Sentence:  Further, the country is likely to require the meat and fat, during the coming food crisis, and it is for every farmer—everyone, in fact, who has the means of keeping pigs—to do so. There is no farm in the country where a sow, and a few other pigs too, cannot be kept profitably. To-day it is the <WSD>bounden</WSD> duty of every farmer to do so. 
Meaning of the word marked with <WSD> tags:  "Now chiefly in the term" '''bounden duty''': made obligatory; binding.