Punjab being a state where the benefits of the green revolution reached the doorsteps of almost every farm household. Over time, rice-wheat monoculture resulted in the appearance of macro and micro-nutrient deficiencies in the soil which was replenished with the application of chemical Fertilizers. But balanced and soil test based application of Fertilizers has not been followed by the farmers in the state. The major objectives of the study were; to examine the level of adoption and its constraints in the application of recommended doses of Fertilizers based on soil test reports by the farmers. and to analyse the impact of adoption of recommended doses of Fertilizers on crop productivity and income of farmers. The present study relied on the primary data collected from the farmers and secondary data collected from various sources. The reference period for the study was 2012-13. The list of farmers who got their soils tested was collected from the Punjab Agricultural University, Ludhiana for the year 2011-12 to assess the adoption of recommended dose of Fertilizers. Paddy and wheat crops were selected for the study and districts selected were Ludhiana and Sangrur based on the crop area share within the state. A sample of 120 soil test farmers and 60 control farmers growing both paddy and wheat crops were selected representing all the farm categories. The trends in Fertilizer consumption revealed that at Punjab level, maximum growth in Fertilizer consumption was in phosphatic (P) Fertilizers followed by nitrogenous (N) and potassic (K) Fertilizers during last four decades and per hectare Fertilizer consumption has also increased. The analysis revealed that the major source of information about soil testing for soil test farmers was State Agricultural University (SAU) and soil testing was undertaken by the farmers due to motivation from village demonstration, training programmes attended and exposure visits to places with best farming practices. The major reason for not testing soil by control farmers was that they thought it was not required as they were getting good yield of the crops grown on their farms. Soil health card of soil test farmers showed that 70 83 per cent of the farmers reported nitrogen content in the soils as medium followed by 20.83 per cent as low and 8.34 per cent as high. The phosphorus content in the soils was relatively better with 58.34 per cent farmers reporting it as high followed by 25.83 per cent as medium and 15.83 per cent as low. Also, potassium was sufficiently available in the soils with 97.5 per cent of the farmers reporting potassium content as high and 2.50 per cent as low. In aggregate, only 40.83 per cent soil test farmers applied recommended doses of Fertilizers to paddy and wheat crops while according to farm categories 44 per cent medium, 41.56 per cent large, 35.71 per cent small and 25 per cent marginal category farmers applied recommended doses of Fertilizers to their paddy and wheat crops. The most important constraint revealed by 69.01 per cent soil test farmers in applying recommended doses of Fertilizers was the difficulty in understanding and following the recommended doses. The Fertilizer use in aggregate and according to farm categories was more on control farmers farms as compared to soil test farmers farms. All the Fertilizers were broadcasted evenly in the paddy and wheat fields by the farmers except drilling of DAP at the time of wheat sowing and manganese spray to ameliorate manganese deficiency in wheat. Mostly, FYM was applied by 43.33 per cent soil test and 40 per cent control group farmers to their paddy crop while FYM use was very low in case of wheat crop. The Fertilizers like urea and DAP were mostly purchased from the co-operative societies while other Fertilizers such as zinc, potsh, sulphur, bio-vita gypsum and manganese were mostly purchased from private fertilizer shop/ dealers by both soil test as well as control group farmers. As far as attending training programme is concerned, 41.67 per cent of the soil test farmers and 25 per cent control farmers attended one or two trainings of one day duration. In both paddy and wheat crops, average yield and value of output was more on soil test farmer farms as compared to control farmers farms and it was also higher according to farm categories. The impact of application of recommended doses of Fertilizers in terms of adopting the soil health card recommendations by soil test farmers showed that in case of paddy crop, in aggregate, increase in yield was 3.70 per cent while maximum increase in crop yield was observed on medium farms followed by small, marginal and large farms. In case of wheat crop, increase in yield was 6.16 per cent after following the soil health card recommendations while the highest increase in yield was observed on marginal farms followed by medium, large and small farms. The important changes observed by the soil test farmers after application of recommended doses of Fertilizers was the increase in crop yield and less incidence of pest and diseases for both paddy and wheat crops. Thus there was decline in fertiliser consumption on soil test farms for both paddy and wheat crops along with increase in yield which can be due to balanced use of macro and micro nutrients especially application of gypsum and green namuring of the fields by some of the soil test farmers. The major policy recommendations included; more trainings, exposure visits of farmers to the areas adopting good agricultural practices, adoption and implementation of soil health card results by farmers on their fields, visit by the scientists to the farmers fields for their motivation and incentives by the Govt. along with involvement of Gram Panchayats in promoting soil testing can be good steps in the direction of balanced use of nutrients for better crop productivity.