When did cotton become a well-established crop in the

The period from first irrigation to last irrigation is called

The size of the clay particle is

Which of the following soil microorganisms is responsible for fixing atmospheric nitrogen into a usable form for plants?

As per Indian Minimum Seed Certification Standard (IMSCS), minimum physical purity required for certified seed class of Bhendi (or) okra? is

The  Directorate  of  Coldwater  Fisheries  Research (DCFR) is located at___ and was formerly known as NRCCWF. 

Biological Control Programme is successfully used in control of cottony cushion scale, Icerya purchasi on fruit trees by:

A well-known practice to ensure adequate nitrogen of legumes in lieu of N-fertilizer is

Which member of honey bee colony produces royal jelly? 

Inter breeding of individuals of same breed which do not have common ancestors for 4 to 5 generations?

What is the immediate and serious health threat posed by excessive nitrate concentrations in drinking water, especially to infants under 3 months of age?