Answer the following questions in not more than 125 words.
How do you know that a particular type of soil is fertile or not? Differentiate between naturally determined fertility and culturally induced fertility.
Soil fertility refers to the ability of soil to support plant growth. Several factors influence soil fertility. In general, fertile soils are:
• Rich in nitrogen, phosphorus and potassium.
• Contain minerals like boron, chlorine and magnesium
• Presence of ample organic matter to retain moisture
• Presence of microbes and nitrogen fixing bacteria
Soil fertility might be renewed naturally by floods and overflowing of banks or culturally, by the use fertilisers and manure. Periodic replenishment is essential for sustenance and continued productivity of land.