Algae (sea weed) as agricultural fertilizers: application of fertilizers plays an important role in the yield of crops. but the continuous use of inorganic fertilizers has made the soil infertile for cultivations besides eutrophication of surface water and contamination with nitrogen of surface water. in order to overcome this problem, the use of organic fertilizers is recommended now days. seaweeds are one of the most important marine resources of the world. the use of seaweed as manure is very general in coastal areas throughout the world and particularly in france and scotland. seaweed extracts have been marketed for several years as fertilizer additives and beneficial results from their use have been reported (booth, 1965). seaweed extract is definitely capable of promoting growth in both higher plant and prokaryotic organisms (venkatran kumar and mohan, 1994, 1997). these extracts have increased the yield of crops, seed germination, resistance to frost and fungal and insect attacks and uptake of inorganic constituents. by utilizing these species as biofertilizer they can reduce the cost burden of chemical fertilizer upon the farmers and enhance the yield of crop. seaweeds are a good source of manure. plants directly absorb the high amount of soluble potash and other mineral elements present in the seaweed. application of seaweed extract showed great increase in the yield. the compost from hypnea, sargassum and other seaweeds show good results with european countries for the making of lazy beds. soil or sand is layered with seaweed for vegetable production, particularly potatoes. such organic material has proved very useful in barren areas particularly the aran island, off the mid-west coast of ireland, and parts of scotland. seaweeds are one of the most important marine resources of the world seaweed extracts have been marketed for several years as fertilizer additives and beneficial results from their use have been reported (booth, 1965). the possibilities of using seaweed in modern agriculture has been investigated by many (aitken and sen 1965, boney, 1965). different forms of seaweed preparation such as lsf (liquid seaweed fertilizers), slf (seaweed liquid fertilizers), lf (liquid fertilizers) and either whole or finally chopped powered algal manure have been used and all of them have been reported to produce beneficial effects on cereals, pulses and flowering plants. seaweed manures have the advantage of being free from weeds and pathogenic fungi. liquid extracts of brown algae are being sold as biostimulants or biofertilizers in various brand names. promising increased crop yield, nutrient uptake, resistance to frost and stress, improved seed germination of reduced incidence of fungal and inspect attack have been resulted by application of slf. seaweeds are known to contain appreciable quantities of plant growth regulators (mooney and van staden, 1985), cytokinin (smith and vanstaden, 1984), iaa (abe , h et al, 1972), gibberllins and gibberllin like substance (bentley, 1960,; sekar, et al., 1995). hence marine algae, particularly seaweeds have a vital role to play in agriculture, especially in the third world country where irrational use of chemical fertilizer and pesticides is cause of concern extensive regional trials would need to be conducted with the product to determine the environmental limits on biological activity and monitor the survival and dispersal of the inocula. hence use of modern agriculture in conjunction with traditional farming practices is the sustainable solution for the future. target beneficiaries: local shg women, local community people, farmers will be benefitted with this above project both socially and financially. objectives: • utilization of important seaweeds red alga, green algae for biofertilizer application in sustainable agriculture development. • development of suitable protocol for effective regeneration of experimental organisms and field cultivation of seaweeds using long line and floating raft methods in back water of chilika lake involving shg group of fisheries women community, farmers and rural folk. • extraction and utilization of seaweed liquid fertilizers (slf) in pulse and vegetable production. methodology : liquid fertilizer from seaweed extracts: fresh thalli of the experimental seaweeds of chilika will be collected, washed several times with chilika water to remove dust and attached epiphytes. then the thalli will be washed with tap water and then they were shade dried for six days. five hundred gram of the dried sample of each alga will be mixed with water (1:2 w/v) by boiling for an hour. the extract will be allowed to cool, filtered and the filtrate will be taken as 100% concentration of liquid fertilizer (l.f). different concentrations of slf will be tried on germination and seedling growth of pulses and horticultural plants. demand of technology and proof of concept: this technology will have a great demand to meet the decision taken in cop21 international summit at paris as a new technology for effective carbon dioxide reduction for reducing global warming.