Which one of the following aspects is not covered in

Why is a float valve important in the water tank of a drip irrigation system?

_____________________ is the prominent member of 1:1 type group in which one tetrahedral and one octahedral layer is present.

The maximum amount of water that a soil can hold after the excess has drained away under the force of gravity is called

Dokuchaev, The Father of soil Science, did pioneering work on “Chernozem” somewhat similar to that of Indian soil of:

The book, Historia naturalis was prepared by 

Urea fertilizer is the main source of nitrogen,applied in our fields ,The NPK ratio of urea is:

The groundwater table is measured by:

Winter banana is a variety of

Sunflower is an ..................?

Which one the following crop is called biological plough of soil?