References
- CHANDRASENA , J. P. N. R. and DHAMMIKA , W. H. Y. 1988 . Studies on the Biology of Panicum repens L. I. Comparative Morphological development of three selections from different geographical localities in Sri Lanka . Tropical Pest Management , 34 : 291 – 297 .
- DONALD , C. M. 1963 . Competition among crop and pasture plants . Advanced Agronomy , 15 : 1 – 118 .
- DUNCAN , D. B. 1955 . Multiple range and multiple F tests . Biometrics , 11 : 1 – 42 .
- HARPER , J. L. 1977 . Population Biology of Plants , London : Academic Press .
- HARPER , J. L. and GAJIC , D. 1961 . Experimental studies of the mortality and plasticity of a weed . Weed Research , 1 : 91 – 106 .
- HOLLIDAY , R. 1960 . Plant Population and crop yield . Nature , 186 : 22 – 24 .
- NYAHOZA , F. 1973 . Studies on the biology of Cyperus rotundus L. Early growth and vegetative reproduction strategy . East African Agriculture and Forestry Journal , 39 : 120 – 130 .
- PALMBLAD , I. G. 1968 . Competition in experimental populations of weeds with emphasis on the regulation of plnt population size . Ecology , 49 : 26 – 34 .
- WILLIAMS , R. D. , QUIMBY , P. C. and FRICK , K. E. 1977 . Intraspecific competition of Purple Nutsedge (Cyperus rotundus) under greenhouse conditions . Weed Science , 25 : 477 – 481 .