00512nam a2200181Ia 4500 CTU_29976 210402s9999 xx 000 0 und d 581.13 M544 Konrad Mengel Principles of plant nutrition Konrad Mengel, Ernest A Kirkby Switzelend International Potash Institute 1982 plants - nutrition Liên, 990121 Trung tâm Học liệu Trường Đại học Cần Thơ