... mgt so trang trai tu nhan chuyen san xuat giong bo me cung cap cho san xuat Tuy nhien, hau het cac trang trai chua theo dimg quy trinh giong, (thuong trang trai Ign thuang pham mua ciia trang ... khong cao Xuat phat tir nhimg tinh hinh tren, de tai "Nghien ciiu ung dung cac giai phap ky thuat xay dung mo hinh chan nuoi Ign nai ngoai (Yorkshire, Landrace) giong ong ba cao san tai trang ... ong bd cao sdn tgi trang trgi nong hp chdn nuoi theo phuong thicc cong nghiep: + Lira chgn dugc mo hinh toi uu ve chan nuoi lgn nai ngoai Yorkshire, Landrace giong ong ba cao san tai trang trai...