Among these statements which one is incorrect regarding

A Double top cross refers to:

The measurement of drought is expressed in 

‘Pusa Nanha’ is the variety of:

If grain and straw yields are 4 and 6 t/ha, respectively, the harvest index will be

Which concept in agriculture involves growing two or more crops on the same land sequentially within a year to maximize productivity?

Sowing of a crop at an optimum date is an example for 

What is the name of a self-fruitful variety of Prunus domestica grown in India?

Which one of the following instrument is used to measure wind speed?

Which seed dormancy-breaking treatment involves exposure to low temperatures for weeks or months?

A situation when the rainfall deficiency is 25% or more of long term average, it is classified as