts reappear in the yard.
In those cases, an additional step in the extraction process will discourage root regrowth. The removal of trees will cause changes in the soil. If you decide to remove the tree through chemicals, those chemicals will have long-term effects on the soil. Glyphosate is a non-selective herbicide that can be used on stumps to kill the rest of a tree.
When this chemical saturates the soil around it, it can stay for a while, which could kill future plants if that patch of soil is used again. This has a negative effect on the soil. Over time since the tree was removed, the ground where the tree was has become very soft and soft. Not only will you have to deal with your backyard being invaded by tree roots, but they can also reach underground pipes and damage them in the process.
Tree roots stop growing as soon as the tree is felled, but when they remain in the ground they also decay over the next decade and can cause fungi to appear more in the garden wherever they arrive. If you remove the tree that grows there, you're basically removing the sponge that absorbs all the excess water. If you're planning to sell the house in the future, a tree stump in the backyard is enough to scare away potential buyers. The tree could be sick, it could be opening the construction of a new project, or you might suspect that the tree is causing the foundation to break.
In addition, when the offending root system is treated with herbicides, neighboring trees of the same species may be affected due to root grafting. Tree roots, especially those of large trees, help anchor the tree and absorb all the water and nutrients needed for the tree to grow. The reason they release this water is because trees tend to absorb most of the moisture from the soil around them. Even if only the tree stump is left, the roots can spread to the ground and cause serious damage to their environment.
The roots left in the ground retain the energy stored when the tree was alive and produce sprouts. Depending on the tree, it could take two to seven years of persistent removal of shoots to deplete the energy stored in the roots. Some tree species aggressively sprout from the roots, even after cutting down the tree and shredding the stump. Letting the stump of a tree or the roots of the tree decay on their own also causes the ground to sink, since, over time, water will fill the spaces they leave behind.
The effects that felling trees can have on soil are why it's so important, when planning to felling trees, to find reliable and knowledgeable professionals.