@article{icrisat4979,
           title = {Phosphorus Uptake by Pigeon Pea and Its Role in Cropping Systems of the Indian Subcontinent},
       publisher = {Science},
          author = {Ae Noriharu and J Arihara and K Okada and T Yoshihara and C Johansen},
           pages = {477--480},
            year = {1990},
          volume = {248},
         journal = {Science},
          number = {4954},
             url = {http://oar.icrisat.org/4979/},
        abstract = {Pigeon pea was shown to be more efficient at utilizing iron-bound phosphorus (Fe-P) than several other crop species. This ability is attributed to root exudates, in particular piscidic acid and its p-O-methyl derivative, which release phosphorus from Fe-P by chelating Fe3+. Pigeon pea is normally intercropped with cereals under low-input conditions in the Indian subcontinent. Although pigeon pea can utilize the relatively insoluble Fe-P, intercropped cereals must rely on the more soluble calcium-bound phosphorus. This finding suggests that cultivation of pigeon pea increases total phosphorus availability in cropping systems with low available phosphorus.}
}