नदी

When male flowers are borne on one plant and female flower on a different plant the species  is

Which among the following states have highest Alkali problematic soil?

The practice of planting different crops sequentially on the same plot of land is called

TRYSEM is related to which of the following

An association between organisms of two different species in which one is inhibited or destroyed and the other is unaffected is called

Irritation of eye due to cutting onion is due to presence of:

Fruits on the basis of respiration can be classified as

Which one of the following essential nutrient elements is absorbed both as an anion and a cation by some plants?

Development of marginal burning and scorching in the lower leaves of the plants are observed due to the deficiency of _____

The optimum age of seedling for transplanting long duration rice varieties is