How many Agro-ecological regions are there in India

Which of the following is appropriate for a clay soil?

The degree of distinctness and durability of individual peds determines by:

The rice variety recommended under semi dry condition is

Efficiency with which irrigation water is conveyed from the source to field is indicated by

Additives which are used to maintain a uniform dispersion of one liquid in another, such as oil in water.

In a combine harvester, the ratio of reel peripheral speed to the forward speed should normally be in the range of 

T.S.S of jam is(ºBrix)

Which one of the following element is not essential for plant growth is:

Which country is the largest producer of Mango in the world?

The transformation of nitrates to gaseous nitrogen is accomplished by microorganisms in a series of biochemical reactions. The process is known as: