Nitrogen optimization coupled with alternate wetting and drying practice enhances rhizospheric nitrifier and denitrifier abundance and rice productivity oleh Abbas Ali Abid, Qichun Zhang, Muhammad Faheem Adil, Itrat Batool, Muhammad Abbas, Zeshan Hassan, Azhar Abbas Khan, Antonio Castellano-Hinojosa, Syed Hassan Raza Zaidi, Hongjie Di, Nader R. Abdeslsalam