Soil: It is the upper most layer of earth and is a mixture of minerals, gases, organic remains, liquids, clay and rock particles which support the life cycle of a plant.
Soil Erosion: It is a natural process but occurs at a faster rate with more hazardous results if it is a result of activities of human beings such as deforestation and construction on agricultural land.
Basic components of soil: Soil is made up of 45% rock particles which are formed due to the pressure of wind, water and chemical processes over a period of time, 25% of water from various sources of river and rains, 25% from various gases present in the air, 5% organic matter which is formed from the fallen leaves of the trees and remains of animals.
Here the topic of discussion is “if construction will be continued on good soils, what are the future implications or constraints for urban development into agricultural land?”
Soil pH: It is a mixture of soil acidity and alkalinity. PH is tested to measure the degree of acid and alkaline as a substance in the soil. It is an important ingredient in the soil as it influences the capacity of plants to take nutrients available in soil for their growth. If the pH level is 7.0 in the soil then it is considered as neutral whereas the soil which contains more acids have the value of pH below 7.0 and if pH is above 7.0 then the soil is alkaline (Wang, 1997). The soil which is below 7.0 (pH) then it lacks nitrogen, phosphorous, potassium and sulphur.