00521nam a2200181Ia 4500 CTU_27744 210402s9999 xx 000 0 und d 633.18894 O62 IRRI Opportunities for biological nitrogen fixation in rice and other non-legumes IRRI Dordrecht Kluwer 1998 rice - fertilizers Nguyễn Quang Điền, 990104 Trung tâm Học liệu Trường Đại học Cần Thơ