That was a thing in Japan: "In some cases, farmers established annual contracts with urban families. Called tsuke-tsubo, these agreements stipulated that a far

That was a thing in Japan: "In some cases, farmers established annual contracts with urban families. Called tsuke-tsubo, these agreements stipulated that a farmer could collect all of the household’s night soil for a year in exchange for a certain amount of rice as a down payment. So the residents would save their shimogoe for their particular farmer." https://www.guernicamag.com/raising-a-stink/ https://www.guernicamag.com/raising-a-stink/ Which was promoting this book: The Other Dark Matter: The Science and Business of Turning Waste Into Wealth and Health