How much of the land surface in the world is under cultivation?

As per the Land Revenue Records of India, 'a cultivable land which is left uncultivated for more than a year but less than 5 years' is called

In India, a cultivable land which is left uncultivated for more than a year but less than five years is labelled as

Which one of the following is not a land use category?

First herbicide produced in the world is :

With reference to land reforms in independent India, which one of the following statements is correct?