Ref1
https://books.google.com.my/books?id=QZZ5mN5KoNUC&pg=PA17&lpg=PA17&dq=pachyrhizus+erosus+minor+crop&source=bl&ots=z0cuncmcRC&sig=ACfU3U12kLsCJnB2z-3PLL6Pl2jHyPIkeg&hl=en&sa=X&ved=2ahUKEwiy8qDw3ovjAhUJvI8KHTybDYsQ6AEwAnoECAgQAQ#v=onepage&q=pachyrhizus%20erosus%20minor%20crop&f=false