Groundnut is an important oil seed crop grown in an area of around 8 lakh hectares in Karnataka state of India under rainfed conditions. In these situations farmers applied inadequate fertilizer without knowing the initial nutrient status of the soil which resulted in low nutrient use efficiency that intern lead to low productivity of groundnut in these areas. Soil fertility deterioration due to excess removal of fertilizers and manures is one of the major causes of fatigue in crop production. At present incidence and expansion of multinutrient deficiencies in Indian soils owing to inadequate and unbalanced nutrient input through fertilizers is considered one of the major reasons for decline factor productivity of crops. Therefore efforts were made during 2012 and 2013 to understand the situation and find solutions through Precision nutrient management with mechanisation in groundnut of the central dry zone of Karnataka state, in peninsular India. The study was conducted at University of Agricultural Sciences Bangalore in farmers fields with 50 x 50 m grids have been delineated using geospatial technology and also DGPS locations have been used for each grid to map the field variability. After grid making soil samples from 0-15cm were collected and analysed for different major and micro nutrients in all the selected 139 grids. Farm yard manure 5 t/ha was applied uniformly before sowing of the crop. Zinc sulphate @ 15 kg/ha was also applied at the time of sowing of the crop. To meet the sulphur need of the crop gypsum @ 500kg/ha was applied at 35 days after sowing. The available nitrogen status of soil revealed that 8, 80, 12 per cent was low, medium and high respectively, while the available phosphorus level remained lower for 96 per cent of samples and 84 per cent of the samples found to be medium available sulphur and zinc status remained lower. The crop was sown on 27.7.2012 and18.7.2013 and harvested during last week and third week of November 2012 and 2013 respectively.   The project is in its second year of implementation, assessment, quantification of spatial variability of the field and the crop parameters like fertility status for major and minor nutrients, P^H ,EC pest and yield are done through GIS mapping in order to supplement the right quantity of nutrients and pesticides on right time on right quantity and right method.  The analysis of two years data showed that precision nutrient management with mechanized cultivation recorded 59.62 and 26.87 per cent higher pod yield of groundnut over farmers method and by adopting university package of practices respectively.  It was assessed for its variability spread in the field and insecticides were given as per variability by which we saved in the cost on pesticides.