Manual harvesting of paddy by marginal farmers.
Yada Venkateshwar rao developed a machine which is self propelled and cuts the paddy as is cut manually by a sickle and puts aside for collection manually. It harvests the paddy like cutting manually with sickle. A three wheeler engine was used that consumes one litre diesel for one hour and can harvest one acre. 8-10 acres per day can be harvested thus increasing the speed of harvesting and catering to the shortage of labour which is faced by the farmer.
Link: Affordable, Three wheeler engine, easily maintainable
Problem Scale: Rural areas