The Bulletin. 



13 



k <* '■ # *» if ;* k ■: "• 'J IS f-«.\|.-^ 



3&%3 



/-•■"■■-v. 





' - ,r 



'■;■ 



: g£ lilted 



Fig. 1. The hill system of cultivation. 



Fig. 2. The matted-row system of cultivation. 



