TY - BOOK AU - Jayasinghe C K AU - Kulasooriya S A AU - Parker C A TI - Diurnal variation in nitrogenase activity of common cover crops in rubber plantations of Sri Lanka PY - 1989/// PB - Journal of the Rubber Research Institute of Sri Lanka KW - Cover crops KW - Desmodium KW - Diurnal variations KW - Mimosa KW - Nitrogenase activity KW - Pueraria ER -