00487 a2200145 4500 631.558 OPT 21978 34496 Optimizing yields-the role of fertilizers Worblaufen-Bern International Potash Institute 1982 1982 305p. 23cm Proceedings of the 12th IPI-Congress, June 1982 at goslar / federal republic of Germany YIELDS CULTIVATION AND HARVESTING,AGRICULTURE,FERTILIZERS L 49401 49401 0 0 0 0 LEN MKDL MKDL LEN 2009-08-11 0 631.558OPT 52546 2009-08-11 00:00:00 0.00 2016-10-31 L 0 0 0 0 LEN MKDL MKDL LEN 2009-08-12 0 631.558OPT 52422 2009-08-12 00:00:00 0.00 2016-10-31 L 0 0 0 0 LEN MKDL MKDL LEN 2009-08-12 0 631.558OPT 50100 2009-08-12 00:00:00 0.00 2016-10-31 L