Kundu, D.K.Ladha, J.K.2012-12-062012-12-061999Agrieast1pp.1-10https://dl.nsf.gov.lk/handle/1/9485AgricultureSoil managementSoil fertilityNitrogen fixationSoil microorganismsRice cultivationSoil biologyMultiple croppingEfficient management of soil and biologically fixed nitrogen in intensively-cultivated rice fieldsArticle