Dimasa riddle (Hadam guphu, maimu gishim)

This is a short video of a one line Dimasa riddle on writing a Book narrated by Nrityojoy Hojai of Kumacherra village -  

"Hadam guphu, maimu gishim = Laishi rebba" 

Empty field is white, rice seed is black = writing a book

In this Dimasa riddle writing a book is referred as an white empty field and black rice seed because for those who study, writing in a blank book or copy is like a sowing and cultivating rice in an empty field. The riddle has a deep meaning for the student community