T.  Sedghpour-Sabet, H.R.  Doroodian, H.  Besharati, 
    Effect of Biologic Stabilizers of Nitrogen and Chemical Fertilizers on Quantitative and Qualitative Characteristics of Rice,
    Research Journal of Biological Sciences,
    Volume 7,Issue 6,
    2012,
    Pages 250-254,
    ISSN 1815-8846,
    rjbsci.2012.250.254,
    (https://makhillpublications.co/view-article.php?doi=rjbsci.2012.250.254)
    Abstract: To study the effects of reconciliation usage of some of nitrogen 
  stabilizers (Azetobacter, Azospirilium and Azorhizobioum), chemical fertilizer 
  of urea, Zn (Zinc) and Fe (Iron)-EDDHA on the operation and operation components 
  of rice, a split-factorial test in the framework of complete random block design 
  was conducted with 3 replication in Bandar-Anzali (North of Iran) in 2011 crop 
  year. In this test, nitrogen fertilizer as the main factor was in 3 levels (control, 
  biologic fertilizers (reconciling Azetobacter, Azospirilium and Azorhizobioum 
  bacteria) and chemical fertilizer of nitrogen (150 kg ha<sup>-1</sup> urea)) 
  and two subsidiary factors were fertilizers of Zn and Fe-EDDHA in two levels 
  (control and using 5 in 1000 EDTA EDDHA in the form of leaf). Results showed 
  that the effect of nitrogen fertilizer on stalk length, number of grain per 
  cluster and the content of grain was meaningful in 1%. Reciprocal effects of 
  nitrogen and Zn on the number of tillers in square meter and reciprocal effect 
  of nitrogen, Zn and Fe on the length of cluster was meaningful in 5%. The highest 
  mean of stalk (113 cm), number of grain per cluster (89.4) and the content of 
  grain (54.2 kg ha<sup>-1</sup>) was achieved by using urea fertilizer.
    Keywords: Rice;biologic and chemical fertilizer;nitrogen;Fe- EDDHA;Zn (Zinc)-EDDHA