Z.  Changiz-Dalivand, M.  Ashouri, T.  Razavipur, 
    Effect of Azolla Compost and Nitrogen on Yield and Components Yield Rice (<i>Oryza sativa</i>) in North of Iran,
    Research Journal of Biological Sciences,
    Volume 7,Issue 6,
    2012,
    Pages 255-259,
    ISSN 1815-8846,
    rjbsci.2012.255.259,
    (https://makhillpublications.co/view-article.php?doi=rjbsci.2012.255.259)
    Abstract: In order to assess the effect of Azolla compost and Nitrogen 
  on yield and yield component of <I>Oryza sativa</I>, an experiment in factorial 
  format based on randomized complete block design with 3 replications in Iran&#146;s 
  Rice Research Institute (Rasht township) in 2011 was conducted. Experiment factors 
  include chemical fertilizer on 3 levels (control, 40 and 80 kg ha<SUP>-1</SUP> 
  nitrogen) and organic fertilizer on 4 levels (control, 2.5, 5 and 7.5 ton ha<SUP>-1</SUP> 
  Azolla compost) based on dry weight. Results indicated that using of Nitrogen 
  fertilizer and Azolla compost rate had a significant effect on the grain yield, 
  thousand grains weight, plant height, number of panicle and number of tiller. 
  Also in this experiment determined that interaction effects of Nitrogen fertilizer 
  and Azolla compost is significant only on the number tiller.
    Keywords: Rice;Azolla compost;Nitrogen fertilizer;yield;yield components