Gunasena, H.P.N.Sangakkara, R.Wickramasinghe, P.2010-07-062010-07-061979Journal of the National Science Council of Sri Lanka, 7(2):p.85-93https://dl.nsf.gov.lk/handle/1/6594MaizeCowpeaMung beansGroundnutsProteinNitrogenEconomicsMultiple croppingAgricultureStudies on cereal-legume intercrop systemsArticle