Who introduced ‘Do-aspa and Sih-aspa’ system?

Zabti system was introduced by –

In medieval India, why was the mansabdari system introduced?

Which medieval ruler introduced the system of “patta” and “qabuliyat” to help the peasants?

The Mansabdari System introduced by Akbar was borrowed from the system followed in –

Maize (makka) was introduced into India via