Abstract:Three yibeld structural models of two cotton finite populations ar(?)investigated by multiple regression.(1)Results indicated that modle Ⅰ,lint yield/unit are a(?)=boll num-bers/unit area(B/M)×single boll weight(Y_1/B)×lint percentage(Y_2/Y_1);model Ⅱ,lint yield/unit area(y_2)(?) numbers/unit ar