field trials on sobyean (Glycin max L.) were conducted at Sakha
Agricultural Research Station in 2000 and 2001 seasons. This research was
designed to study the effect of Rhizobium inoculation and adding Zn, Mn, Fe,
separately or as mixture by using seed coating method on sobyean. The most important findings could be summarized as follows: Inoculation with Rhizobia and/or fertilization with micronutrients significantly
increased number and weight of nodules and dry matter of plants. Nitrogen content of dry matter and seeds recorded significant increases. The highest seed yield 1.7 and 1.6 ton/fed. for 2000 and 2001 seasons,
respectively were obtained by adding the mixture of Zn, Mn, Fe using coating
seed method and rhizobium inoculation. Results confirm the importance of inoculation soybean seeds since it is cheaper
and more effective for ensuring adequate N for soybean than application of
combined nitrogen fertilizer.