Soil is an important resource that decides the diversity of life in an area.
The factors for making up of soil is as follows-
Soil fertility - definition
Soil fertility refers to the ability of a soil to sustain plant growth, i.e., to provide plant habitat and result in lasting constant yields of high quality.
A fertile soil has the following properties: It is rich in nutrients necessary for basic plant nutrition, including nitrogen, phosphorus and potassium.
Effect of flowing water on the top-soil - definition
Procedure:- (1) Take two identical traysand fill them with soil. Plant mustard/green gram/paddy in one of the trays and water both the trays regularly for a few days, till the first tray is covered by plant growth. Now, tilt both the trays and fix them in a position.Make sure that both the trays are tilted at the same angle. Pour equal amount of water gently on both the trays such that the water flows out of the trays, as shown in the figure. (2) Study the amount of soil carried by the trays. (3) Now, pour equal amounts of water on both the trays from a height. Pour three or four times that you poured earlier. (4) Again, study the amount of soil that is carried out of the trays now. Observations:- (1) The amount of soil which flows from the first tray is very very less than the amount of soil flowing in the second tray. Inference:- (1) The roots of the plants hold the soil firmly,preventing the soil from getting eroded.
Soil erosion - definition
Soil erosion is a naturally occurring process that affects all landforms.
The agents of soil erosion are water and wind, each contributing a significant amount of soil loss each year.
Soil erosion impacts the agricultural industry as well as the natural environment.
The effects of soil erosion can be felt both on-site, meaning at the site of soil disruption, or off-site, meaning the location where the eroded soil deposits.
When the topsoil iseroded from an area, that area loses its most nutrient-rich layer, and therefore soil quality is reduced.
minerals- natural resources - definition
Minerals are found in earth's crust and are non-renewable resources.
It is formed due to the earth's geological process over millions of years.
Minerals can be extracted by the process of mining.
Some minerals are metal e.g., gold, iron, copper and some are non-metal e.g., carbon, phosphorus, sulphur etc.