C.M. Tippannavar Studieson the seed borne nature of Azotobacter chroococcum In wheat (Triticum durum L. And Triticum aestium L.) In relation to i - Ph.D (Agri) - Dharwad Univrsity of Agricultural Sciences, Dharwad 1995 - 196p ENGLISH Dewey Class. No.: 630 / TIP