The method of growing different crops in turns on the same patch of land every season is called

Why do rocks expand?

Small stones made from broken rock pieces are called

What is the main source of water for most of the plants?

Which is the soil that is dark in colour and in which plant grows?

Repeated heating and cooling

Rice, wheat and sugarcane grow well in which soil?

How many layers of soil are mainly found?

What kind of plant grow well in loamy soil?

Which soil is coarse in nature?