2012-04-102012-04-102000Tropical Agricultural Research and Extension3(1)pp.32-38https://dl.nsf.gov.lk/handle/1/8124AgricultureNitrogen fixationIsotope dilution techniqueMultipurpose treesReference cropsBiofertilizersGliricidia sepiumCalliandra calothyrsusSenna siameaSenna spectabilisBiological N fixing capacity of gliricidia sepium and calliandra calothyrsus under different agroclimatic conditionsArticle