Riparian ecosystems in North Indian Plains which are usually left as waste or neglected land when managed for winter cropping showed to be highly productive. The productivity and chlorophyII density estimated for total crops and total weeds showed high values of community productivity and community cholorophyII density (1.99 gm-2). There were distinct variations in fractionated standing phytomass and productivity in the three zonations of the riparian agro-ecosystem. Total crops and weeds had significant positive correlation between productivity and chlorophyII density.
