Back to matchesWe found a matchYour institution may have rights to this item. Sign in to continue.TitleGrowth and nitrogen fixation of Azolla pinnata and Azolla caroliniana as affected by urea fertilizer and their influence on rice yieldAuthorsSingh, P. K.; Manna, A. B.SubjectsNITROGEN fixation; GROWTHPublicationPlant & Soil, 1990, Vol 122, Issue 2, p207ISSN0032-079XPublication typeArticle