Why do farmers add fertilizers and manures to the soil in their farms and fields? 

Name the following:

I am the hardest rock on the earth. I am also used in making jewellery. My name is:

Unscramble the jumbled letters and answer the following: SIOLPOT

I am the loose soil. Plants grow and small animals live inside me. My name is:

My particles are the smallest of all other types of soil. I am sticky when wet. My name is