WHY ARE EARTHWORMS CALLED THE FRIENDS OF FARMERS?

Please explain the formula for percolation rate.

what type of crops can grow in clay and lomy soil?

explain the different stages of soil formation?

 what the sandy soil is used for?

what is soil profile ?explain.

what type of crops are grown in desert soil

WHY SOIL IS IMPORTANT FOR US?

what is the difference between raw and baked soil ?

What kind of soil is most suitable for making toys and why?

how terrace farming prevent soil erosion?

which soil has the highest percolation rate ??  i cannot understand hat is PERCOLATIN RATE ??????