The study was conducted at Visakhapatnam district of Andhra Pradesh on FLD in blackgram by Scientists of district Agricultural Advisory and Transfer of Technology Centre of ANGRAU. Blackgram crop was sown as rice fallow in Rabi season during 2018-19 and 2019-20 in an area of 4229 ha and 4950 ha also it was found in an increase in yield of 32.7 per cent and 47.3 per cent in FLD field, respectively. Thus, it was concluded that front line demonstrations conducted under the close supervision of scientists is one of the most important tools of extension to demonstrate crop management practices at farmers’ field. FLDs motivate farmers to adopt scientific practices. So, FLDs are to be designed, supervised with extension activities viz., training programmes, demonstration, field days etc. to increase yields and profits of farmers.