The atmosphere contains oxygen gas that necessary for the respiration process, It is a mixture of gases surrounding the Earth, It is attracted to Earth by gravity, It protects the Earth by absorbing ultraviolet...
Sand soil is well-aerated soil that has low absorption of water, clay soil is poorly aerated soil that has a high absorption of water, and silt soil is moderated aerated soil that has moderate...
The soil is composed of three layers, They are the top soil layers, the lower soil layers, and the rocky layers, The soil horizon is the layer that is parallel to the soil crust,...
The soil is the main component of the environment as it is necessary for all living organisms (plants, animals and human), the plants take minerals and other nutrients from the soil to live and...
