@incollection{icrisat4882,
       booktitle = {Advances in Agronomy},
           title = {Nitrogen availability indexes for submerged rice soils},
       publisher = {Academic Press},
         address = {Massachusetts, USA},
            year = {1983},
          author = {K L Sahrawat},
           pages = {415--451},
          volume = {36},
         journal = {Advances in Agronomy},
             url = {http://oar.icrisat.org/4882/}
}