Goonasekera, G.A.J.P.R.Peiris, L.T.2013-05-082013-05-081977Journal of the Rubber Research Institute of Sri Lanka54(1-2)pp.299-305https://dl-rri.nsf.gov.lk/handle/1/1403Girth and height measurements of a number of young rubber plants of several clones were recorded for a period of over six months. The effect of weather factors; rain, humidity, pressure, wind, sunshine and temperature on the growth parameters were investigated using regression methods. Seasonal changes in girth and height were also studied.Biological sciencesPlant physiologyA